NDLI: Fast blind equalization by using frequency domain block constant modulus algorithm

Content Provider	IEEE Xplore Digital Library
Author	Yoon Gi Yang Nam Ik Cho Sang Uk Lee
Copyright Year	1995
Description	Author affiliation: Dept. of Control & Instrum. Eng., Seoul Nat. Univ., South Korea (Yoon Gi Yang)
Abstract	This paper presents fast algorithms for the CMA (constant modulus algorithm), which is one of the widely used blind equalization algorithms. To derive the fast algorithm of the CMA for high-speed equalization, we first introduce BCMA (block CMA) which adjusts the equalizer coefficients by block processing of the received symbols in the time domain. Based on the BCMA, we propose the FBCMA (frequency domain block CMA) which employs fast linear convolution in the DFT domain by using the overlap save method. In this paper, a non-linear error function in the frequency domain is derived using the Parseval's relation. Also, an adaptive algorithm in the DFT domain is developed to adjust the DFT domain filter coefficients. If the block size and filter length is N, the multiplications required for the conventional CMA and proposed FBCMA are in the order of O(N/sup 2/) and O(N log N), respectively. The computer simulations show that the proposed FBCMA presents comparable performance to the conventional CMA, while requiring less computations.
Starting Page	1003
Ending Page	1006
File Size	353428
Page Count	4
File Format	PDF
ISBN	0780329724
DOI	10.1109/MWSCAS.1995.510262
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-08-13
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Blind equalizers Frequency domain analysis Finite impulse response filter Adaptive filters Adaptive equalizers HDTV Instruments Adaptive algorithm Cost function Interference
Content Type	Text
Resource Type	Article

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