对单路接收信号的自相关函数使用等间隔或变间隔时延截取得到M段信号,进而采用相位匹配原理进行正弦信号参数估计,能够进一步改善估计性能,尤其是变间隔时延可抑制大部分奇异峰。仿真结果表明,自相关域信号相位匹配原理的正弦信号参数估计精度优于频域信号相位匹配原理的参数估计精度。
The accuracy of parameter estimation for sinusoidal signals is further improved by intercepting a signal into M segments with equal or varying intervals after autocorrelation. Especially the varying interval can eliminate most of false peaks. Simulation results show that the method using signal phase matching principle (SPMP) in the autocorrelation domain has a better performance than that using SPMP in the frequency domain.