宽频段相干信号三维参数联合估计的新算法

A New Method for Joint Estimation of 3-D Parameters of Coherent Signals over Wide Frequency Band

基于非均匀的L型阵列,本文提出了一种宽频段相干信号频率和二维到达角联合估计的时空二维处理新方B法—WTSS(wide-band time-space smoothing)算法。该算法能精确地估计具有相同数字频率的相干信号的三维参数,无需多维谱峰搜索,具有计算量小,参数自动配对的优点。另外,在WTSS算法的基础上,利用L型阵列的特点进行分维处理,成功地实现了具有频率兼并现象的相干信号的三维参数估计。该算法能够并行实现以进一步增强其实时性。计算机仿真结果验证了算法的有效性。

Based on nonuniform L-shaped array,the paper presents a new time-space processing method for joint estimation of frequency and 2-D arrival angles of coherent signals over a wide frequency band, which is called wide-band time-space smoothing （WTSS） algorithm. The algorithm can precisely estimate 3-D parameters of coherent signals with same digital frequency. Getting rid of the costly multidimensional spectrum peak search, it has smaller computational load, with parameters paired automatically. In addition, based on WTSS algorithm and the characteristic of the L-shaped array,3-D parameter estimation of coherent signals with the same frequency is realized successfully by a separable method. It may be implemented in parallel way for real-time processing. Computer simulation confirms its effectiveness.