基于检测前跟踪的声源跟踪算法

摘要

In order to improve tracking performance in a noisy and reverberant environment,an acoustic source tracking algorithm using track before detect was proposed. This algorithm used a modified steered response power as localization function which take into account a rectangular region to achieve more robust source location estimation than steered re-sponse power function and applied track-before-detect technology to avoid reduplicate calculation of the same rectangu-lar region so that the algorithm could reduce the computation burden without decreasing the accuracy. The simulation re-sults verified that the proposed algorithm can achieve more accurate tracking results than traditional tracking algorithm in a noisy and reverberant environment.%针对低信噪比、强混响环境中声源跟踪误差较大的问题,提出一种基于检测前跟踪的声源跟踪算法.该算法将一种改进的可控响应功率函数作为定位函数,通过计算粒子所在矩形区域的可控响应功率值,改进的可控响应功率函数可以得到更加顽健的声源位置估计;同时,将检测前跟踪技术应用于跟踪算法中,可以免于重复计算处于同一区域的量测值,从而在保证跟踪精度的前提下大幅减少跟踪算法的运算量.经仿真实验验证,改进算法在低信噪比、强混响的环境中能够得到比传统跟踪算法更精确的跟踪结果.