CN101202561B - System and method for searching signal - Google Patents
System and method for searching signal Download PDFInfo
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- CN101202561B CN101202561B CN200710302319XA CN200710302319A CN101202561B CN 101202561 B CN101202561 B CN 101202561B CN 200710302319X A CN200710302319X A CN 200710302319XA CN 200710302319 A CN200710302319 A CN 200710302319A CN 101202561 B CN101202561 B CN 101202561B
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Abstract
The invention proposes a signal searching system and the method thereof, which is used for searching the WiMAX signals of a plurality of frequency bands; wherein, the signal searching method includes the following steps: Step S302, receiving the WiMAX signals of the frequency bands and switching between the WiMAX signals of the frequency bands to select the WiMAX signals; step S304, converting the selected WiMAX signals into zero intermediate frequency signals and carrying out automatic searching to the frequency bands and frequency points of the zero intermediate frequency; and step S306, treating the searched zero intermediate frequency signals and displaying the relevant information of the treated zero intermediate frequency signals. The relevant information of the zero intermediate frequency displayed on a display module at least includes one of the following information: frequency band information, frequency point information and intensity information.
Description
Technical field
The present invention relates to the communications field, relate in particular to the signals search system and the method for a kind of WiMAX of being used for (WorldwideInteroperability for Microwave Access, World Interoperability for Microwave Access, WiMax) system.
Background technology
Along with continuous growth for the demand of wireless access internet, in recent years based on OFDMA (Orthogonal Frequency Division Multiple Access, the rise of the WiMAX network technology OFDM access), the mobile WiMAX technology progressively moves to maturity, having more high performance system equipments such as MIMO (Multiple Input Multiple Output, multiple-input and multiple-output) technology and each Terminal Type has begun to apply.Equipment by WiMAX network insertion internet mainly contains notebook computer, desktop computer, and mobile hand-held device etc., and its access way has PC card, modulator-demodulator, and the module etc. of WiMAX function.
In mobile WiMAX system, be such for the frame structure of the OFDM of time division duplex (Time Division Duplex, be called for short TDD), each frame is divided into the uplink and downlink subframe and is separated to guarantee the phase mutual interference between uplink and downlink signals by the transmitting-receiving time slot.First symbol is a lead code in descending sub frame, is used for system synchronization, and its power is more thereafter all symbol height.This also is convenient to receive its detection.
At present the countries in the world WiMAX frequency range of having disposed and will dispose has 2.5GHz, 3.5GHz, and three frequency ranges such as 5GHz substantially.
Since the WiMAX technical development, its testing equipment, especially a measurement equipment is just under development, only is useful on the testing equipment of research and development WiMAX terminal at present, complex structure, and corresponding operating system and analysis software support, cost height, complicated operation are arranged.
Based on above analysis reason, in present stage, distribution for the layout of WiMAX cellular network, optimization, frequency range, in the use of terminal, installation, maintenance process, press for a kind of low-cost device of searching for, seek and detecting multiband WiMAX base station signal fast, easily and be used as a kind of aid.
Known a kind of portable terminal and network search method thereof make and support that the portable terminal of a plurality of frequency ranges can successful apace registered network.In the method, in portable terminal, preserved the corresponding relation of network No. and frequency range in advance, when this portable terminal needs registered network,, inquired about the pairing frequency range of this network No., search network in the frequency range that finds according to network No. and this corresponding relation of need search.Wherein, needing the network No. of search is the network No. of the preceding network that once successfully lands, or the network No. of the pairing mobile communication carrier of SIM card of this portable terminal.Network No. according to the frequency range book of final entry mobile communication carrier that mobile communication carrier supported.If portable terminal does not inquire corresponding frequency range, then this portable terminal search network in all frequency ranges of its support.
The also system of selection of the autoband of known a kind of multiband terminal, in the method, when international roaming, portable terminal detects country and network code from system information, and searches for frequency range from the band information tabulation.The searching method of this autoband can reduce the frequency search time, and network registration can be finished faster, has avoided the waste of battery electric quantity accordingly.
More than two kinds of methods all be based on the method for portable terminal auto-band in multiband is used.
Summary of the invention
In view of above one or more problems, the present invention proposes a kind of signals search system and method, introduce multiband WiMAX signal search, checkout gear and corresponding method that a kind of WiMAX of utilization special-purpose radio-frequency integrated circuit circuit is realized, can break away from PC fully and independent work reliably.
Signals search system according to an aspect of the present invention is used for the WiMAX signal of a plurality of frequency ranges is searched for, this system comprises: multiband aerial module 102, be used to receive the WiMAX signal of a plurality of frequency ranges, and the WiMAX signal of a plurality of frequency ranges is sent to the multiband handover module; Multiband handover module 106 is used under the control of microcontroller the WiMAX signal of a plurality of frequency ranges being switched to the corresponding interface of radio-frequency module; Radio-frequency module 108, the WiMAX conversion of signals that is used for a plurality of frequency ranges that will receive is a zero intermediate frequency signals, and under the control of microcontroller, zero intermediate frequency signals is carried out the automatic search of frequency range and frequency, and the zero intermediate frequency signals that is searched is sent to the microcontroller module; Microcontroller module 110 is used to control multiband handover module, radio frequency integrated circuit, and display module, and is used for the zero intermediate frequency signals that searches is handled and treated zero intermediate frequency signals is sent to display module; And display module 112, be used under the control of microcontroller module showing the relevant information of treated zero intermediate frequency signals.
Wherein, signals search system also comprises: antenna matching network 104, be connected between multiband aerial module and the multiband handover module, be used for multiband aerial module and multiband handover module are mated, so that the maximise transmission efficiency of the WiMAX signal of a plurality of frequency ranges.
Multiband aerial module 102 be dipole antenna, multipole antenna, microstrip antenna, and dielectric antenna in a kind of.∏ type network or Γ type network that antenna matching network 104 is formed for inductance capacitance.Microcontroller module 110 is the inner microcontroller that is integrated with A/D change-over circuit and memory.Display module 112 is LCD or light-emitting diode.The relevant information of the zero intermediate frequency that shows on display module comprises following at least a information: band information, frequency point information, and strength information.
Signal search method according to another aspect of the present invention is used for the WiMAX signal of a plurality of frequency ranges is searched for, method may further comprise the steps: step S302, receive the WiMAX signal of a plurality of frequency ranges, and between the WiMAX of a plurality of frequency ranges signal, switch to select the WiMAX signal; Step S304 is a zero intermediate frequency signals with selected WiMAX conversion of signals, and zero intermediate frequency signals is carried out the automatic search of frequency range and frequency; And step S306, the zero intermediate frequency signals that searches is handled and is shown the relevant information of treated zero intermediate frequency signals.The relevant information of the zero intermediate frequency that shows on display module comprises following at least a information: band information, frequency point information, and strength information.
By the present invention, multiband WiMAX signal search, checkout gear and corresponding method that a kind of WiMAX of utilization special-purpose radio-frequency integrated circuit circuit is realized have been introduced, can break away from PC fully and independent work reliably, have flexible to operation, the advantage that cost is low.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the block diagram of the structure of signals search system according to an embodiment of the invention;
Fig. 2 is the waveform schematic diagram of the signal handled according to an embodiment of the invention;
Fig. 3 is the flow chart of signal search method according to an embodiment of the invention;
Fig. 4 is the flow chart of signal search method according to another embodiment of the invention; And
Fig. 5 is the method flow diagram of automatic search of multiband WiMAX signal according to an embodiment of the invention and demonstration.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
System and method only works in the physical layer of WiMAX signal according to an embodiment of the invention, only the zero intermediate frequency signals after the down-conversion is handled, not to the complicated algorithm of base band signal process, according to the high characteristics of downstream signal leading symbol power ratio data symbol in the WiMAX network, it is detected, and circuit structure is comparatively simple.
Fig. 1 is the block diagram of the structure of signals search system according to an embodiment of the invention.As shown in Figure 1, this system adopts the multiband WiMAX signal search and the detection of radio frequency integrated circuit, and this system comprises:
Multiband aerial module (multiband aerial) 102 is used to receive the WiMAX signal of a plurality of frequency ranges, and the WiMAX signal of a plurality of frequency ranges is sent to the multiband handover module.The modes of emplacement of antenna comprises internal or external antenna, the multiband aerial module be dipole antenna, multipole antenna, microstrip antenna, and dielectric antenna in a kind of, gain is not less than 0dBi, can adopt the form or the directed form of omnidirectional.
Multiband handover module (multiband diverter switch) 106 is used under the control of microcontroller the WiMAX signal of a plurality of frequency ranges being switched to the corresponding interface of radio-frequency module.Put with hilted broadsword is two for two-band, put switch with hilted broadsword three for three frequency ranges.
Radio-frequency module (radio frequency integrated circuit) 108, the WiMAX conversion of signals that is used for a plurality of frequency ranges that will receive is a zero intermediate frequency signals, promptly, being used to finish signal amplifies, down-conversion, frequency synthesis, and under the control of microcontroller, zero intermediate frequency signals is carried out the automatic search of frequency range and frequency, and the zero intermediate frequency signals that is searched is sent to the microcontroller module.Can adopt the radio frequency integrated circuit of BCSR200-1 two-band of 2300R three frequency range WiMAX transceiving chips, the BECEEM of intel.
Microcontroller module (microcontroller) 110 is used to control multiband handover module, radio frequency integrated circuit, and display module, and is used for the zero intermediate frequency signals that searches is handled and treated zero intermediate frequency signals is sent to display module.Available inside is integrated with the microcontroller of A/D conversion and memory.
Display module (display) 112 is used under the control of microcontroller module showing the relevant information of treated zero intermediate frequency signals.Relevant information comprises following at least a information: band information, frequency point information, and strength information.Can adopt display unit such as LCD, LED.
Signals search system also comprises according to an embodiment of the invention: antenna matching network 104, be connected between multiband aerial module and the multiband handover module, be used for multiband aerial module and multiband handover module are mated, so that the maximise transmission efficiency of the WiMAX signal of a plurality of frequency ranges.Comprise ∏ type or Γ type network that LC forms.
As shown in Figure 2, each major part signal waveform comprises:
The signal waveform 202 of multiband aerial 102 outputs.
The zero intermediate frequency signals waveform 204 of radio frequency integrated circuit 108 outputs.
Fig. 3 is the flow chart of signal search method according to an embodiment of the invention.As shown in Figure 3, this method may further comprise the steps:
Step S302 receives the WiMAX signal of a plurality of frequency ranges, and switches between the WiMAX of a plurality of frequency ranges signal to select the WiMAX signal.
Step S304 is a zero intermediate frequency signals with selected WiMAX conversion of signals, and zero intermediate frequency signals is carried out the automatic search of frequency range and frequency.
Step S306 handles and shows the relevant information of treated zero intermediate frequency signals to the zero intermediate frequency signals that searches.The relevant information of the zero intermediate frequency that shows on display module comprises following at least a information: band information, frequency point information, and strength information.
Fig. 4 is the flow chart of signal search method according to another embodiment of the invention.As shown in Figure 4, this method may further comprise the steps:
Step S402, antenna receives aerial WiMAX signal.
Step S404, matching network is transferred to the multiband change over switch with the signal on the antenna.
Step S406, the multiband diverter switch switches to the signal of different frequency range the input of corresponding radio frequency integrated circuit under the control of microcontroller.
Step S408, radio frequency integrated circuit is amplified signal and is downconverted into zero intermediate frequency and export to microcontroller and handle under the control of microcontroller.
Step S410, microcontroller export to display unit after with signal processing.
Step S412, display shows signal frequency and signal strength signal intensity.
Fig. 5 is the method flow diagram of automatic search of multiband WiMAX signal according to an embodiment of the invention and demonstration.As shown in Figure 5, this method may further comprise the steps:
Step S502, the initial value of frequency is set, be stored in all WiMAX frequency frequency-division sections in the memory in advance, stepping is 25KHz, start radio frequency integrated circuit by control signal, control the multiband diverter switch simultaneously and place low-frequency range, and initial value is sent in the radio frequency integrated circuit by data wire.
Step S504, search start signal by matching network, through the multiband diverter switch, is sent to radio frequency integrated circuit from the signal of antenna induction, through amplifying, is downconverted into the analogue zero intermediate frequency, enters the A/D change-over circuit in the microcontroller.
Step S506, the size of measuring-signal.
Whether step S508 judges signal greater than the threshold value that sets in advance (this value is provided with according to the maximum sensitivity of WiMAX protocol requirement), if execution in step S510 then, otherwise execution in step S512.
Step S510, current signal frequency point and signal strength signal intensity are preserved in tabulation, enter step S514.
Step S512 presets new frequency, exports the switching of control signal control multiband diverter switch when frequency range is changed simultaneously, enters step S504 and restarts search signal.
Step S514 judges whether all frequencies are searched for to finish, if then enter step S516, otherwise enter step S512.
Step S516, order shows the frequency and the intensity of all signals, the time length that the frequency of each signal and intensity show is programmed settings in advance.
By the present invention, multiband WiMAX signal search, checkout gear and corresponding method that a kind of WiMAX of utilization special-purpose radio-frequency integrated circuit circuit is realized have been introduced, can break away from PC fully and independent work reliably, have flexible to operation, the advantage that cost is low.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a signals search system is characterized in that, World Interoperability for Microwave Access, WiMax (WiMAX) signal that is used for a plurality of frequency ranges is searched for, and described system comprises:
The multiband aerial module is used to receive the WiMAX signal of a plurality of frequency ranges, and the WiMAX signal of described a plurality of frequency ranges is sent to the multiband handover module;
Described multiband handover module is used under the control of microcontroller the WiMAX signal of described a plurality of frequency ranges being switched to the corresponding interface of radio-frequency module;
Described radio-frequency module, the WiMAX conversion of signals that is used for described a plurality of frequency ranges that will receive is a zero intermediate frequency signals, and under the control of described microcontroller, described zero intermediate frequency signals is carried out the automatic search of frequency range and frequency, and the zero intermediate frequency signals that is searched is sent to the microcontroller module;
Described microcontroller module is used to control described multiband handover module, described radio frequency integrated circuit, and display module, and is used for the zero intermediate frequency signals that searches is handled and treated zero intermediate frequency signals is sent to described display module; And
Described display module is used under the control of described microcontroller module showing the relevant information of treated zero intermediate frequency signals.
2. signals search system according to claim 1 is characterized in that, described system also comprises:
Antenna matching network is connected between described multiband aerial module and the described multiband handover module, is used for described multiband aerial module and multiband handover module are mated, so that the maximise transmission efficiency of the WiMAX signal of described a plurality of frequency ranges.
3. signals search system according to claim 2 is characterized in that, described multiband aerial module be dipole antenna, multipole antenna, microstrip antenna, and dielectric antenna in a kind of.
4. signals search system according to claim 2 is characterized in that, described antenna matching network is ∏ type network or the Γ type network that inductance capacitance is formed.
5. according to each described signals search system in the claim 1 to 4, it is characterized in that described microcontroller module is the inner microcontroller that is integrated with A/D change-over circuit and memory.
6. according to each described signals search system in the claim 1 to 4, it is characterized in that described display module is LCD or light-emitting diode.
7. according to each described signals search system in the claim 1 to 4, it is characterized in that described relevant information comprises following at least a information: band information, frequency point information, and strength information.
8. a signal search method is characterized in that, World Interoperability for Microwave Access, WiMax (WiMAX) signal that is used for a plurality of frequency ranges is searched for, and said method comprising the steps of:
Step S302 receives the WiMAX signal of a plurality of frequency ranges, and switches between the WiMAX of described a plurality of frequency ranges signal to select the WiMAX signal;
Step S304 is a zero intermediate frequency signals with selected WiMAX conversion of signals, and described zero intermediate frequency signals is carried out the automatic search of frequency range and frequency; And
Step S306 handles and shows the relevant information of treated zero intermediate frequency signals to the zero intermediate frequency signals that searches.
9. signal search method according to claim 8 is characterized in that, described relevant information comprises following at least a information: band information, frequency point information, and strength information.
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| CN200710302319XA CN101202561B (en) | 2007-12-18 | 2007-12-18 | System and method for searching signal |
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| CN200710302319XA CN101202561B (en) | 2007-12-18 | 2007-12-18 | System and method for searching signal |
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| CN101202561A CN101202561A (en) | 2008-06-18 |
| CN101202561B true CN101202561B (en) | 2011-04-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101699913A (en) * | 2009-10-15 | 2010-04-28 | 中兴通讯股份有限公司 | WiMAX frequency band searching method and terminal |
| CN109348524B (en) * | 2015-06-26 | 2022-11-22 | 华为技术有限公司 | A frequency band search method and device |
| CN105554850A (en) * | 2015-12-21 | 2016-05-04 | 联想(北京)有限公司 | Network searching method and electronic equipment |
| CN120017087B (en) * | 2025-04-14 | 2025-09-19 | 北京国电高科科技有限公司 | External dual-band antenna switching system, method and controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1504015A (en) * | 2001-01-04 | 2004-06-09 | 英特赛尔美国公司 | Zero-IF Receiver Using Packet Acquisition and Channel Tracking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1504015A (en) * | 2001-01-04 | 2004-06-09 | 英特赛尔美国公司 | Zero-IF Receiver Using Packet Acquisition and Channel Tracking |
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