A Closed-Form Solution for the Finite Length Constant Modulus Receiver

Details A Closed-Form Solution for the Finite Length Constant Modulus Receiver A Closed-Form Solution for the Finite Length Constant Modulus Receiver

2005-08-29

arxiv.org/abs/cs/0508126v1

Computer Science

Computer Science and Game Theory

To appear in the proceedings of the 2005 IEEE International Symposium on Information Theory, Adelaide, Australia, September 4-

Scientific paper

In this paper, a closed-form solution minimizing the Godard or Constant Modulus (CM) cost function under the practical conditions of finite SNR and finite equalizer length is derived. While previous work has been reported by Zeng et al., IEEE Trans. Information Theory. 1998, to establish the link between the constant modulus and Wiener receivers, we show that under the Gaussian approximation of intersymbol interference at the output of the equalizer, the CM finite-length receiver is equivalent to the nonblind MMSE equalizer up to a complex gain factor. Some simulation results are provided to support the Gaussian approximation assumption.

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