基于新型简化混频模型的实时DSP盲信号分离实验系统

Peiyu He, P. Sommen, B. Yin
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引用次数: 6

摘要

利用TMS320C40 DSP和LabVIEW虚拟仪器软件,设计并实现了实时盲信号分离实验系统。该系统基于我们最近提出的一种新的简化混合模型。简化模型利用了这样一个事实,即从单个声源到两个紧密间隔(彼此相距约10厘米)的麦克风的声传递函数非常相似。只需要这两个传递函数的差。该DSP系统的主要功能是利用测量到的一个信号源对两个传声器的脉冲响应差(DIR)来实现实时盲信号分离。实时实验结果表明,所提出的简化混合模型是可行的。特别是,通过引入时间延迟来解决非最小相传递函数的逆问题,可以大大提高盲分离性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A real-time DSP blind signal separation experimental system based on a new simplified mixing model
A real-time blind signal separation experimental system has been designed and implemented using TMS320C40 DSP and LabVIEW virtual instruments software. The system is based on a new simplified mixing model that we proposed recently. The simplified model uses the fact that the acoustic transfer functions from a single source to two closely spaced (approximately several 10 cm apart from each other) microphones are very similar. Only the difference between these two transfer functions is needed. The main function of this DSP system is using the measured difference between two impulse responses (DIR) from one source to two microphones to realize the real-time blind signal separation. The real-time experimental results have shown that the proposed simplified mixing model is feasible. In particular, the blind separation performance can be improved considerably by introducing a time delay to solve the inverse problem of a non-minimum phase transfer function.
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