### 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 language | English (US) |
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Title of host publication | Proceedings of the 2003 IEEE Workshop on Statistical Signal Processing, SSP 2003 |

Publisher | IEEE Computer Society |

Pages | 70-73 |

Number of pages | 4 |

ISBN (Electronic) | 0780379977 |

DOIs | |

State | Published - Jan 1 2003 |

Event | IEEE Workshop on Statistical Signal Processing, SSP 2003 - St. Louis, United States Duration: Sep 28 2003 → Oct 1 2003 |

### Publication series

Name | IEEE Workshop on Statistical Signal Processing Proceedings |
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Volume | 2003-January |

### Other

Other | IEEE Workshop on Statistical Signal Processing, SSP 2003 |
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Country | United States |

City | St. Louis |

Period | 9/28/03 → 10/1/03 |

### All Science Journal Classification (ASJC) codes

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

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## 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*(pp. 70-73). [1289342] (IEEE Workshop on Statistical Signal Processing Proceedings; Vol. 2003-January). IEEE Computer Society. https://doi.org/10.1109/SSP.2003.1289342