时差相差联合估计的多站信号合成增强方法OA

Since the existing signal synthesis methods seldom consider the distributed multi-station delay estimation and com-pensation,a distributed multi-station signal synthesis enhancement method based on the joint estimation of signal time difference is proposed.Under the condition of time difference pre-estimation to ensure the convergence of iteration,the method uses the cross-correlation between each station signal and the weighted and composed reference signals of all other stations to generate com-plex weighted values,and uses the synthetic signals generated by each iteration as the benchmark to complete the joint estimation and compensation of time difference and difference,so as to solve the problem of large signal delay introduced by distributed multi-stations.Simulation results show that the proposed method can reduce the time difference estimation error between stations by more than 70%and reduce the gain loss of signal synthesis to less than 0.5 dB under the condition of 10 stations and-5 dB sig-nal-to-noise ratio.This method can effectively eliminate the residual time difference between stations and improve the sig-nal-to-noise ratio of the received signal.