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两个或多个接收信号之间的延时估计问题在很多工程应用中具有极其重要的意义。本文提出了广义相位谱延时估计这一概念,推导了它的方差,阐明了它与广义互相关延时估计之间的关系,本文提出了一种次最佳的幅度平方加权的广义相位谱延时估计方法,理论计算和计算机模拟实验结果表明,在所提出的多途信号模型条件下,幅度平方加权延时估计的性能优于Picrsol提出的相位参数延时估计性能。广义相位谱延时估计在工程实践上具有充分有效地利用FFT大规模集成电路新技术,减少计算量和简比设备的优点。
The problem of delay estimation between two or more received signals is of great importance in many engineering applications. In this paper, the concept of generalized phase spectrum delay estimation is proposed, its variance is deduced, and its relation with generalized cross-correlation delay estimation is expounded. A suboptimal amplitude-squared-weighted generalized phase spectrum The delay estimation method, theoretical calculation and computer simulation results show that the performance of amplitude-weighted squared delay estimation is better than that of Picrsol’s proposed phase parameter delay estimation under the proposed multi-path signal model. Generalized phase spectrum delay estimation in engineering practice has full and effective use of FFT large-scale integrated circuit technology to reduce the amount of computation and the advantages of simple equipment.