CN114553304B - Scattering communication system - Google Patents
Scattering communication system Download PDFInfo
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- CN114553304B CN114553304B CN202210056659.3A CN202210056659A CN114553304B CN 114553304 B CN114553304 B CN 114553304B CN 202210056659 A CN202210056659 A CN 202210056659A CN 114553304 B CN114553304 B CN 114553304B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
本发明提供一种散射通信系统。该散射通信系统应用于外部业务终端与外部通信目标之间的通信，该系统包括依次连接的通信控制模块和信号处理模块，还包括分别与信号处理模块连接的M个射频模块，M≥2；在外部业务终端向外部通信目标发送业务信息时，通信控制模块、信号处理模块和M个射频模块组成M条正向通信链路，保证通信；在外部通信目标向外部业务终端发送业务信息时：通信控制模块、信号处理模块和M个射频模块组成M条反向通信链路，保证通信。本发明能够提高散射通信系统的通信可靠性。
The present invention provides a scattering communication system. The scattering communication system is applied to the communication between an external service terminal and an external communication target, and the system includes a communication control module and a signal processing module connected in sequence, and also includes M radio frequency modules respectively connected to the signal processing module, M≥2; when the external service terminal sends service information to the external communication target, the communication control module, the signal processing module and the M radio frequency modules form M forward communication links to ensure communication; when the external communication target sends service information to the external service terminal: the communication control module, the signal processing module and the M radio frequency modules form M reverse communication links to ensure communication. The present invention can improve the communication reliability of the scattering communication system.
Description
Technical Field
The invention relates to the technical field of scattering communication, in particular to a scattering communication system.
Background
With the continuous development of technology, governments, armies and the like have extremely high requirements on reliable and stable transmission of communication networks, and a large number of active communication means such as satellite communication, microwave communication, scattering communication and the like exist in the market at present, wherein communication equipment mainly used for scattering communication is most widely applied. Most of the existing scattering communication devices comprise only one scattering link, and the communication reliability is low.
Disclosure of Invention
The embodiment of the invention provides a scattering communication system, which aims to solve the problems that the existing scattering communication equipment mainly comprises only one scattering link and the communication reliability is low.
In a first aspect, an embodiment of the present invention provides a scattering communication system, which is applied to communication between an external service terminal and an external communication target, where the system includes a communication control module and a signal processing module that are sequentially connected, and further includes M radio frequency modules that are respectively connected with the signal processing module, where M is greater than or equal to 2;
when an external service terminal transmits service information to an external communication destination:
the communication control module is used for receiving the first service information sent by the external service terminal and sending the first service information to the signal processing module;
The signal processing module is used for sequentially carrying out channel multiplexing and modulation on the first service information to obtain M first service digital signals, and transmitting the M first service digital signals to the M radio frequency modules in a one-to-one correspondence manner;
For each radio frequency module, the radio frequency module is used for performing digital-to-analog conversion and frequency mixing on the received first service digital signal to obtain a first radio frequency signal corresponding to the radio frequency module, and sending the first radio frequency signal to an external communication target corresponding to the radio frequency module;
when an external communication target transmits service information to an external service terminal:
for each radio frequency module, the radio frequency module is further used for receiving a second radio frequency signal sent by an external communication target, carrying out frequency mixing and analog-to-digital conversion on the second radio frequency signal to obtain a second service digital signal corresponding to the radio frequency module, and sending the second service digital signal to the signal processing module;
The signal processing module is also used for sequentially demodulating and channel tapping the received M second service digital signals to obtain second service information, and sending the second service information to the communication control module;
and the communication control module is also used for sending the second service information to the external service terminal.
In one possible implementation manner, each radio frequency module comprises a signal conversion unit and a frequency converter which are sequentially connected;
when an external service terminal transmits service information to an external communication destination:
The signal conversion unit is used for performing digital-to-analog conversion on the received first service digital signal to obtain a first service analog signal, and transmitting the first service analog signal to the corresponding frequency converter;
And the frequency converter is used for mixing the received first service analog signals to obtain first radio frequency signals and sending second service digital signals to the signal processing module.
In one possible implementation manner, each radio frequency module comprises a signal conversion unit and a frequency converter which are sequentially connected;
when an external communication target transmits service information to an external service terminal:
the frequency converter is used for receiving a second radio frequency signal sent by an external communication target and mixing the second radio frequency signal to obtain a second service analog signal;
The signal conversion module is used for carrying out analog-to-digital conversion on the second service analog signal to obtain a second service digital signal, and sending the second service digital signal to the signal processing module.
In one possible implementation, the signal processing module includes a multiplexing unit and a modem unit that are sequentially connected;
when an external service terminal transmits service information to an external communication destination:
The multiplexing unit is used for carrying out channel multiplexing on the first service information to obtain a first service signal and sending the first service signal to the modulation-demodulation unit;
the modulation and demodulation unit is used for modulating the first service signals to obtain M first service digital signals, and transmitting the M first service digital signals to the M radio frequency modules in a one-to-one correspondence manner;
when an external communication target transmits service information to an external service terminal:
the modulation and demodulation unit is also used for demodulating the received N second service digital signals to obtain second service signals, and sending the second service signals to the multiplexing unit, wherein N is less than or equal to M;
And the multiplexing and demultiplexing unit is also used for channel demultiplexing the second service signal to obtain second service information and transmitting the second service information to the communication control module.
In one possible implementation, the signal processing module includes M multiple taps units and M modem units; the M multiplexing units are connected with the M modulation and demodulation units in a one-to-one correspondence mode, and the M modulation and demodulation units are connected with the M radio frequency modules in a one-to-one correspondence mode.
In one possible implementation, the communication control module includes a communication controller and a switch connected in sequence;
when an external service terminal transmits service information to an external communication destination:
The communication controller is used for receiving the first service information sent by the external service terminal and sending the first service information to the switch;
the switch is used for sending the first service information to the signal processing module through P channels; wherein P is more than or equal to 2.
In one possible implementation, the communication control module includes a communication controller and a switch connected in sequence;
when an external communication target transmits service information to an external service terminal:
The switch is used for receiving the second service information through the P channels and sending the second service information to the communication controller; wherein P is more than or equal to 2;
and the communication controller is used for sending the second service information to the external service terminal.
In one possible implementation, the system further includes Q communication input interfaces and Q communication output interfaces in one-to-one correspondence with the Q communication input interfaces; the Q communication input interfaces are respectively used for being connected with Q external communication devices, and the Q communication output interfaces are respectively used for being connected with Q external communication targets;
Q communication input interfaces are respectively connected with the input end of the communication control module, and Q communication output interfaces are respectively connected with the output end of the communication control module.
In one possible implementation, the Q communication input interfaces and the Q communication output interfaces are each preset with the same communication priority.
In one possible implementation, the communication control module is further configured to determine a target communication input interface based on the communication priority, and control the target communication input interface and a communication output interface corresponding to the target communication input interface to operate.
The embodiment of the invention provides a scattering communication system which is applied to communication between an external service terminal and an external communication target, and comprises a communication control module and a signal processing module which are sequentially connected, and M radio frequency modules which are respectively connected with the signal processing module, wherein M is more than or equal to 2, and M communication links are formed. The method can realize the transmission of the service information between the external service terminal and the external communication target through M communication links, realize space diversity, improve the transmission reliability of the service information, reduce the loss risk and improve the working reliability of the scattering communication system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first scattering communication system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second scattering communication system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a third scattering communications system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a fourth scattering communications system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a peer-to-peer communication mode according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a point-to-two point communication mode according to an embodiment of the present invention.
Detailed Description
In order to make the present solution better understood by those skilled in the art, the technical solution in the present solution embodiment will be clearly described below with reference to the accompanying drawings in the present solution embodiment, and it is obvious that the described embodiment is an embodiment of a part of the present solution, but not all embodiments. All other embodiments, based on the embodiments in this solution, which a person of ordinary skill in the art would obtain without inventive faculty, shall fall within the scope of protection of this solution.
The term "comprising" in the description of the present solution and the claims and in the above-mentioned figures, as well as any other variants, means "including but not limited to", intended to cover a non-exclusive inclusion, and not limited to only the examples listed herein. Furthermore, the terms "first" and "second," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
The implementation of the invention is described in detail below with reference to the specific drawings:
Fig. 1 is a schematic structural diagram of a first scattering communication system according to an embodiment of the present invention. Referring to fig. 1, the scattering communication system 10 is applied to communication between an external service terminal 20 and an external communication target 30, the system 10 comprises a communication control module 101 and a signal processing module 102 which are sequentially connected, and also comprises M radio frequency modules 103 which are respectively connected with the signal processing module, wherein M is larger than or equal to 2;
when the external service terminal 20 transmits service information to the external communication target 30:
The communication control module 101 is configured to receive the first service information sent by the external service terminal 20, and send the first service information to the signal processing module 102.
Alternatively, the communication targets 30 may be communication devices such as an external power amplifier, and the number of the communication targets 30 may be M. The transmission of the service information by the service terminal 20 to the communication destination 30 may be expressed as forward transmission. The first service information may be useful information that the user wants to transmit through the service terminal 20, such as video information or voice information, etc. The communication control module 101 is configured to forward the first service information to the signal processing module 102 through P channels.
The signal processing module 102 is configured to sequentially perform channel multiplexing and modulation on the first service information to obtain M first service digital signals, and send the M first service digital signals to the M radio frequency modules 103 in a one-to-one correspondence manner.
Optionally, the information in the P channels exists in the form of a digital signal, and the signal processing module performs channel multiplexing, that is, digital multiplexing, on the information in the P channels to obtain the first service signal. And then, carrying out multi-frequency modulation on the first service signals to obtain M first service digital signals, namely modulating the first service signals into M first service digital signals, so as to realize the space diversity of the signals. Although the frequencies of the first service digital signals are different, the information contained in the first service digital signals is the same, that is, the baseband signals of the first service digital signals are the same, and the first service digital signals can be considered to be the same.
For each radio frequency module, the radio frequency module is used for performing digital-to-analog conversion and frequency mixing on the received first service digital signal to obtain a first radio frequency signal corresponding to the radio frequency module, and sending the first radio frequency signal to an external communication target corresponding to the radio frequency module.
Optionally, the M radio frequency modules 103 include a radio frequency module 1, a radio frequency module 2, a third party, and a radio frequency module M. Each radio frequency module correspondingly receives a first service digital signal, performs digital-to-analog conversion on the first service digital signal to obtain a first service analog signal, mixes the first service analog signal to obtain a first radio frequency signal, and finally sends the first radio frequency signal to the communication target 30.
Optionally, the M radio frequency modules may send M first radio frequency signals to the same communication target, or may respectively send one communication target, where the first radio frequency signals are the same and indicate that the carried service information is the same.
Each radio frequency module respectively mixes the first service digital signals received by each radio frequency module, and mixes the first digital service signals with different frequencies to obtain the identical first radio frequency signals.
For example, the first service digital signal received by the radio frequency module 1 is a first frequency; the first service digital signal received by the radio frequency module 2 is a second frequency. The frequency points of the first radio frequency signal obtained by the frequency mixing of the radio frequency module 1 and the second radio frequency signal obtained by the frequency mixing of the radio frequency module 2 are identical.
For example, the number of communication targets is M, and each radio frequency module may correspond to one communication target, and may send the first radio frequency signal of the radio frequency module to the communication target.
When the external communication target 30 transmits service information to the external service terminal 20:
For each radio frequency module, the radio frequency module is further configured to receive a second radio frequency signal sent by an external communication target, mix and perform analog-to-digital conversion on the second radio frequency signal to obtain a second service digital signal corresponding to the radio frequency module, and send the second service digital signal to the signal processing module.
Alternatively, the communication destination 30 transmits service information to the service terminal 20, that is, the service terminal 30 receives the service information transmitted by the communication destination 30, which is denoted as reverse reception. The second rf signal transmitted by the communication target 30 may be a feedback rf signal transmitted in response to the first rf signal, or may be an rf signal transmitted separately according to its own situation, for example, an rf signal including voice information or video information.
For each radio frequency module, the radio frequency module is further configured to mix the second radio frequency signal to obtain a second service analog signal, and then perform analog-to-digital conversion on the second service analog signal to obtain a second service digital signal. The second service digital signals of each radio frequency module contain the same information, namely the baseband signals of the second service digital signals are the same, but the frequencies are different. Finally, all the second service digital signals are sent to the signal processing module 102. By transmitting a plurality of second service signals including the same information to the signal processing module 102, respectively, the reliability of information transmission can be improved compared to a communication mode having only one link.
The signal processing module 102 is further configured to sequentially demodulate and channel-tap the received M second service digital signals to obtain second service information, and send the second service information to the communication control module.
Optionally, the signal processing module 102 demodulates the M second service digital signals respectively, obtains a second service signal including the second service information transmitted by the communication target 30 according to the baseband signal therein, then performs channel tapping on the second service signal to obtain second service information, and sends the second service information to the communication control module 101 through P channels.
The communication control module 101 is further configured to send the second service information to the external service terminal 20.
Optionally, the communication control module 101 is further configured to send second service information including information that the communication target wants to transfer to the service terminal 20.
According to the embodiment of the invention, the plurality of scattering transmission links are constructed between the service terminal 20 and the communication target 30, so that the space diversity of information transmission can be realized, the transmission reliability of service information is greatly improved, the loss risk is reduced, and the working reliability of a scattering communication system is improved.
Referring to fig. 2, a schematic structural diagram of a second scattering communication system according to an embodiment of the present invention is shown.
In some embodiments of the present invention, as shown in fig. 2, each radio frequency module includes a signal conversion unit and a frequency converter connected in sequence; for example, the radio frequency module 1 includes a signal conversion unit 1 and a frequency converter 1 connected in sequence, and the radio frequency module M includes a signal conversion unit M and a frequency converter M connected in sequence;
Taking the rf module 1 as an example for illustration, other rf modules are the same as follows:
when the external service terminal 20 transmits service information to the external communication target 30:
The signal conversion unit 1 is configured to perform digital-to-analog conversion on the received first service digital signal to obtain a first service analog signal, and send the first service analog signal to the corresponding frequency converter 1;
The frequency converter 1 is configured to mix the received first service analog signal to obtain a first radio frequency signal 1, and send a second service digital signal to the signal processing module 102;
when the external communication target 30 transmits service information to the external service terminal 20:
The frequency converter 1 is configured to receive a second radio frequency signal sent by the external communication target 30, and mix the second radio frequency signal to obtain a second service analog signal;
the signal conversion module 1 is configured to perform analog-to-digital conversion on the second service analog signal to obtain a second service digital signal, and send the second service digital signal to the signal processing module 102.
Alternatively, the first service analog signal and the second service analog signal may be intermediate frequency signals, and the signal conversion module 1 may implement analog-to-digital conversion and digital-to-analog conversion.
When the external service terminal 20 transmits service information to the external communication target 30, the frequency converter 1 may mix the first service analog signal with the high local oscillator source to obtain a required first radio frequency signal, and transmit the first radio frequency signal to the communication target 30.
When the external communication target 30 sends service information to the external service terminal 20, the frequency converter 1 may mix the second radio frequency signal with the high local oscillator source to obtain a required second service analog signal, and send the second service analog signal to the signal conversion module 1.
As shown in fig. 2, in some embodiments of the present invention, the signal processing module 102 includes a demultiplexing unit 1021 and a modem unit 1022 that are connected in sequence;
when the external service terminal 20 transmits service information to the external communication target 30:
A multiplexing unit 1021, configured to perform channel multiplexing on the first service information, obtain a first service signal, and send the first service signal to a modem unit 1022;
The modem 1022 is configured to modulate the first service signals to obtain M first service digital signals, and send the M first service digital signals to the M radio frequency modules 103 in a one-to-one correspondence;
when the external communication target 30 transmits service information to the external service terminal 20:
The modem unit 1022 is further configured to demodulate the received N second service digital signals to obtain second service signals, and send the second service signals to the multiplexing unit 1021, where N is less than or equal to M;
The demultiplexing unit 1021 is further configured to perform channel demultiplexing on the second service signal to obtain second service information, and send the second service information to the communication control module 101.
Alternatively, when the external service terminal 20 transmits service information to the external communication destination 30, the modem unit 1022 may modulate the first service signal to obtain M first service digital signals containing the same information but different frequency points.
For example, when M is 2, the first service signal may be modulated with four frequency points centered on a certain center frequency, and the obtained first service digital signal may be sent to the radio frequency module 1; the first service signal is modulated by two other frequency points, and the obtained first service digital signal is sent to the radio frequency module 2, which is equivalent to two paths of same signals to be respectively transmitted, so that the radio frequency module 1 and the radio frequency module 2 can be used for transmitting the first radio frequency signal through the same radio frequency points, and space diversity and frequency diversity effects are realized.
Illustratively, the multiplexing is to multiplex low-speed signals such as traffic and voice, and the data after multiplexing is a baseband signal of a specific frame structure.
Optionally, the M radio frequency modules are M scattering links, where the M scattering links are independent of each other, and may or may not work simultaneously. In simultaneous operation, the modem unit 1022 may receive M second traffic digital signals. When not operating simultaneously, the modem unit 1022 may receive N second service digital signals, n+.m.
For the N second service digital signals received, the modem 1022 may directly add and sum the signals, and then perform demodulation and decoding.
As shown in fig. 2, in some embodiments of the present invention, the communication control module 101 includes a communication controller 1011 and a switch 1012 connected in sequence;
when the external service terminal 20 transmits service information to the external communication target 30:
A communication controller 1011 for receiving the first service information transmitted from the external service terminal 20 and transmitting the first service information to the switch 1012;
A switch 1012 for transmitting the first service information to the signal processing module 102 through P channels; wherein P is more than or equal to 2;
when the external communication target 30 transmits service information to the external service terminal 20:
a switch 1012 for receiving the second service information through the P channels and transmitting the second service information to the communication controller 1011; wherein P is more than or equal to 2;
the communication controller 1011 is configured to transmit the second service information to the external service terminal 20.
Referring to fig. 3, a schematic structural diagram of a third scattering communication system according to an embodiment of the present invention is shown.
In some embodiments of the present invention, as shown in fig. 3, the system further includes Q communication input interfaces and Q communication output interfaces in one-to-one correspondence with the Q communication input interfaces; the Q communication input interfaces are respectively used for being connected with Q external communication devices, and the Q communication output interfaces are respectively used for being connected with Q external communication targets;
q communication input interfaces are respectively connected to the input end of the communication control module 101, and Q communication output interfaces are respectively connected to the output end of the communication control module 101.
Optionally, the Q communication output interfaces are respectively used for Q external communication target connections different from the communication target 30, that is, the service terminal may perform communication of service information with the communication target 30, which belongs to scatter communication. The communication device 1 and the third communication device Q is a communication device different from scatter communication, for example, may be a covered wire, a microwave, a radio station, and other communication devices, and by expanding a communication interface in the communication control module 101, functions mainly including scatter communication and auxiliary communication means may be realized, so that when scatter communication cannot be used, information exchange may be realized by using the other communication means, and reliability of information transmission may be greatly improved.
To ensure scatter-based communication, in some embodiments of the present invention, the Q communication input interfaces and the Q communication output interfaces are each preset with the same communication priority.
In addition, the communication control module 101 is further configured to determine a target communication input interface based on the communication priority, and control the target communication input interface and a communication output interface corresponding to the target communication input interface to operate.
Optionally, the interface corresponding to the service terminal 20 is also provided with a communication priority, and the communication priority corresponding to the service terminal 20 may be set to be the highest.
For example, a priority (0-7 level) may be preset for each communication interface, and a priority queue or a weighted fair queue may be used to ensure that resources are preferentially used for high-priority service. In order to ensure high-speed transmission under long distance, the device sets scattering communication as main communication means and other communication means such as covered wires, microwaves, radio stations and the like as auxiliary communication means.
According to the embodiment of the invention, the communication controller is used for giving priority to wired or wireless according to the requirements of a user, and the communication mode is given priority under the same communication distance, so that the communication mode is selected to be communication in motion or communication in static state. In the actual use process, the communication controller realizes the functions mainly of scattering communication through configuration.
Optionally, the signal conversion unit, the frequency converter, the multiplexing unit, the modem unit, the communication controller and the switch in the scattering communication system according to the embodiment of the present invention may be standard VPX (Virtual Private Exchange) devices. The communication system can also reserve the VPX standard slot, namely, other communication means plug-ins can be expanded structurally, and the selection of various communication means can be realized inside the communication system.
Specifically, other communication devices in service can be used to directly connect to a communication controller, a switch, etc. The communication controller and the switch adopt an extensible elastic framework on software, and the modules are in loose coupling relation, so that the purposes of user 'service multi-network protection, resource use as required and flexible network control' are met, multi-communication network access is realized, the flexibility of equipment is improved, and the robustness of a communication system is improved.
The embodiment of the invention adopts a layer of routing control on the basis of keeping three layers of routing functions, so that the equipment with independent IP routing organization relationship is directly integrated, the strategy routing algorithm is utilized, the multi-means intelligent scheduling is realized, the flexibility of the equipment is improved, and the robustness of the equipment is improved.
Specifically, the communication system adds a layer of routing control on the basis of reserving three layers of routing functions, and can realize the strategy routing of the service of the software at the application layer. The policy routing algorithm combines the dynamic routing table and the link detection state to calculate the current optimal forwarding link of the service. The dynamic routing table may be derived from different routing protocols such as RIP, OSPF. The link probing state is derived from a link probing module comprising: packet loss rate, average delay jitter, channel bandwidth, and bit error rate.
The communication control module can compare the adaptive channel and the switching threshold configured according to the service policy with the corresponding link states according to the sequence. If only links meeting the service threshold requirement exist, the uplink is sent to the routing forwarding module to execute specified routing matching; and if the link meeting the service threshold requirement does not exist, the link is uploaded to the routing forwarding module to execute the longest matching rule.
Referring to fig. 4, a schematic structural diagram of a fourth scattering communication system according to an embodiment of the present invention is shown.
In some embodiments of the present invention, as shown in fig. 3, the signal processing module 102 includes M multiple taps units and M modem units; the M multiplexing units are connected with the M modulation and demodulation units in a one-to-one correspondence mode, and the M modulation and demodulation units are connected with the M radio frequency modules in a one-to-one correspondence mode.
Optionally, when the signal processing module 102 includes M multiplexing units and M modem units, the number of service terminals is also M.
In the embodiment of the present invention, when the signal processing module includes only one multiplexing unit and one modulation and demodulation unit and is combined with one service terminal, a mode of implementing transmission of service information through M scattering links is referred to as a point-to-point communication mode, for example, fig. 2. The signal processing module includes M multiplexing units and M modem units, and when combining with M service terminals, the transmission mode of the service information is implemented through M scattering links, which is called a point-to-multipoint communication mode, for example, fig. 3.
Referring to fig. 5, a schematic diagram of a peer-to-peer communication mode according to an embodiment of the present invention is shown; referring to fig. 6, a schematic diagram of a point-to-two point communication mode according to an embodiment of the present invention is shown.
Illustratively, when m=2, the scattering communication system is composed of two paths of scattering links, that is, space diversity can be utilized through point-to-point communication, so that the scattering communication system has a longer communication distance at the same communication rate. And the superposition of the communication rate can be realized through the point-to-two-point communication, so that the communication rate is doubled under the condition of the same communication distance.
The communication control module is interconnected with the switch through 2 GE (Gigabit Ethernet) interfaces, and can be divided into a service channel and a control channel. The service channels can be connected in series with a security machine to forward service data, and the control channel can forward control data.
As shown in fig. 5, in the peer-to-peer communication mode, a service terminal, a multiplexing unit, a modem unit, two signal conversion units, two frequency converters, a communication controller, a switch, and two communication targets are applied to realize information transmission.
In forward transmission, the service terminal transmits the transmitted signal to the multiplexing module through the communication controller and the switch, and the multiplexed data is transmitted to the modem unit through an LVDS (Low Voltage DIFFERENTIAL SIGNALING) interface between the multiplexing module and the signal processing module.
The modulation is performed in the modem unit, and the modulated signal is transmitted to the signal converting unit 1 and the signal converting unit 2 through the LVDS or GXB interface.
The signal conversion unit 1 performs digital-to-analog conversion, the converted intermediate frequency analog signal is sent to the frequency converter 1, the frequency converter 1 mixes the input intermediate frequency signal with a high local oscillator source to obtain a required radio frequency signal, and the radio frequency signal is transmitted to the communication target 1.
The signal conversion unit 2 performs digital-to-analog conversion, the converted intermediate frequency analog signal is sent to the frequency converter 2, the frequency converter 2 mixes the input intermediate frequency signal with a high local oscillator source to obtain a required radio frequency signal, and the radio frequency signal is transmitted to the communication target 2.
During reverse receiving, the frequency converter 1 and the frequency converter 2 carry out the received radio frequency signals and the high local oscillation to obtain two identical intermediate frequency signals, and the two intermediate frequency signals are respectively sent to the signal conversion unit 1 and the signal conversion unit 2. And respectively performing analog-digital conversion, respectively transmitting the digital signals after analog-digital conversion in the signal conversion unit 1 and the signal conversion unit 2 to a modulation and demodulation unit through LVDS or GXB, demodulating intermediate frequency signals with different frequencies in the modulation and demodulation unit, and the like, wherein the demodulated signals enter a multiple tapping unit to realize a tapping function, and the tapped data are transmitted to a service terminal through a switch and a communication controller.
In the point-to-point communication mode, the contents of the signals transmitted by the modem units to the signal converting unit 1 and the signal converting unit 2 are identical. Specifically, the modulation signal transmitted by the modulation and demodulation unit is transmitted to the signal conversion unit 1 by four frequency points with a certain center frequency as the center, wherein two frequency points are transmitted to the signal conversion unit 2 through the LVDS or GXB interface, and the other two frequency points are transmitted. The frequency points of the radio frequency signals generated by the frequency converter 1 and the frequency conversion ground 2 are the same.
In the point-to-point communication mode, the scattering communication system processes the service information of the service terminal into the identical radio frequency signal 1 and the identical radio frequency signal 2, and respectively sends the radio frequency signal 1 to the communication target 1 and sends the radio frequency signal 2 to the communication target 2.
The service terminal divides the service information into two identical radio frequency signals and sends the two identical radio frequency signals to the communication target 1 and the communication target 2 respectively.
As shown in fig. 6, in the point-to-two-point communication mode, two service terminals, two multiplexing units, two modulation and demodulation units, two signal conversion units, two frequency converters, one communication controller, one switch, and two communication targets are applied to realize information transmission.
In forward transmission, the service terminals 1 and 2 are connected to a communication controller, and differentiation between the service terminals 1 and 2 is achieved through the communication controller, the switch, and through routing control.
The service information 1 is sent to the multiplexing unit 1 and the service information 2 is sent to the multiplexing unit 2. The multiplexing units 1 and 2 multiplex the received service information, respectively.
The multiplexing unit 1 transmits the multiplexed data to the modem unit 1 through the LVDS interface between the multiplexing unit 1 and the modem unit 1. The multiplexing unit 2 transmits the multiplexed data to the modem unit 2 through the LVDS interface between the multiplexing unit 2 and the modem unit 2.
Modulation is performed in the modem unit 1 and the modem unit 2, digital-to-analog conversion is performed in the signal conversion unit 2 and the signal conversion unit 1, respectively, and the baseband signal is converted into an intermediate frequency signal and sent to the corresponding frequency converter 1 and frequency converter 2, respectively.
The signal conversion unit 1 performs digital-to-analog conversion, the converted intermediate frequency analog signal is sent to the frequency converter 1, the frequency converter 1 mixes the input intermediate frequency signal with a high local oscillator source to obtain a required radio frequency signal, and the radio frequency signal is transmitted to the communication target 1.
The signal conversion unit 2 performs digital-to-analog conversion, the converted intermediate frequency analog signal is sent to the frequency converter 2, the frequency converter 2 mixes the input intermediate frequency signal with a high local oscillator source to obtain a required radio frequency signal, and the radio frequency signal is transmitted to the communication target 2.
During reverse reception, the frequency converter 1 and the frequency converter 2 perform the received radio frequency signal and the high local oscillator to obtain two identical intermediate frequency signals, and the two intermediate frequency signals are respectively sent to the signal conversion unit 1 and the signal conversion unit 2 and are respectively subjected to analog-to-digital conversion.
The signal conversion unit 1 sends the signal after analog-to-digital conversion to the modem unit 1, the modem unit 1 sends the demodulated signal to the multiplexing unit 1 for multiplexing, and sends the service information 1 to the service terminal 1 through the switch and the communication controller.
The signal conversion unit 2 sends the signal after analog-to-digital conversion to the modem unit 2, the modem unit 2 sends the demodulated signal to the multiplexing unit 2 for multiplexing, and the service information 2 is sent to the service terminal 2 through the switch and the communication controller.
In the point-to-two communication mode, the frequency points of the radio frequency signals emitted by the frequency converter 1 and the frequency converter 2 are different.
In a point-to-two point communication mode, the scattering communication system processes the service information 1 of the service terminal 1 into a radio frequency signal 1 and sends the radio frequency signal 1 to a communication target 1; the service information 2 of the service terminal 2 is processed into a radio frequency signal 2 and the radio frequency signal 2 is transmitted to the communication destination 2.
The scattering communication system of the embodiment of the invention has the technical advantages of simple use, easy expansion, better realization of flow dispatching and path optimization, application-driven network service provision, key service quality guarantee, line cost reduction, user personalized design satisfaction and the like. The appropriate communication rate may be selected based on the signal-to-noise ratio of the channel. The communication means of the maximum communication capacity can be selected according to the channel capacity. The communication means may be prioritized according to the need. Performing primary frequency conversion in a modulation and demodulation module, and converting a baseband signal into an intermediate frequency signal; and the input intermediate frequency signal and the high local oscillator frequency mixing outgoing frequency signal in the frequency converter are subjected to secondary frequency conversion, and the radio frequency signal can be directly output through the secondary frequency conversion.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
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| CN101815044A (en) * | 2009-02-20 | 2010-08-25 | 北京东方信联科技有限公司 | Method for realizing Ethernet data access transmission |
| CN112653484A (en) * | 2020-12-29 | 2021-04-13 | 中国电子科技集团公司第五十四研究所 | Miniaturized wireless communication equipment with dual-mode system capable of carrying out microwave scattering |
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| CN1728596A (en) * | 2004-07-29 | 2006-02-01 | 上海模斯电子设备有限公司 | Digital wireless communication system of tropospheric scatter |
| JP5896392B2 (en) * | 2012-04-20 | 2016-03-30 | ▲ホア▼▲ウェイ▼技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Apparatus and method for communication correction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101815044A (en) * | 2009-02-20 | 2010-08-25 | 北京东方信联科技有限公司 | Method for realizing Ethernet data access transmission |
| CN112653484A (en) * | 2020-12-29 | 2021-04-13 | 中国电子科技集团公司第五十四研究所 | Miniaturized wireless communication equipment with dual-mode system capable of carrying out microwave scattering |
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