多通道干扰下的多径时延估计

Multipath Time Delay Estimation in Multi Channel Disturbance Case

在考虑多通道非平稳信号干扰及背景噪声的情况下 ,本文提出的基于循环相关的参数型时间延时估计方法 ,可准确地进行多径传输情况下的时间延时估计 ,有效地抑制干扰和噪声的影响 .在估计性能方面 ,该方法优于基于相关的方法 .在运算量和适应性能方面 ,该方法优于基于高阶累积量的方法 .

Taking into account the multi-channels disturbance and noises with the non-stationary characteristic, time delay estimation based on cyclic correlation parametric approach is proposed. Multi-path time delays are estimated precisely with this method, and disturbances and noises can be refrained effectively. This method has better performance than the time delay estimation based on correlative and has less calculating amount and more wide applicability than the estimation based on the higher-order cumulant approach. The relevant conclusions are got and verified by the simulation experiments.