基于相关分析和模式匹配的多普勒频率测量方法

A Method of Doppler Frequency Measurement Based on Correlation Analyse and Mode Mathcing

研究了利用相关分析方法计算声纳信号的幅值和噪声方差 ,并以计算的估计误差最小为准则 ,运用模式匹配的原理实现了多普勒频率的搜索估计。文章推导了相关分析法的信噪比 ,表明该方法抑制噪声能力强 ,通过预先计算频偏矩阵使计算量得到减少。最后通过仿真计算验证了算法的性能。

A new method is proposed to simultaneous estimation of both the magnitude of signal and variation of noise,we use mode matching principle to search Doppler frequency by minimized estimate error.Paper deduced the SNR of correlation analysis,showed this method has good restrain noise capability,the magnitude of compute can be decreased greatly by frequency-offset matrix computed in advance.At last the efficiency of algorithm is confirmed by computer simulations.