色噪声背景下宽频段相干信号多维参数联合估计的算法

Multi-Parameter Estimation of Wide-Band Coherent Signals in Colored Noise

基于非均匀的L型阵列和四阶累积量,本文提出了一种宽频段相干信号频率、二维到达角和极化参数联合估计的算法—CTSS算法。在色噪声环境下,该算法能精确地估计具有相同数字频率的相干信号的多维参数,无需多维谱峰搜索,并且信号的多维参数能够自动配对。另外,在CTSS算法的基础上,利用阵列的分维特点进一步处理,成功地实现了具有频率兼并现象的宽频段相干信号的多维参数估计。计算机仿真结果验证了算法的有效性。

Based on nonuniform L-shaped array and fourth-order cumulant, the paper presents a new method, i. e. c,rI？SS algorithm,for joint estimation of frequency, 2-D arrival angles and polarization of coherent signals over a wide frequency band. In colored Gaussian noises, the algorithm can precisely estimate multidimensional parameters of coherent signals with same digital frequency. It doesn＇ t need the multidimensional spectrum peak search with multidimensional parameters paired automatically. In addition, based on CTSS algorithm and the characteristic of the L-shaped array, multidimensional parameter estimation of coherent signals with the same frequency is realized successfully by a separable method. Computer simulation confirms its effectiveness.