摘要
针对次级通路时变条件下的快速算法展开研究。首先分析了已有的基于次级通路在线建模的FxLMS算法,同时给出了带策略选择的权系数局布迭代算法;在此基础上,提出了一种针对次级通路在线建模的带策略选择的局布迭代有源控制快速算法。给出了该快速算法的实现步骤;比较了不同算法的运算量;就次级通路为时变与非时变两种情况下对算法进行了计算机仿真。结果表明,本文提出的快速算法能有效地降低原算法的运算量,提高原算法次级通路在线建模部分的性能,并可在稳态时取得较原算法更优的降噪量。
The research is focusing on the fast algorithm under the condition of time varying in secondary path. First, the existed FxLMS algorithm based on on-line modeling in secondary path and the partial-update based fast algorithm with selective strategy are analyzed. Then, based on the partial update and selective strategy, a new fast algorithm applied to adaptive active noise control algorithm with on-online secondary path modeling is proposed. The implementation procedures of the proposed algorithm are given, and a comparison study on computational load between the existed and the proposed algorithm is accomplished. It is shown from computer simulations that the new fast algorithm is effective for complexity reduction, the performance of the on-line modeling in secondary path is improved, and better noise reduction can be achieved in steady state.
出处
《电子测量技术》
2007年第8期48-52,106,共6页
Electronic Measurement Technology
关键词
有源噪声控制
次级通路建模
快速算法
active noise control
secondary path modeling
fast algorithm
