A new error function for fast phase recovery of QAM signals in CMA blind equalizers

S. R. Thakallapalli, Sudarshan Rao Nelatury, S. S. Rao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

A modification to the well-known constant modulus algorithm (CMA) for blind channel equalization is proposed. The conventional CMA has rotational ambiguity and hence cannot achieve carrier phase recovery. It happens because the cost function is made up of the absolute value of the equalizer output and phase information is not used. In this paper, we slightly modify the cost function and provide a different error function that restores the phase of the carrier. Simulations studies are shown for the case of 16-QAM signal constellation.

Original languageEnglish (US)
Title of host publicationProceedings of the 2003 IEEE Workshop on Statistical Signal Processing, SSP 2003
PublisherIEEE Computer Society
Pages70-73
Number of pages4
Volume2003-January
ISBN (Electronic)0780379977
DOIs
StatePublished - Jan 1 2003
EventIEEE Workshop on Statistical Signal Processing, SSP 2003 - St. Louis, United States
Duration: Sep 28 2003Oct 1 2003

Other

OtherIEEE Workshop on Statistical Signal Processing, SSP 2003
CountryUnited States
CitySt. Louis
Period9/28/0310/1/03

Fingerprint

Equalizer
Error function
Quadrature amplitude modulation
Equalizers
Cost functions
Modulus
Recovery
Cost Function
Channel Equalization
Blind Equalization
Absolute value
Simulation Study
Output

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Applied Mathematics
  • Signal Processing
  • Computer Science Applications

Cite this

Thakallapalli, S. R., Nelatury, S. R., & Rao, S. S. (2003). A new error function for fast phase recovery of QAM signals in CMA blind equalizers. In Proceedings of the 2003 IEEE Workshop on Statistical Signal Processing, SSP 2003 (Vol. 2003-January, pp. 70-73). [1289342] IEEE Computer Society. https://doi.org/10.1109/SSP.2003.1289342
Thakallapalli, S. R. ; Nelatury, Sudarshan Rao ; Rao, S. S. / A new error function for fast phase recovery of QAM signals in CMA blind equalizers. Proceedings of the 2003 IEEE Workshop on Statistical Signal Processing, SSP 2003. Vol. 2003-January IEEE Computer Society, 2003. pp. 70-73
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Thakallapalli, SR, Nelatury, SR & Rao, SS 2003, A new error function for fast phase recovery of QAM signals in CMA blind equalizers. in Proceedings of the 2003 IEEE Workshop on Statistical Signal Processing, SSP 2003. vol. 2003-January, 1289342, IEEE Computer Society, pp. 70-73, IEEE Workshop on Statistical Signal Processing, SSP 2003, St. Louis, United States, 9/28/03. https://doi.org/10.1109/SSP.2003.1289342

A new error function for fast phase recovery of QAM signals in CMA blind equalizers. / Thakallapalli, S. R.; Nelatury, Sudarshan Rao; Rao, S. S.

Proceedings of the 2003 IEEE Workshop on Statistical Signal Processing, SSP 2003. Vol. 2003-January IEEE Computer Society, 2003. p. 70-73 1289342.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Thakallapalli SR, Nelatury SR, Rao SS. A new error function for fast phase recovery of QAM signals in CMA blind equalizers. In Proceedings of the 2003 IEEE Workshop on Statistical Signal Processing, SSP 2003. Vol. 2003-January. IEEE Computer Society. 2003. p. 70-73. 1289342 https://doi.org/10.1109/SSP.2003.1289342