On Fast-Decodable Space-Time Block Codes

Details On Fast-Decodable Space-Time Block Codes On Fast-Decodable Space-Time Block Codes

2007-08-21

arxiv.org/abs/0708.2804v2

Computer Science

Information Theory

submitted to IEEE trans IT

Scientific paper

We focus on full-rate, fast-decodable space-time block codes (STBCs) for 2x2 and 4x2 multiple-input multiple-output (MIMO) transmission. We first derive conditions for reduced-complexity maximum-likelihood decoding, and apply them to a unified analysis of two families of 2x2 STBCs that were recently proposed. In particular, we describe a reduced-complexity sphere decoding algorithm suitable for QAM signal constellations. Next, we derive a novel reduced-complexity 4x2 STBC, and show that it outperforms all previously known codes with certain constellations.

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