IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136
Cyclic path switching for lattice reduction-aided iterative linear receivers in overloaded MIMO systems
Satoshi DennoTakuya FujiwaraYafei Hou
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2021 Volume 10 Issue 10 Pages 810-815

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Abstract

This paper proposes a technique called “Cyclic path switching (CPS)” to improve the transmission performance of iterative linear receivers assisted with the lattice reduction in overloaded MIMO channels. The proposed CPS applies different parameters to the LLL algorithm, one of algorithms for the lattice reduction, in order to prepare two paths in the iterative linear receivers. The CPS cyclically switches the paths in the iteration process of the receiver, which is expected to randomize error bits and to improve the decoding performance in the proposed receiver. The CPS enables the iterative receiver to attain a gain of about 0.5dB at the packet error rate (PER) of 10-2in a 6×2 MIMO system with the 64 QAM, when the reception process is iterated 50 times, even though the CPS is implemented with little additional computational complexity.

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© 2021 The Institute of Electronics, Information and Communication Engineers
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