CN111245495A - Wireless communication method for resisting side lobe blockage - Google Patents
Wireless communication method for resisting side lobe blockage Download PDFInfo
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- CN111245495A CN111245495A CN202010018339.XA CN202010018339A CN111245495A CN 111245495 A CN111245495 A CN 111245495A CN 202010018339 A CN202010018339 A CN 202010018339A CN 111245495 A CN111245495 A CN 111245495A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 title claims abstract description 14
- 238000007405 data analysis Methods 0.000 claims description 39
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
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Abstract
The invention relates to a wireless communication method for resisting side lobe blockage, which comprises the following steps: performing multi-channel parallel frame synchronization (packet header synchronization) on a single-channel digital signal demodulated by a single receiving beam; and the synchronized digital signal is decoded, analyzed and judged (the judgment is not a code element judgment, but the validity of the received data is judged). Compared with single-channel processing, the method can effectively avoid the locking of frame synchronization caused after the beam side lobe receives the effective signal first, thereby blocking the effective receiving and analysis of the main lobe signal in the frame synchronization locking period.
Description
Technical Field
The invention relates to the technical field of communication, in particular to the technical field of wireless communication based on a phased array system antenna.
Background
The wireless communication system based on the phased array system antenna forms a plurality of narrow beams to complete omnidirectional coverage simultaneously through a digital beam synthesis technology, thereby achieving the effect of omnidirectional receiving antenna. A plurality of narrow beams formed by the digital beam synthesis technology are independent, and each narrow beam corresponds to one receiving processing channel.
Generally, when a plurality of nodes transmit wireless signals from different directions at the same time, a wireless communication system based on a phased array system antenna can correctly complete demodulation and reception processing. However, factors such as small atmospheric attenuation, strong power of a transmitting node or large side lobe gain of a receiving node cause the receiving narrow beam with the side lobe aligned with the transmitting node to have high receiving signal-to-noise ratio, and can also carry out receiving processing correctly. In a communication system, a frame synchronization locking method is generally adopted, so that non-frame synchronization head data which is consistent with a frame synchronization head (only refers to character consistency) in a data stream is prevented from being synchronized; that is, once frame synchronization is completed, the downlink reception process does not perform frame synchronization again within the effective data length.
Therefore, the side lobe aligned to the receiving narrow beam of the transmitting node enters a side lobe blocking state when performing correct downlink receiving processing, and the receiving processing channel corresponding to the receiving narrow beam cannot correctly process the wireless signal in the main lobe direction within the time limit. When entering the side lobe blocking state, even if normal wireless signals arrive in the main lobe direction, the wireless signals entering in the main lobe direction inevitably cannot continue to be correctly demodulated and processed by downlink signals due to the high main-to-side ratio characteristic of the digital synthesis technology of the phased array system antenna. In addition, since the receiving processing channel corresponding to the receiving narrow beam has entered the frame synchronization locking period, the wireless signal in the main lobe direction cannot be frame synchronized.
Disclosure of Invention
The invention aims to provide a wireless communication technology for resisting side lobe blockage.
The technical solution for realizing the purpose of the invention is as follows: and performing multi-channel parallel processing on single-channel digital signals of single receiving narrow beams. Step one, each receiving narrow beam determines whether to carry out frame synchronization according to the working state of a frame synchronization channel; secondly, if the current frame synchronization channel is not in a locking state (idle state), assigning the demodulated data to the channel, and carrying out frame synchronization processing by the channel; thirdly, if the frame synchronization channel finds a frame synchronization head in the demodulated data stream, determining whether to carry out data analysis processing according to the working state of the data analysis channel; and finally, if the current data analysis channel is in an unlocked state (idle state), performing subsequent data analysis processing.
The invention makes the receiving process corresponding to the single receiving narrow beam into multiple channels, and combines the state information of each frame synchronization channel and data analysis channel, thereby effectively solving the problem of side lobe blockage caused by the side lobe of the receiving narrow beam receiving effective data.
Drawings
Fig. 1 is a schematic flow chart of an anti-side valve blockage treatment process.
Fig. 2 is a diagram of frame synchronization channel state management.
FIG. 3 is a diagram illustrating the management of the status of data parsing channels.
Detailed Description
The invention provides a wireless communication method for resisting side lobe blockage.
The schematic flow chart of the anti-side valve blockage treatment is shown in fig. 1. Performing multi-channel parallel frame synchronization (packet header synchronization) on a single-channel digital signal demodulated by a single receiving beam; and the synchronized digital signal is decoded, analyzed and judged (the judgment is not a code element judgment, but the validity of the received data is judged). Compared with single-channel processing, the method can effectively avoid the locking of frame synchronization caused after the beam side lobe receives the effective signal first, thereby blocking the effective receiving and analysis of the main lobe signal in the frame synchronization locking period.
In fig. 1, the number of frame synchronization channels is M, and the number of data analysis channels is N. The software and hardware resources required by data analysis are far greater than those required by frame synchronization. Therefore, in order to reduce the software and hardware resources of the system, M is more than or equal to N in the invention.
The specific steps of the anti-side-valve occlusion treatment are as follows:
(1) in the first step, each receiving narrow beam determines whether to perform frame synchronization according to the working state of the frame synchronization channel.
A frame synchronization channel state management diagram is shown in fig. 2. If the frame synchronization channel which is carrying out the frame synchronization processing finds that the frame synchronization is completed (finds a synchronization head), the status flag of the status register of the frame synchronization channel is busy; and if the distributed data analysis channel is idle, the data analysis channel finishes the data analysis task, the corresponding frame synchronization access is unlocked immediately, and the corresponding frame synchronization channel state register state flag bit is idle.
(2) And secondly, if the current frame synchronization channel is not in a locking state (idle state), assigning the demodulated data to the channel, and carrying out frame synchronization processing by the channel.
The frame synchronization process is simple to implement, i.e. data consistent with the frame synchronization header is found in the demodulated data stream. When the frame synchronization channel carries out frame synchronization processing, the state of whether the channel completes frame synchronization or not is transmitted to the frame synchronization channel state management module in real time, so that the frame synchronization channel can complete the state management of a plurality of frame synchronization channels.
(3) And thirdly, if the frame synchronization channel finds the frame synchronization head in the demodulated data stream, determining whether to carry out data analysis processing according to the working state of the data analysis channel. If the data analysis channel is idle, assigning the data of the frame synchronization channel to the idle data analysis channel, and busy the status flag bit of the corresponding data analysis channel.
Fig. 3 is a schematic diagram of data analysis channel status management. If the data judgment state sent by the data analysis channel of the data analysis task is abnormal, which indicates that the received data is possibly interfered or the frame synchronization is abnormal, the data analysis task of the data analysis channel is immediately ended, and the flag bit of the state register corresponding to the data analysis channel is idle. In addition, if a data analysis task end flag sent by a data analysis channel with a data analysis task is received, it indicates that the data analysis channel has completed the data analysis task for one data packet (data frame), and the flag bit of the status register corresponding to the data analysis channel should be idle.
(4) And fourthly, if the current data analysis channel is in an unlocked state (idle state), carrying out subsequent data analysis processing by the data analysis channel.
The data analysis processing comprises data decoding, analysis, judgment and the like, and a data judgment result is sent to the data analysis channel state management module in real time. Wherein, the data judgment result comprises whether the data judgment is correct or not and whether the data judgment task is finished or not.
Claims (3)
1. A sidelobe blockage resistant wireless communication method, characterized by:
the first step is as follows: each receiving narrow beam determines whether to carry out frame synchronization according to the working state of a frame synchronization channel;
the second step is that: if the current frame synchronization channel is not in a locking state, namely an idle state, assigning the demodulated data to the channel, and carrying out frame synchronization processing by the channel;
the third step: if the frame synchronization channel finds a frame synchronization head in the demodulated data stream, determining whether to perform data analysis processing according to the working state of the data analysis channel;
the fourth step: and if the current data analysis channel is in an unlocked state, performing subsequent data analysis processing.
2. The method of claim 1, wherein the sidelobe blockage resistant wireless communication method comprises: the busy state of the corresponding frame synchronization channel is determined by using a frame synchronization mark processed by frame synchronization by adopting a frame synchronization channel state management mechanism; and finishing idle identification of the corresponding frame synchronization channel by using a data judgment result of the data analysis channel.
3. A method of wireless communication according to claim 1 or claim 2, wherein the sidelobe blockage-resistant wireless communication method comprises: adopting a data analysis channel state management mechanism: finishing the busy identification of the corresponding frame synchronization channel by using the frame synchronization mark and the assignment success mark of the frame synchronization processing; and finishing idle identification of the corresponding frame synchronization channel by using a data judgment result of the data analysis channel.
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| CN202010018339.XA CN111245495A (en) | 2020-01-08 | 2020-01-08 | Wireless communication method for resisting side lobe blockage |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826912A (en) * | 2010-04-14 | 2010-09-08 | 东方通信股份有限公司 | Signal processing method of base band receiver of base station in digital wireless trunking communication system based on TDMA (Time Division Multiple Address) technology and base band receiver |
| CN101931594A (en) * | 2010-04-14 | 2010-12-29 | 东方通信股份有限公司 | Signal processing method for base band receiver of base station and base band receiver |
| CN109743100A (en) * | 2019-01-15 | 2019-05-10 | 北京理工大学 | The multi-user channel distribution method of capturing information based on Big Dipper short message system |
| CN110098881A (en) * | 2019-05-07 | 2019-08-06 | 中国人民解放军32039部队 | Width beam signal transmission method, device and electronic equipment |
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- 2020-01-08 CN CN202010018339.XA patent/CN111245495A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826912A (en) * | 2010-04-14 | 2010-09-08 | 东方通信股份有限公司 | Signal processing method of base band receiver of base station in digital wireless trunking communication system based on TDMA (Time Division Multiple Address) technology and base band receiver |
| CN101931594A (en) * | 2010-04-14 | 2010-12-29 | 东方通信股份有限公司 | Signal processing method for base band receiver of base station and base band receiver |
| CN109743100A (en) * | 2019-01-15 | 2019-05-10 | 北京理工大学 | The multi-user channel distribution method of capturing information based on Big Dipper short message system |
| CN110098881A (en) * | 2019-05-07 | 2019-08-06 | 中国人民解放军32039部队 | Width beam signal transmission method, device and electronic equipment |
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Address after: 210003 No. 346, Zhongshan North Road, Jiangsu, Nanjing Applicant after: 724 Research Institute of China Shipbuilding Corp. Address before: 210003 No. 346, Zhongshan North Road, Jiangsu, Nanjing Applicant before: 724TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. |
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Application publication date: 20200605 |