双谱时延估计在被动测距中的应用

摘要

Time delay estimation is the key for the passive ranging sonar to achieve accurate positioning. The paper mainly researches the application of bi-spectrum time-delay estimation to passive ranging on the basis of introducing correlated time-delay estimation. According to the theoretical analysis and simulation results, bi-spectrum time-delay estimation has many advantages compared to the correlated time-delay estimation, such as accurate time-delay estimation, smaller error and better capability to remove Gaussian noise.%时延估计是被动测距声纳实现目标精确定位的关键。本文在介绍互相关法时延估计的基础上，重点研究了双谱时延估计方法在被动测距中的应用。理论分析和仿真实验结果表明，相比互相关法时延估计；双谱法时延估计具有时延估计精度高、误差小、对高斯噪声的抑制能力强等优点。