Proceedings ArticleDOI
Processor-efficient FFT Implementation Scheme for Active Noise Control Applications
P. Vikram Kumar,K.M.M. Prabhu,Debi Prasad Das +2 more
- pp 134-140
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TLDR
An alternative method to compute the DFT is proposed, which distributes the computations over a span of several sampling instants, and is applied to the reduced delay-less frequency-domain block filtered-x least-mean-square algorithm.Abstract:
Most of the frequency-domain (FD)-based active noise control (ANC) applications involve the computation of several discrete Fourier transforms (DFTs). Conventionally, an N-point DFT of a sequentially arriving data is computed only after the arrival of the N th sample. For applications involving ANC, such an approach will overload the processor. In this paper, an alternative method to compute the DFT is proposed, which distributes the computations over a span of several sampling instants. As an example to prove the efficiency of the proposed algorithm, it is applied to the reduced delay-less frequency-domain block filtered-x least-mean-square (RD-FBFXLMS) algorithm, wherein about 24% (for a block length of 1024 samples) of the multiplications and about 29% of additions (which were supposed to have been done at the last sampling instant of each block) are shifted to earlier sampling instants during which the processor is idle. The percentage of computational redistribution will be higher for multi channel non-linear systems.read more
Citations
More filters
Proceedings ArticleDOI
A New Twiddle Factor Merging Method for Low Complexity and High Speed FFT Architecture
TL;DR: A new 16-point FFT architecture is designed and a twiddle factor merging method is proposed to reduce the number of multiplications, additions and subtractions used in the design.
References
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Book
Discrete-Time Signal Processing
TL;DR: In this paper, the authors provide a thorough treatment of the fundamental theorems and properties of discrete-time linear systems, filtering, sampling, and discrete time Fourier analysis.
Book
Active Noise Control Systems: Algorithms and DSP Implementations
Sen M. Kuo,Dennis R. Morgan +1 more
TL;DR: For practicing engineers, researchers, and advanced students in signal processing, Active Noise Control Systems: Algorithms and DSP Implementations will serve as a comprehensive, state-of-the-art text/reference on this important and rapidly changing area of signal processing.
Journal ArticleDOI
Fast implementations of the filtered-X LMS and LMS algorithms for multichannel active noise control
TL;DR: A fast, exact implementation of the filtered-X least mean square adaptive filter for which the system's complexity scales according to the number of filter coefficients within the system is developed.
Journal ArticleDOI
New block filtered-X LMS algorithms for active noise control systems
TL;DR: In this article, the authors proposed a transform-domain active noise control (ANC) algorithm using only convolution machines, which is different from conventional block least-mean-square (LMS) algorithms that use both convolution and cross-correlation machines.
Proceedings ArticleDOI
Development of Frequency Domain Block Filtered-s LMS (FBFSLMS) Algorithm for Active Noise Control System
TL;DR: A frequency domain block implementation of the filtered-s LMS algorithm is proposed to achieve computational advantage and is the exact implementation ofThe FSLMS algorithm but with reduced complexity.
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