为达到最优的滤波效果,在对自适应滤波器结构、算法研究的基础上,利用DSP、A/D和D/A技术构建了验证信号处理算法的硬件平台,并通过DSP的软件编程,完成了自适应滤波算法的工程实现,对LMS自适应滤波算法的滤波效果进行了验证和分析。测试表明,随着信噪比的降低,自适应滤波器的性能也随之下降,当信噪比为0dB时,LMS自适应滤波算法不能完成滤波的功能。
In order to achieve the best filtering effect, on the basis of researching of adaptive filter architecture and algorithm, building the hardware platform of verify signal processing algorithm using DSP, A/D and D/A technology, and through DSP software programming done Engineering realization of adaptive filtering algorithm, then filter effect of LMS adaptive filter algorithm is verified and analyzed. Tests show that performance of adaptive filter descends with the descending of the SNR, and when the SNR is 0dB, LMS adaptive filtering algorithm cannot realize filtering function.