【摘要】 针对目前近场环境下利用TDE(Time Delay Estimation)估计声源位置时无闭式表达式的情况,在分析声源不同方向上的坐标值对TDE误差的敏感度不同的基础上,利用声源在线阵列方向上的坐标值对TDE误差相对不敏感这一结论,提出了MOLA(Mutual Ortho-Linear Array)结构,给出了该阵列结构下融合一组TDE值的求解声源位置的闭式表达式。实验结果表明,在相同的TDE下,MOLA以及其对应的声源位置估计算法的估计误差小于全局搜索算法。MOLA估计位置时不需要计算出所有传声器对的TDE,且有闭式表达式,计算量小,适用于实时系统。更多还原

【Abstract】 Since there is no closed-form solution for near-field localization based on TDE(Time-Delay Estimation), a new array structure named MOLA(Mutual Ortho-Linear Array) is presented and the corresponding closed-form solution for the near-filed source′s position based on a group of TDEs is given. Firstly, sensitivities of source′s coordinate on different directions are analyzed. Then, base on MOLA, the conclusion that the coordinate on the direction of the linear array is less sensitive is given. Experimental results show that MOLA and the corresponding algorithm can get less position errors than GSA(Global Searching Algorithm) base on the same TDEs. TDEs of all potential microphone pairs needn′t to be calculated in MOLA, and there is closed-form algorithm which is suitable for the real-time system.更多还原