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http://dx.doi.org/10.7236/JIWIT.2011.11.5.027

Performance Improvement of MCMA Equalizer with Parallel Structure  

Yoon, Jae-Sun (공주대학교 정보통신공학부)
Lim, Seung-Gag (공주대학교 정보통신공학부)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.11, no.5, 2011 , pp. 27-33 More about this Journal
Abstract
In digital communication system that the Modified Constant Modulus Algorithm (MCMA) reduced the use of the adaptive equalization algorithm to combat the Inter-symbol Interference (ISI). MCMA is relatively brief operation. The major point of MCMA that it only achieves moderate convergence rate and steady state mean square error (MSE). In this paper suggest, MCMA equalization improve the performance with parallel structure. It combines Modified Constant Modulus Algorithm(MCMA) and Modified Decision Directed(MDD) algorithm. By exploiting the inherent structural relationship between the 4-QAM signal's coordinates and 16-QAM signal's coordinates, another style of cost function for Modified Constant Modulus Algorithm(MCMA) is defined and If it happen to offset of received signals and MCMA is poor performance in order to overcome this because the paper combines apply for MCMA and MDD(Modified Decision Direct) algorithm. By computer simulation, we confirmed that the proposed PMCMA-MDD algorithm has the fater convergence rate and steady mean square error than the conventional MCMA.
Keywords
Inter-Symbol Interference; Mean Square Error; Constant Modulus Algorithm; Decision Directed;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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