IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516
Regular Section
Efficient Pruning for Infinity-Norm Sphere Decoding Based on Schnorr-Euchner Enumeration
Tae-Hwan KIMIn-Cheol PARK
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2011 Volume E94.B Issue 9 Pages 2677-2680

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Abstract

An efficient pruning method is proposed for the infinity-norm sphere decoding based on Schnorr-Euchner enumeration in multiple-input multiple-output spatial multiplexing systems. The proposed method is based on the characteristics of the infinity norm, and utilizes the information of the layer at which the infinity-norm value is selected in order to decide unnecessary sub-trees that can be pruned without affecting error-rate performance. Compared to conventional pruning, the proposed pruning decreases the average number of tree-visits by up to 37.16% in 4×4 16-QAM systems and 33.75% in 6×6 64-QAM systems.

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© 2011 The Institute of Electronics, Information and Communication Engineers
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