基于SRV-CLS的稳健可控频率不变波束形成  

Robust Steerable Frequency Invariant Beamformer Design Based on SRV-CLS

作　　者：陈苏婷[1,2] 张伟[1] 

机构地区：[1]南京信息工程大学江苏省气象探测与信息处理重点实验室,江苏南京210044 [2]大气环境与装备技术协同创新中心,江苏南京210044

出　　处：《系统仿真学报》2016年第8期1898-1903,共6页Journal of System Simulation

基　　金：中国博士后科学基金(2011M500940);中国博士后特别资助基金(2012T50510);六大人才高峰资助(2013-DZXX-020);江苏省高校自然科学重大基础研究(12KJA510001)

摘　　要：频率不变波束形成器在宽带阵列信号处理中有着十分重要的应用。经典的频率不变波束形成器的设计方法没有考虑实际情况中麦克风通道间存在的失配误差,导致波束形成器在实际应用中的频率不变性能变差。为了解决该问题,提出一种基于SRV-CLS的稳健可控频率不变波束形成器的设计方法。该方法将基于SRV-CLS的频率不变波束形成器设计方法与宽带波束形成稳健算法的思想相结合,将麦克风特性的统计信息作为稳健因子加入代价函数中,有效克服了因麦克风通道间存在失配误差而引起的波束形成器性能变差,保证了在波束形成器在工作频带内的频率不变性良好,并且适用于任意阵列结构和具有任意主瓣形状的宽带波束形成器设计。The frequency invariant beamformer （FIB） has important applications in wideband array signal processing. Conventional FIB design approaches are usually proposed without considering the mismatches in microphone array characteristic, which leads to the performance of the FIBs degrading in practical applications. Therefore, a robust steerable frequency invariant beam former design approach based on spatial response variation constrained least squares （SRV-CLS） was proposed. It combined the SRV-CLS FIB design approach with classical robust beamforming algorithm, and added the microphone characteristics as robust favor in the cost function. The proposed approach could work well in the presence of microphone mismatches, ensured the frequency invariant of the beamformers in the operating band, and is applicable to arbitrary main lobe width and array geometries.

关 键 词：波束形成 频率不变 稳健性 约束最小二乘 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]