针对雷达信号处理中信噪比估计的性能评价问题,研究了常用的二阶、四阶矩(M2M4)方法的统计性能。文中借助 一阶泰勒近似,推导了该算法的均方根误差的近似闭合解,给出了其信噪比、观测数据长度的近似关系。计算机仿真结果 表明,文中给出的近似公式计算结果针对常规信号、线性调频信号,在一定信噪比范围与仿真结果是吻合的。

The statistic performance evaluation of signal to noise ratio(SNR) estimation in radar signal processing is discussed , which focused on the second moment and fourth moment (M2M4) based estimator. With the help of first-order Taylor approximation, the root mean square error of the algorithm is derived in approximately closed form solution which gave its, relationship with the length of observed data and SNR. Computer simulation results show that the approximate formula for the Normal signal(NS), linear FM signal(LFM) are consistent with the simulated results in a certain SNR range.

江苏省自然科学基金资助