基于改进可控响应功率算法的混合定位算法

Hybrid Localization Algorithm Based on Improved Steered Response Power

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,通过双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SRPPHAT算法,并且提高了可控响应功率算法的定位速度。

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 twostep 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.