基于子带SDL的LCMV宽带波束形成性能分析

对子带阵元延迟线 （SDL）波束形成器的线性约束最小方差（LCMV）宽带自适应波束形成算法进行了性能分析 。推导了子带LCMV算法的输出信干噪比（SINR）的解析表达式，对比了子带LCMV算法和全带 LCMV算法的阵列响应性能，以及阵元数量、输入信噪比（SNR）和阵元间距对输出SINR的影 响，并分析了子带滤波器组的参数对子带LCMV输出SINR性能的影响。仿真结果表明子带LCMV 算法可有效提高性能，并可在不降低性能的条件下降低阵元需求。

Performance Analysis of LCMV Wideband Beamforming With Sensor Delay Lines in Sub bands

Subband sensor delay lines (SDL) performance based on linearly constrained minim um variance (LCMV) adaptive wideband beamforming algorithm is analyzed. The outp ut signal to interference plus noise ratio (SINR) of subband LCMV algorithm is derived. The performance of fullband LCMV beamforming and subband LCMV beamfo rming is compared, including array response and output SINR with different numbe r of elements, input signal to noise ratio (SNR), and element spacing. Output S INR performance of subband LCMV beamforming with different parameters of subband filter banks is also analyzed. Simulation results verify that the subband LCMV algorithm improves its performace and reduces the element need at no cost of pe rformance.