Approximation of Toeplitz matrices with circulant matrices is a well-known approach to reduce the computational complexity of linear equalizers. This paper presents a novel technique to compute linear equalizer coefficients in the frequency domain. It is shown how a regularization term can help to reduce the error caused by the frequency domain approximation. A corresponding VLSI implementation provides reference for the true silicon complexity and for the complexity increase associated with the proposed algorithm.
Edoardo Charbon, Claudio Bruschini, Emanuele Ripiccini, Andrada Alexandra Muntean
Michael Herzog, Christian Sachse, Adrien Christophe Doerig