CN113938180A - A multi-channel amplitude and phase self-calibration method for a satellite communication processor - Google Patents
A multi-channel amplitude and phase self-calibration method for a satellite communication processor Download PDFInfo
- Publication number
- CN113938180A CN113938180A CN202111187011.1A CN202111187011A CN113938180A CN 113938180 A CN113938180 A CN 113938180A CN 202111187011 A CN202111187011 A CN 202111187011A CN 113938180 A CN113938180 A CN 113938180A
- Authority
- CN
- China
- Prior art keywords
- radio frequency
- processing module
- channel
- frequency switch
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 10
- 238000012545 processing Methods 0.000 claims abstract description 51
- 238000012937 correction Methods 0.000 claims abstract description 28
- 230000003321 amplification Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18515—Transmission equipment in satellites or space-based relays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a multi-channel amplitude-phase self-calibration framework of a satellite communication processor, which comprises the following components: the device comprises an antenna array, a radio frequency switch, a radio frequency filter, a radio frequency signal processing module, a baseband processing module and a correction source; the common port of the radio frequency switch is connected with a radio frequency filter, the other two ports are respectively connected with the antenna array and the correction source, the radio frequency filter is connected with a radio frequency signal processing module, the radio frequency signal processing module is connected with a baseband processing module, the baseband processing module is connected with the radio frequency switch, and the ports of the radio frequency switch are controlled to be switched and connected with the antenna array or the correction source. The invention sets the correction source in the processor, can realize multi-channel self-calibration by utilizing the interval of communication receiving time, compensates the deviation of amplitude and phase caused by the discreteness of the radio frequency channel device in real time and achieves the optimal anti-interference index effect.
Description
Technical Field
The invention belongs to the technical field of satellite communication processor design, and relates to a multi-channel amplitude-phase self-calibration method for a satellite communication processor.
Background
In order to improve the anti-interference performance, the satellite communication processor generally uses a multi-element antenna array to implement the function of spatial filtering. The wireless signals received by the multi-array element antenna are received in parallel through a plurality of radio frequency channels, the amplitude and the phase of the radio frequency signals (including useful signals and interference signals) received by different antenna array elements are analyzed, the spatial filtering function is realized through a spatial adaptive filtering algorithm, and finally the purpose of improving the spatial anti-interference performance index is achieved.
In the design process of the satellite communication processor architecture, ensuring the amplitude-phase consistency of multiple radio frequency receiving channels is the key point and difficulty of the system design. If the amplitude and the phase of the multi-channel radio frequency channel in the receiver are deviated, the result of the subsequent spatial domain adaptive filtering is deviated, and the anti-interference function cannot be realized or the anti-interference performance index is reduced.
In the traditional process, a signal source pre-calibration method is adopted before each processor leaves a factory, and due to the discrete type of the performance of radio frequency devices, each product needs to be manually corrected and correction parameters are stored respectively, so that the workload is large, the differences of amplitude and phase of a receiving channel are different under different high and low temperature conditions, the receiving channel can only be estimated through normal temperature parameters, and the correction precision is not high.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: aiming at the defects of the prior art, a multi-channel amplitude-phase self-calibration method for a satellite communication processor is provided.
(II) technical scheme
In order to solve the above technical problems, the present invention provides a method
(III) advantageous effects
According to the multi-channel amplitude-phase self-calibration method for the satellite communication processor, the calibration source is arranged in the processor, multi-channel self-calibration can be achieved by utilizing the interval of communication receiving time, amplitude and phase deviation caused by the discreteness of the radio frequency channel device is compensated in real time, and the optimal anti-interference index effect is achieved.
Drawings
Fig. 1 is a schematic diagram of a multi-channel amplitude-phase self-calibration architecture of a satellite communication processor according to an embodiment of the present invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
Referring to fig. 1, the multi-channel amplitude-phase self-calibration architecture of the satellite communication processor of the embodiment includes: the device comprises an antenna array, a radio frequency switch, a radio frequency filter, a radio frequency signal processing module, a baseband processing module and a correction source; the common port of the radio frequency switch is connected with a radio frequency filter, the other two ports are respectively connected with the antenna array and the correction source, the radio frequency filter is connected with a radio frequency signal processing module, the radio frequency signal processing module is connected with a baseband processing module, the baseband processing module is connected with the radio frequency switch, and the ports of the radio frequency switch are controlled to be switched and connected with the antenna array or the correction source.
The antenna array is a multi-array element antenna, and each antenna is correspondingly connected with a radio frequency switch.
In this embodiment, the antenna array is a seven-array antenna, the radio frequency switch is provided with seven paths, each path of radio frequency switch is connected with one radio frequency filter, each radio frequency filter is connected with one radio frequency signal processing module, and the seven radio frequency signal processing modules are connected to the baseband processing module.
The baseband processing module is connected with each path of radio frequency switch through a control cable.
The radio frequency signal processing module comprises an amplifier, a frequency mixer and an analog-digital collector, and sequentially performs amplification processing, frequency mixing processing and analog-digital conversion processing on the filtered signals.
And the baseband processing module completes the anti-interference resolving and signal demodulation processing of the baseband signals.
The seven-array antenna is respectively connected with one port of the seven-path radio frequency switch through a radio frequency cable, and the other port of the radio frequency switch is connected with a correction source; the common port of each radio frequency switch is connected with a radio frequency filter, radio frequency signals are output to a baseband processing module after passing through an amplifier, a mixer, an analog-digital collector and other devices, the baseband processing module completes the anti-interference resolving and signal demodulating functions of the baseband signals, and simultaneously, the signal switching of the radio frequency switches is controlled according to the receiving and sending time slots of information.
The satellite communication processor adopts a half-duplex communication system, and the information transmission and the information receiving are carried out according to a preset time slot. In a receiving time slot, the baseband processing module controls a channel control signal, switches the radio frequency switch to an antenna array channel, receives a wireless communication signal according to the current latest channel amplitude and phase correction value, and performs anti-interference resolving and signal demodulation processing; in the transmitting time slot, the baseband processing module controls the channel control signal of the radio frequency switch, switches the radio frequency switch to the correction source channel, receives the standard correction signal transmitted by the correction source, can acquire the difference of the amplitude and the phase between the channels by sampling the correction source signal, and iteratively stores the value corrected last time for receiving the next time slot.
According to the technical scheme, the self-calibration framework design of the satellite communication processor is adopted, the real-time correction of the characteristics of the multipath receiving channels can be realized by adding the correction sources, the workload of early manual correction is greatly simplified, more accurate correction values are provided under different temperature environments, and reliable and accurate hardware platform guarantee is provided for subsequent anti-interference processing.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A multi-channel amplitude-phase self-calibration architecture of a satellite communication processor is characterized by comprising the following components: the device comprises an antenna array, a radio frequency switch, a radio frequency filter, a radio frequency signal processing module, a baseband processing module and a correction source; the common port of the radio frequency switch is connected with a radio frequency filter, the other two ports are respectively connected with the antenna array and the correction source, the radio frequency filter is connected with a radio frequency signal processing module, the radio frequency signal processing module is connected with a baseband processing module, the baseband processing module is connected with the radio frequency switch, and the ports of the radio frequency switch are controlled to be switched and connected with the antenna array or the correction source.
2. The satellite communications handler multi-channel amplitude-phase self-calibration architecture of claim 1, wherein the antenna array is a multi-element antenna, each antenna being connected to a radio frequency switch.
3. The satellite communications processor multi-channel amplitude-phase self-calibration architecture of claim 2, wherein the antenna array is a seven-element antenna, the rf switch has seven paths, each path of the rf switch is connected to an rf filter, each rf filter is connected to an rf signal processing module, and the seven rf signal processing modules are connected to the baseband processing module.
4. The satellite communications processor multi-channel amplitude-phase self-calibration architecture of claim 3, wherein the baseband processing module is connected with each radio frequency switch via a control cable.
5. The satellite communication processor multichannel amplitude-phase self-calibration architecture as claimed in claim 4, wherein the radio frequency signal processing module includes an amplifier, a mixer, and an analog-to-digital collector, and sequentially performs amplification processing, mixing processing, and analog-to-digital conversion processing on the filtered signal.
6. The satellite communications processor multi-channel amplitude-phase self-calibration architecture of claim 5, wherein the baseband processing module performs anti-jamming solution and signal demodulation processing on the baseband signals.
7. The satellite communications processor multi-channel amplitude-phase self-calibration architecture of claim 6, wherein the satellite communications processor employs a half-duplex communications scheme, and wherein transmitting information and receiving information occur in accordance with predetermined time slots.
8. The satellite communications processor multi-channel amplitude-phase self-calibration architecture of claim 7, wherein during a receive timeslot, the baseband processing module controls channel control signals to switch the radio frequency switch to the antenna array channels; and in the transmitting time slot, the baseband processing module controls a channel control signal of the radio frequency switch and switches the radio frequency switch to a correction source channel.
9. A multi-channel amplitude-phase self-calibration method for a satellite communication processor is characterized in that a multi-channel antenna array is respectively connected with one port of a corresponding radio frequency switch through a radio frequency cable, and the other port of the radio frequency switch is connected with a calibration source; the common port of each radio frequency switch is connected with a radio frequency filter, radio frequency signals are output to a baseband processing module after passing through an amplifier, a mixer and an analog-digital collector, the baseband processing module completes the anti-interference resolving and signal demodulating functions of the baseband signals, and simultaneously, the signal switching of the radio frequency switches is controlled according to the receiving and transmitting time slots of information.
10. The multi-channel amplitude-phase self-calibration method of the satellite communication processor of claim 9, wherein the satellite communication processor adopts a half-duplex communication system, the transmitting information and the receiving information are performed according to a predetermined time slot, the baseband processing module controls a channel control signal at the receiving time slot, the radio frequency switch is switched to an antenna array channel, the wireless communication signal is received according to the current latest channel amplitude-phase correction value, and anti-interference resolving and signal demodulation processing are performed; in the transmitting time slot, the baseband processing module controls the channel control signal of the radio frequency switch, switches the radio frequency switch to the correction source channel, receives the standard correction signal transmitted by the correction source, acquires the difference of the amplitude and the phase between the channels by sampling the correction source signal, and iteratively stores the value corrected last time for receiving the next time slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111187011.1A CN113938180B (en) | 2021-10-12 | 2021-10-12 | A satellite communication processor multi-channel amplitude and phase self-calibration system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111187011.1A CN113938180B (en) | 2021-10-12 | 2021-10-12 | A satellite communication processor multi-channel amplitude and phase self-calibration system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113938180A true CN113938180A (en) | 2022-01-14 |
| CN113938180B CN113938180B (en) | 2024-11-05 |
Family
ID=79278288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111187011.1A Active CN113938180B (en) | 2021-10-12 | 2021-10-12 | A satellite communication processor multi-channel amplitude and phase self-calibration system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113938180B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117826071A (en) * | 2024-03-06 | 2024-04-05 | 成都大公博创信息技术有限公司 | Direction finding system and method for realizing broadband calibration of multiple acquisition modules based on intermediate frequency triggering |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002353724A (en) * | 2001-05-25 | 2002-12-06 | Nec Wireless Networks Ltd | Method for calibrating antenna transmission pattern |
| CN101964449A (en) * | 2010-08-27 | 2011-02-02 | 中国科学院上海微系统与信息技术研究所 | On-track correcting device of space-borne phased array transmitting antenna |
| CN103391123A (en) * | 2013-07-25 | 2013-11-13 | 中国科学院上海微系统与信息技术研究所 | Satellite-borne multi-beam receiving antenna correction system and method |
| CN103399324A (en) * | 2013-08-13 | 2013-11-20 | 北京星地恒通信息科技有限公司 | Anti-interference antenna of satellite navigation |
| CN104506253A (en) * | 2015-01-13 | 2015-04-08 | 重庆大学 | Amplitude phase error correction system and method for transmitting channel of phased-array antenna |
| CN104539377A (en) * | 2014-12-16 | 2015-04-22 | 上海原动力通信科技有限公司 | Calibrating device, system and method |
| WO2015062761A1 (en) * | 2013-10-29 | 2015-05-07 | Socowave Technologies Limited | Active antenna system and methods of testing |
| US9360549B1 (en) * | 2014-06-05 | 2016-06-07 | Thales-Raytheon Systems Company Llc | Methods and apparatus for a self-calibrated signal injection setup for in-field receive phased array calibration system |
| CN106932790A (en) * | 2017-02-27 | 2017-07-07 | 北京国科导通科技有限公司 | A kind of anti-interference global position system of seven array elements |
| CN107315183A (en) * | 2017-06-01 | 2017-11-03 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The calibration method of aeronautical satellite array antenna received system |
| CN108051772A (en) * | 2017-10-25 | 2018-05-18 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Width be combined measurement incoming wave azimuth information method |
| CN109088679A (en) * | 2018-08-31 | 2018-12-25 | 京信通信系统（中国）有限公司 | Active Arrays calibration system, method, apparatus and Active Arrays system |
| CN208656779U (en) * | 2018-08-31 | 2019-03-26 | 京信通信系统（中国）有限公司 | Active array antenna calibration system and active array antenna system |
| CN111726173A (en) * | 2020-06-29 | 2020-09-29 | 中国电子科技集团公司第五十四研究所 | An internal calibration system and method for transmitting and receiving duplex phased array antennas |
| CN112255605A (en) * | 2020-11-24 | 2021-01-22 | 武汉滨湖电子有限责任公司 | Multichannel receiver gain compensation system for amplitude-comparison altimetry radar |
-
2021
- 2021-10-12 CN CN202111187011.1A patent/CN113938180B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002353724A (en) * | 2001-05-25 | 2002-12-06 | Nec Wireless Networks Ltd | Method for calibrating antenna transmission pattern |
| CN101964449A (en) * | 2010-08-27 | 2011-02-02 | 中国科学院上海微系统与信息技术研究所 | On-track correcting device of space-borne phased array transmitting antenna |
| CN103391123A (en) * | 2013-07-25 | 2013-11-13 | 中国科学院上海微系统与信息技术研究所 | Satellite-borne multi-beam receiving antenna correction system and method |
| CN103399324A (en) * | 2013-08-13 | 2013-11-20 | 北京星地恒通信息科技有限公司 | Anti-interference antenna of satellite navigation |
| WO2015062761A1 (en) * | 2013-10-29 | 2015-05-07 | Socowave Technologies Limited | Active antenna system and methods of testing |
| US9360549B1 (en) * | 2014-06-05 | 2016-06-07 | Thales-Raytheon Systems Company Llc | Methods and apparatus for a self-calibrated signal injection setup for in-field receive phased array calibration system |
| CN104539377A (en) * | 2014-12-16 | 2015-04-22 | 上海原动力通信科技有限公司 | Calibrating device, system and method |
| CN104506253A (en) * | 2015-01-13 | 2015-04-08 | 重庆大学 | Amplitude phase error correction system and method for transmitting channel of phased-array antenna |
| CN106932790A (en) * | 2017-02-27 | 2017-07-07 | 北京国科导通科技有限公司 | A kind of anti-interference global position system of seven array elements |
| CN107315183A (en) * | 2017-06-01 | 2017-11-03 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The calibration method of aeronautical satellite array antenna received system |
| CN108051772A (en) * | 2017-10-25 | 2018-05-18 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Width be combined measurement incoming wave azimuth information method |
| CN109088679A (en) * | 2018-08-31 | 2018-12-25 | 京信通信系统（中国）有限公司 | Active Arrays calibration system, method, apparatus and Active Arrays system |
| CN208656779U (en) * | 2018-08-31 | 2019-03-26 | 京信通信系统（中国）有限公司 | Active array antenna calibration system and active array antenna system |
| CN111726173A (en) * | 2020-06-29 | 2020-09-29 | 中国电子科技集团公司第五十四研究所 | An internal calibration system and method for transmitting and receiving duplex phased array antennas |
| CN112255605A (en) * | 2020-11-24 | 2021-01-22 | 武汉滨湖电子有限责任公司 | Multichannel receiver gain compensation system for amplitude-comparison altimetry radar |
Non-Patent Citations (3)
| Title |
|---|
| MIGUEL A.SALAS-NATERA: "Circularly Polarized Active Antenna Array System Calibration for Improved Axial Ratio Systems", 《2019 13TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION》 * |
| 张涛: "无线通信抗干扰关键技术研究", 《中国博士学位论文全文数据库-信息科技辑》 * |
| 杨贺等: "基于软件无线电架构的智能天线幅相校准", 《电讯技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117826071A (en) * | 2024-03-06 | 2024-04-05 | 成都大公博创信息技术有限公司 | Direction finding system and method for realizing broadband calibration of multiple acquisition modules based on intermediate frequency triggering |
| CN117826071B (en) * | 2024-03-06 | 2024-05-28 | 成都大公博创信息技术有限公司 | Direction finding system and method for realizing broadband calibration of multiple acquisition modules based on intermediate frequency triggering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113938180B (en) | 2024-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11362749B2 (en) | Switching sub-system for distributed antenna systems using time division duplexing | |
| US10498430B2 (en) | Expand dynamic of TDD signal detection and expand robustness against volatile signals | |
| CN110915174B (en) | Correction device and correction method | |
| US7231189B2 (en) | Transmit and/or receive channel communication system with switchably coupled multiple filtering components | |
| EP3220553A1 (en) | Antenna and active antenna system | |
| WO2018111454A1 (en) | Control circuit and apparatus, radio frequency circuit and apparatus, transceiver, mobile terminal, methods and computer programs for determining calibration values for a radio frequency circuit | |
| CN113824491B (en) | Ku/Ka dual-band satellite-communication ground station-oriented multi-frequency-point interference sampling circuit and method | |
| CN107959533A (en) | A kind of wireless device and radio-frequency channel calibration method | |
| CN107994958B (en) | Channel phase consistency debugging system and method of broadband detection receiver | |
| KR102264091B1 (en) | Method and Apparatus for Obtaining TDD Synchronization at Relay | |
| CN113938180A (en) | A multi-channel amplitude and phase self-calibration method for a satellite communication processor | |
| CN114167454A (en) | A satellite navigation anti-jamming antenna channel amplitude and phase consistency calibration system and method | |
| CN210867659U (en) | Multi-target real-time telemetering signal receiving system | |
| CN115941078B (en) | A receiver multi-channel consistency calibration method based on intermediate frequency processing unit | |
| CN110855380B (en) | Power calibration device and method for broadband high-precision receiver | |
| CN110311724B (en) | Digital front end, physical layer structure and terminal based on software definition | |
| EP4287514A1 (en) | Beamformer and method of operation of a beamformer for mimo antenna system | |
| CN115603749A (en) | Time delay sampling method and device for broadband radio frequency signal | |
| CN114006641B (en) | Millimeter wave asymmetric large-scale MIMO receiving and transmitting system architecture | |
| CN112583443B (en) | Antenna adjusting method for wireless client front-end equipment and wireless client front-end equipment | |
| US20220029652A1 (en) | High frequency radio including an adjustable-bandwidth tunable bandpass filter for improved detection of incoming calls and methods for processing incoming calls | |
| CN120474639B (en) | Broadband high-precision single-channel direction-finding device and method based on time-division multiplexing phase-shifting technology | |
| US20140010227A1 (en) | Receiver design for geo-location and/or phase coherent processing | |
| WO2020240073A1 (en) | An antenna switching solution | |
| CN221631661U (en) | Zero intermediate frequency radio frequency front-end circuit and radio direction finding positioning equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |