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Suboptimal Linear MMSE Equalizers With Minimum Redundancy

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2 Author(s)
Martins, W.A. ; Electr. Eng. Program, Fed. Univ. of Rio de Janeiro, Rio de Janeiro, Brazil ; Diniz, P.S.R.

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.

Published in:

Signal Processing Letters, IEEE  (Volume:17 ,  Issue: 4 )