单通道阵列无失真空时二维谱估计算法

Distortionless Space-time Spectrum Estimate Algorithm in Switch Antenna Array System

针对单通道阵列空时二维谱估计问题,提出了一种处理单通道阵列采样信号的新方法。该方法构建了单通道阵列特有的含有通道切换时间与采样间隔的阵列流型矩阵与导向矢量;无需对原始采样信号进行预处理,使其直接应用于现有的谱估计算法。基于此信号处理方法,给出了单通道空时平面阵以及去冗余的空时L型阵无失真二维谱估计算法,在同等条件下,两种算法以较小的硬件规模在避免信号失真的基础上从性能上更加逼近常规阵列算法,并通过算法成本比较证明了空时L型阵无失真二维谱估计算法具有较小的成本。仿真分析验证了该处理方法以及所提出算法的有效性。

A new sampled data processing method of switch antenna is proposed for space-time spectrum estimate in switch antenna array system. This method constructs the switch antenna array＇s particular array manifold matrix and steering vector which contains channel switch interval and sampling interval. It dispenses with pretreatment to original data so that they can apply to the existing spectrum estimate algorithm directly. Based on this data processing method, distortionless space-time planar array algorithm and irredundant L-shaped array spectrum estimate algorithm in switch antenna array are given, With smaller hardware scale, the two algorithms which avoid signal distortion are more closed to multi-receiver array algorithm in performance. The computational complexity of the latter one is also lower through the com- parison of algorithm cost among the classical algorithms and the proposed algorithms. Simula- tion analysis verifies that the two al^orithms are effective.