22.1 Frequency Domain GSC with Low Computational Complexity
نویسندگان
چکیده
| The frequency domain generalized sidelobe canceller(FLMS-GSC) removes the interference signals rapidly by using the frequency domain least mean square (FLMS) algorithm. However,it, requires a lot of computational complexity. In this paper, a new realization of the frequency domain GSC, called censored-GSC (C-GSC), to reduce the computational complexity of the frequency domain GSC is proposed. During some initial times C-GSC decides weights to be updated by using cell-averaging constant false alarm rate (CA-CFAR) algorithm. Then, the C-GSC updates only the selected weights. Simulation results show that the C-GSC removes the interference signals more rapidly than the conventional GSC without degradation of mean square error (MSE) performance. Hence, it has much less computational complexity than that of the conventional GSC.
منابع مشابه
Frequency-domain integration of acoustic echo cancellation and a generalized sidelobe canceller with improved robustness
For hands-free acoustic human/machine interfaces, as required, e.g., for automatic speech recognition, teleconferencing, and other multimedia services, microphone arrays using generalized sidelobe cancellers (GSCs) in conjunction with acoustic echo cancellation (AEC) can be efficiently applied for optimum communication. This contribution first devises a new structure for combining AEC and GSC i...
متن کاملEfficient frequency-domain realization of robust generalized, sidelobe cancellers
This paper deals with hands-free acoustical front-ends for human/machine interaction in competing talker situations using efcient frequency-domain implementations of a robust Generalized Sidelobe Canceller (GSC). A new scheme is devised which leads to a factor of three of computational savings. The GSC tracking behavior is not impaired as the block lengths are kept suÆciently small. INTRODUCTIO...
متن کاملComputationally efficient frequency-domain combination of acoustic echo cancellation and robust adaptive beamforming
For hands-free acoustical human/machine interfaces, e. g. for automatic speech recognition or teleconferencing systems, microphone arrays using robust Generalized Sidelobe Cancellers (GSCs) in conjunction with acoustic echo cancellation (AEC) can be efficiently applied for optimum communication. This contribution devises a new structure for combining AEC and GSC. It reduces the computational co...
متن کاملDesign of a robust multi-microphone noise reduction algorithm for hearing instruments
This paper discusses the design and low-cost implementation of a robust multi-microphone noise reduction scheme, called the Spatially Pre-processed Speech Distortion Weighted Multi-channel Wiener Filter (SP-SDW-MWF). This scheme consists of two parts: a robust fixed spatial pre-processor and a robust adaptive Multi-channel Wiener Filter (MWF). Robustness against signal model errors is achieved ...
متن کاملICA 2010 paper
Our research is to develop the low-complexity broadband microphone beamformer which has robustness to moving interference signal. In this paper, an improved broadband GSC-RLS beamformer structure with fast self-tuning algorithm is proposed. Also, the improved fast self-tuning algorithm for the proposed GSC-RLS structure is developed, based on the Song‟s method. The computational complexity of t...
متن کامل