TY - GEN
T1 - Low Complexity Soft Decoding with Superposition of Hard Decision Vectors in Lattice Reduction-Aided Linear Receivers
AU - Denno, Satoshi
AU - Kashihara, Koki
AU - Hou, Yafei
N1 - Funding Information:
This works was supported by JSPS KAKENHI Grant Number JP21K04061 and support center for advanced telecommunications technology research (SCAT).
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - This paper proposes a novel approach to low complexity soft input decoding for lattice reduction-aided MIMO receivers. The proposed approach feeds a soft input decoder with soft signals made from hard decision signals generated by using a lattice reduction-aided linear detector. The soft signal is a weighted-sum of some candidate vectors that are near by the hard decision signal coming out from the lattice reduction-aided linear detector. This paper proposes a technique to adjust the weight adapt to the channel for the higher transmission performance. The transmission performance is evaluated in a 4 x 4 MIMO channel. When a serial interference canceller is used as the linear detector, the proposed technique achieves about 2.0 dB better transmission performance at the BER of 10-5 than the decoder fed with the hard decision signals, even though the proposed soft input decoding can be implemented with small additional complexity.
AB - This paper proposes a novel approach to low complexity soft input decoding for lattice reduction-aided MIMO receivers. The proposed approach feeds a soft input decoder with soft signals made from hard decision signals generated by using a lattice reduction-aided linear detector. The soft signal is a weighted-sum of some candidate vectors that are near by the hard decision signal coming out from the lattice reduction-aided linear detector. This paper proposes a technique to adjust the weight adapt to the channel for the higher transmission performance. The transmission performance is evaluated in a 4 x 4 MIMO channel. When a serial interference canceller is used as the linear detector, the proposed technique achieves about 2.0 dB better transmission performance at the BER of 10-5 than the decoder fed with the hard decision signals, even though the proposed soft input decoding can be implemented with small additional complexity.
KW - lattice reduction
KW - linear detectors
KW - low computational complexity
KW - Soft decision
KW - Weighted sum
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U2 - 10.1109/PIMRC54779.2022.9977505
DO - 10.1109/PIMRC54779.2022.9977505
M3 - Conference contribution
AN - SCOPUS:85145663928
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
SP - 271
EP - 275
BT - 2022 IEEE 33rd Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 33rd IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2022
Y2 - 12 September 2022 through 15 September 2022
ER -