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SUMPLE算法是深空网天线组阵中信号合成的最重要方法之一。研究了合成权值的补偿相位估计性能,从参数估计角度分析了该算法具有较好的合成性能原因。同时,进一步利用SUMPLE算法合成权值之间相位差实现多天线信号间的相位差估计,并推导了估计算法的理论性能以及分析了天线数对算法性能的影响。理论分析与仿真结果表明,天线数越多,相位差估计性能越接近估计下界,较适合于低信噪比下多天线信号间的相位差估计。
SUMPLE algorithm is one of the most important methods of signal synthesis in deep space network antenna array. The performance of compensated phase estimation of composite weights is studied, and the reason of good performance of the proposed algorithm is analyzed from the perspective of parameter estimation. At the same time, the phase difference between multi-antenna signals is further calculated by using SUMPLE algorithm to synthesize the phase difference between the weights, and the theoretical performance of the estimation algorithm is deduced and the influence of the antenna number on the performance of the algorithm is also analyzed. The theoretical analysis and simulation results show that the more the number of antennas, the closer the phase difference estimation performance is to the lower bound of estimation, and the more suitable for the phase difference estimation of multi-antenna signals with low signal-to-noise ratio.