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Fixed Complexity Soft-Output Detection Algorithm Through Exploration and Exploitation Processes

Authors:
Bastien Trotobas
Amor Nafkha

Keywords: MIMO detection; sphere-decoding; soft demodulation

Abstract:
In this paper, we propose a soft-output Multiple-Input and Multiple-Output (MIMO) detector algorithm, which is based on two complementary techniques: exploration and exploitation. The proposed detector, called List Exploration and Exploitation (L2E), achieves near-optimal performance with low and fixed computational complexity. It has a high parallelism degree, which makes it suitable for efficient practical implementation. The soft-output values are calculated by means of squared Euclidean distances in a max-Log Likelihood Ratio (LLR) approximation. The average Bit Error Rate (BER) performances of the L2E are compared to the well-known List Sphere Decoding (LSD) algorithm and it is shown that our method considerably reduces the computation complexity while maintaining near-optimal performance in comparison to LSD algorithm.

Pages: 89 to 93

Copyright: Copyright (c) IARIA, 2018

Publication date: July 22, 2018

Published in: conference

ISSN: 2308-4030

ISBN: 978-1-61208-650-7

Location: Barcelona, Spain

Dates: from July 22, 2018 to July 26, 2018