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A region-based algorithm for blind equalization of QAM signals

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4 Author(s)
Filho, Joao Mendes ; Escola Politec., Univ. of Sao Paulo, Sao Paulo, Brazil ; Silva, M.T.M. ; Miranda, M.D. ; Nascimento, V.H.

We propose a region-based multimodulus algorithm for blind equalization of high-order quadrature amplitude modulation (QAM) signals. It treats nonconstant modulus constellations as constant modulus ones, converging approximately to the Wiener solution. To avoid divergence, it rejects non-consistent estimates of the transmitted signal. When compared to existing blind multimodulus-type algorithms for equalization of QAM signals, it exhibits considerably lower misadjustment, faster convergence, good tracking capability, without compromising the computational cost. Its good behavior is illustrated through simulation results.

Published in:

Statistical Signal Processing, 2009. SSP '09. IEEE/SP 15th Workshop on

Date of Conference:

Aug. 31 2009-Sept. 3 2009