深空天线组阵相关合成算法的Simulink仿真与分析

为对深空网天线组阵中几种相关合成算法进行分析比较,构建了一种新的Simulink仿真模型。将其应用于某测控站天线组阵试验数据,验证了模型的可行性。在此仿真模型下,对Simple、Sumple和Matrix-free 算法进行了频标同源/频标不同源、弱信号/强信号、2/3/6个天线等组阵情况下的仿真分析。三种算法在频标同源情况下的合成效率均优于不同源的情况；强信号组阵情况下,三种算法的信噪比合成性能基本相当；Simple算法在6天线情况下,信噪比合成性能下降；Sumple算法在组阵的天线数目很少时,合成信噪比较低且不稳定,在天线数目较多时性能良好；Matrix-free算法性能稳健,合成效率始终大于95%。该Simulink仿真模型对于进行天线组阵信号相关算法的分析具有一定的价值。

Simulink simulation and analysis of correlating and combining algorithms for antenna arraying in deep space network

To compare and analyze the correlating and combining algorithms of antenna arraying in deep space network(DSN),a new Simulink simulation model is established.Application of the model in the testing data of a service TT&C station has proved its feasibility.In the condition of same frequency source and different one,strong signals and weak signals,2/3/6 antennas,the simulations of the three algorithms,Simple,Sumple,and Matrix-free are carried out on the model. The results show that all the three algorithms have better combining efficiencies in the condition of same frequency source versus different frequency source,and have basically the same signal-to- noise ratio(SNR) combining performance if the signals of antenna arraying are strong. The performance of Simple algorithm drops in the case of 6 antennas. On the contrary,the performance of Sumple algorithm is relatively bad and unstable in the condition of little arraying antennas while it is better and better when the number of antennas increases more and more. Matrix-free algorithm behaves well and stablely,and it can always give a good combining efficiency greater than 95%. The Simulink model for correlating and combining algorithms has a certain value for the analysis of correlating algorithms in antenna arraying.