一种新型的空间声回波消除器

空间声回波消除因回波通道冲激响应长达几百毫秒一直是信号处理领域的一个难题.本文设计了空间声回波消除器,提出了自正交轮流受限分段批处理频域LMS(PBFLMS)算法,可以达到收敛性能、失调性能、计算复杂度以及延时等性能之间的折衷,并结合空间声回波消除器的具体应用,改善了该算法。最后将空间声回波消除器在ATD-C30开发仿真系统中实现,得到了比较满意的结果.

A NEW ACOUSTIC ECHO CANCELLER

Because the impulse response of an acoustic echo path may be several hundred milliseconds long, acoustic echo cancellation is a long-stranding problem and has not been solved effectively. In order to solve this problem an acoustic echo canceller is presented and a new algorithm, self-orthogonalizing alternative constrained partitioned block frequency-domain LMS algorithm, is put forward in this paper. This algorithm has good convergence ability, small misadjustment, low computation complexity and small delay. In addition, according to the application on the acoustic echo canceller, this algorithm is modified. Finally the whole echo canceller is implemented by using a single TMS320C30 processor in the ATD-C30 simulator and satisfying results are acquired.