模式空间矩阵重构波束形成算法研究

Research on the MODE-TOEP Beamforming Algorithm

该文提出了一种均匀圆阵相干波束形成方法,这里称为模式空间矩阵重构(MODE-TOEP)波束形成算法。该算法在对均匀圆形阵列(UCA)的输出信号进行模式空间转换的此基础上,重新构一个特殊的Toeplitz矩阵,然后进行基于特征空间的波束形成,可以有效地抑制相干干扰。与模式空间平滑ESB算法相比,MODE-TOEP波束形成算法运算量小而且干扰抑制性能更好。计算机仿真表明MODE-TOEP波束形成算法的有效性和优越性。

The MODE-TOEP beamforming algorithm is proposed to suppress the coherent interference on a Uniform Circular Array （UCA）. Firstly, the mode space transformation is used to transform the UCA into a Virtual ULA （VULA）. On this base, a Toeplitz matrix can be reconstructed. Then EigenSpace-Based （ESB） beamforming is applied to suppress the coherent interference successfully. MODE-TOEP beamforming algorithm has less computational burden due to non-spatial smoothing but has a better performance of the interference suppression compared with conventional MODF-SS beam-forming algorithm. Simulation results show the validity and merit of the MODE-TOEP beamforming algorithm.