基于高速合作目标水下定位系统的信号参数估计方法研究

Research on Signal Parameter Estimation Method of Underwater Positioning System Based on High Speed Cooperative Target

针对高速运动的合作目标存在多普勒频率偏移,滤波器性能随之下降,采用基于相位补偿的时延估计和基于频点自跟踪自适应频率估计两种方法进行参数估计,并仿真分析了不同信噪比下基于相位补偿的时延估计性能和不同信噪比下频点自跟踪自适应的频率估计效果,分析结果表明,两种参数估计方法有明显效果。

Aiming at the problem that the Doppler frequency offset will exist and the performance of the filter will be degraded when the cooperative target moves at high speed,which will affect the results of signal experiment estimation and frequency estimation.And simulation analysis of the performance ratio and different SNR frequency auto tracking of frequency estimation results of phase compensation estimation based on different SNR.The analysis results show that the two parameter estimation methods have obvious effect.