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Proceedings Paper

Improving the performance of the error function for fast phase recovery of QAM signals in CMA blind equalizers using variable step
Author(s): Sathyanarayan S. Rao; Priyadarshini Muddepal; Sudarshan Rao Nelatury
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Paper Abstract

A new constant modulus algorithm (CMA) type of error function for fast phase recovery of QAM signals was recently proposed in which the cost function of the error function recovers the phase simultaneously with the equalization. In this paper we propose variable step (VS) in the update equations of new error function to enhance the performance of convergence speed and residual inter-symbol interference (ISI). Effectiveness of the error function for well-behaved channel, under-modeled channel and channel disparity are presented. Simulation results are presented to compare the performance of VS, constant step (CS) and the modified CMA (MCMA) using 16-QAM signal constellation.

Paper Details

Date Published: 26 October 2004
PDF: 6 pages
Proc. SPIE 5559, Advanced Signal Processing Algorithms, Architectures, and Implementations XIV, (26 October 2004); doi: 10.1117/12.560637
Show Author Affiliations
Sathyanarayan S. Rao, Villanova Univ. (United States)
Priyadarshini Muddepal, Villanova Univ. (United States)
Sudarshan Rao Nelatury, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 5559:
Advanced Signal Processing Algorithms, Architectures, and Implementations XIV
Franklin T. Luk, Editor(s)

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