基于子带分解的自适应回声抵消算法

Adaptive acoustic echo cancellation algorithm based on subband decomposition

针对通信系统中的声学回声干扰问题,研究了一种快速收敛和有效的自适应回声抵消算法。本文算法基于子带分解结构,利用频率分带技术,在各个子带上分别采用共轭梯度算法进行子带上的自适应滤波。在保证收敛性、提高收敛速度的同时相对降低了运算复杂度。仿真结果表明,本文算法在解决声学回声问题时具有较好的抵消效果。

An adaptive conjugate gradient algorithm based on subband decompsition structure was proposed for acoustic echo cancellation in communication systems.Through frequency decomposition technique and conjugate gradient algorithm,adaptive filters operate in each decimated subband.This proposed algorithm can ensure convergence with high speed and reduce computational complexity.Simulation results indicate that the algorithm demonstrates good performance for acoustic echo cancellation.