A signal synthesis method suitable for multi-antenna arrays in different places
A signal synthesis and multi-antenna technology, applied in related application fields, can solve problems such as inability to converge, large delay difference and frequency difference, poor synthesis effect, etc., and achieve the effect of overcoming long-term amplitude weighted calibration and optimal signal synthesis
Active Publication Date: 2019-07-12
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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However, for antenna arrays in different places, there is a large delay difference and frequency difference between the signals received by each antenna, which makes the synthesis effect of the above method poor or even unable to converge in this scenario.
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[0021] refer to figure 1 , the present invention will be further described.
[0022] A signal synthesis method applicable to multi-antenna arrays in different places, comprising the following steps:
[0023] ① The inter-station delay difference / frequency difference / phase difference model unit receives the externally input antenna 1~antenna N delay prediction model, selects any antenna among antenna 1~antenna N as the reference antenna, and delays antenna 1~antenna N The prediction model is respectively compared with the reference antenna delay prediction model to obtain the inter-station delay difference / frequency difference / phase difference polynomial model corresponding to antenna 1~antenna N; according to the initial value of the residual delay difference and residual frequency difference output by the stripe search unit, The initial values of the residual delay difference and residual phase difference output by the auto-spectrum and cross-spectrum calculation units are ...
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The invention discloses a signal synthesis method applicable to multi-antenna arrays in different places, and mainly solves the problem of efficient signal synthesis of weak received signals on the moon, Mars and deep space at further distances. This method first uses the antenna delay prediction model to obtain the inter-station delay difference / frequency difference / phase difference model, performs rough compensation and fringe search on the antenna signal, and estimates the residual delay difference / residual frequency difference, which is used to correct the inter-station delay difference / frequency difference. Difference model, when the frequency difference estimation accuracy reaches a certain level, it will enter the signal synthesis stage; in the signal synthesis stage, the FX correlation synthesizer is used to estimate and compensate the inter-antenna delay difference, frequency difference, phase difference and amplitude weighted value with high precision , to achieve efficient synthesis of long baseline remote multi-antenna array signals, thereby improving measurement and control accuracy and reducing the bit error rate of data transmission. The present invention is applicable to signal synthesis of multi-antenna arrays in different places, and has lower calculation complexity and higher synthesis performance.
Description
technical field [0001] The invention relates to the multi-antenna array signal synthesis technology in the deep space measurement and control communication, the distributed network radar transceiver coherent synthesis technology, the VLBI interferometric data processing technology, etc. Antennas receive weak deep-space signals for signal enhancement and other related applications. Background technique [0002] In the deep space measurement and control communication system, due to the distance between the deep space spacecraft target and the earth station, ranging from tens of millions to hundreds of millions of kilometers, the received signal strength of the existing measurement and control communication equipment is very weak. The receiving antenna array is an effective means to improve the SNR of the received signal. At present, the signal synthesis method of regional equal-caliber multi-antenna arrays has been studied at home and abroad. For example, DSN has developed fu...
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IPC IPC(8): H04W8/30H04B7/04H04B7/08
CPCH04B7/04H04B7/0842
Inventor 刘友永
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP