Title :
Suboptimal Linear MMSE Equalizers With Minimum Redundancy
Author :
Martins, Wallace A. ; Diniz, Paulo S R
Author_Institution :
Electr. Eng. Program, Fed. Univ. of Rio de Janeiro, Rio de Janeiro, Brazil
fDate :
4/1/2010 12:00:00 AM
Abstract :
Recent works have proposed practical zero-forcing (ZF) and linear minimum mean squared-error (LMMSE) solutions for fixed and memoryless block-based transceivers with minimum redundancy, using only half the amount of redundancy employed in standard systems. Their equalization processes require only O(M log2 M) operations. However, it may be difficult to apply LMMSE equalizers with minimum redundancy in some practical systems, given their higher number of operations. This letter proposes novel suboptimal LMMSE equalizers with minimum redundancy that require the same amount of computations of ZF equalizers, with a mild decrease in the throughput performance when compared to the optimal LMMSE solution.
Keywords :
OFDM modulation; equalisers; least mean squares methods; redundancy; transceivers; linear MMSE equalizer; linear minimum mean squared-error; memoryless block-based transceivers; redundancy; zero-forcing; Block transceivers; OFDM; displacement; equalization; minimum redundancy; superfast algorithms;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2010.2042515