柳雷雷 于玲

摘要：针对相位变换加权可控响应功率算法（SRP-PHAT）在噪声和混响增大时定位性能下降以及运算量大的问题，提出了一种基于改进可控响应功率算法的混合定位算法。首先利用五元十字形阵进行几何定位，得到粗略的定位结果，然后利用引入基于倒谱预滤波的二次互相关算法改进后的可控响应功率算法，在此定位结果的基础上进行精确的二次定位，通过雙步定位提高其定位速度。仿真结果表明：混合定位算法在抗混响和抗噪声的能力上要优于几何定位算法和SRP-PHAT算法，并且提高了可控响应功率算法的定位速度。

关键词：倒谱预滤波;二次互相关;混合定位;相位变换加权可控响应功率

中图分类号：TN911.7      文献标识码：A

文章编号：1009-3044（2021）35-0001-04

Hybrid Localization Algorithm Based on Improved Steered Response Power

LIU Lei-lei，YU Ling

（College of Electronic and Information Engineering， Liaoning University of Technology，Jingzhou 121001，China）

Abstract： Aiming at the problem that the phase transformation weighted steered response power algorithm has the poor positioning effect when the noise and reverberation increase and heavy computation， a hybrid localization algorithm based on improved steered response power algorithm is proposed. The five-element cross-shaped array is first used for geometric localization. A rough localization result is obtained. Then use the improved steered response power algorithm by introducing the second cross-correlation algorithm based on cepstral pre-filtering to search twice based on the localization result. Improve its positioning speed through two-step positioning. Simulation results show that： the hybrid localization algorithm is superior to the geometric localization algorithm and phase transformation weighted steered response power algorithm in terms of anti-reverberation and anti-noise ability. And the positioning speed of the steered response power algorithm is improved.

Key words： cepstral pre-filtering; second cross-correlation; hybrid localization; phase transformation weighted steered response power

基于麦克风阵列的声源定位技术是使用麦克风阵列作为工具对目标声源进行定位，具有良好隐蔽性、装置易实现、抗干扰性好的优点，在安防监控[1]、智能音箱[2]、无人机[3]、机器人[4]、助听器[5]等方面有很好的应用。

传统的声源定位算法可以大致分为两类：直接法和间接法。直接法有：高分辨率谱估计法，其中代表性的是多重信号分类法;可控波束形成法，其中代表性的是可控响应功率法。间接法有到达时间差法，该方法是双步定位，第一步是时延估计，方法有相关法、自适应时延估计法等;第二步是根据所得时延建立非线性定位方程，通过对其求解得到声源的位置，方法有球型插值法[6]、几何定位法等。几何……