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针对常见的信号分析与处理实验以对成熟理论的验证为主,缺乏综合性与应用性的问题,提出了基于有源主动降噪次级通道测量的信号分析与处理探究性实验设计。针对有源主动降噪中使用的前馈式自适应FXLMS滤波算法需要的次级通道参数,根据已有的降噪硬件输入输出系统,设计次级通道的测试方案,得到不同硬件条件下FXLMS算法需要的系统参数,从而完成整个主动降噪系统的搭建。该实验将信号分析与处理课程中的理论知识加以综合运用,具有较强的创新性与趣味性。
Aiming at the common signal analysis and processing experiment, which mainly focuses on the verification of mature theory, it lacks comprehensiveness and applicability, and proposes an experimental design of signal analysis and processing based on active active noise reduction secondary channel measurement. Aiming at the secondary channel parameters required by the feedforward adaptive FXLMS filtering algorithm used in active active noise reduction, a secondary channel test scheme is designed according to the existing noise reduction hardware input / output system, and the FXLMS algorithm under different hardware conditions Need the system parameter, thus finish the construction of the whole active noise reduction system. The experiment combines the theoretical knowledge of signal analysis and processing courses with a strong innovation and interest.