Improving the performance of the error function for fast phase recovery of QAM signals in CMA blind equalizers using variable step

Sathyanarayan S. Rao; Priyadarshini Muddepal; Sudarshan Rao Nelatury

doi:10.1117/12.560637

Improving the performance of the error function for fast phase recovery of QAM signals in CMA blind equalizers using variable step

Sathyanarayan S. Rao, Priyadarshini Muddepal, Sudarshan Rao Nelatury

School of Engineering (Behrend)

Research output: Contribution to journal › Conference article › peer-review

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.

Original language	English (US)
Article number	37
Pages (from-to)	307-312
Number of pages	6
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5559
DOIs	https://doi.org/10.1117/12.560637
State	Published - Dec 1 2004
Event	Advanced Signal Processing Algorithms, Architectures, and Implementations XIV - Denver, CO, United States Duration: Aug 4 2004 → Aug 6 2004

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.560637

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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.",

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Improving the performance of the error function for fast phase recovery of QAM signals in CMA blind equalizers using variable step. / Rao, Sathyanarayan S.; Muddepal, Priyadarshini; Nelatury, Sudarshan Rao.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5559, 37, 01.12.2004, p. 307-312.

Research output: Contribution to journal › Conference article › peer-review

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T1 - Improving the performance of the error function for fast phase recovery of QAM signals in CMA blind equalizers using variable step

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AU - Muddepal, Priyadarshini

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PY - 2004/12/1

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N2 - 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.

AB - 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.

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

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Y2 - 4 August 2004 through 6 August 2004

ER -

Improving the performance of the error function for fast phase recovery of QAM signals in CMA blind equalizers using variable step

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All Science Journal Classification (ASJC) codes

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