IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516
Regular Section
Efficient Soft-Output Generation Method for Spatially Multiplexed MIMO Systems
Junghyun KIMYoun-Ok PARKSeungjae BAHNG
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2009 Volume E92.B Issue 11 Pages 3512-3515

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Abstract

A simple detector named QR-LRL for MIMO systems was proposed in [7] and it was shown that QR-LRL approached the hard-output ML performance. However, its soft-output performance is not capable of approaching the near ML performance. In this letter, we propose a novel detection method which can generate reliable soft-outputs while avoiding the empty vector set problem. The proposed detector efficiently uses the upper triangular structure in QR decomposition. Simulation results show that the proposed detector can approach the near soft-output ML performance as well as hard-output with feasible complexity.

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© 2009 The Institute of Electronics, Information and Communication Engineers
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