Title :
Semi-blind data-selective equalizers for QAM
Author :
Martins, Wallace A. ; Lima, Markus V S ; Diniz, Paulo S R
Author_Institution :
LPS - Signal Process. Lab., Fed. Univ. of Rio de Janeiro, Rio de Janeiro
Abstract :
This paper proposes a new semi-blind data-selective affine-projection algorithm for channel equalization considering that the transmitted symbols belong to an M-QAM constellation. The main novelties of this algorithm are the combination of the affine-projection (AP) and set-membership (SM) concepts with the formulation of an error measure that is related to a square region (in the complex plane) centered at an element of the constellation. Simulations show that the proposed algorithm tracks slow channel variations as fast as a supervised algorithm, requiring less updates and keeping good BER performance.
Keywords :
blind equalisers; error statistics; quadrature amplitude modulation; set theory; telecommunication channels; BER; QAM; affine-projection algorithm; bit error rate; channel equalization; quadrature amplitude modulation; semi-blind data-selective equalizers; set-membership concept; Bit error rate; Blind equalizers; Constellation diagram; Filtering; Filters; Laboratories; Quadrature amplitude modulation; Region 4; Samarium; Signal processing algorithms;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2008. SPAWC 2008. IEEE 9th Workshop on
Conference_Location :
Recife
Print_ISBN :
978-1-4244-2045-2
Electronic_ISBN :
978-1-4244-2046-9
DOI :
10.1109/SPAWC.2008.4641658
