In this paper, two-stage BP detection is proposed for overloaded MIMO. The proposal combines BP with the MMSE pre-cancellation algorithm followed by normal BP detection. In overloaded MIMO systems, the loops in a factor graph degrade the demodulation performance of BP detection. MMSE pre-cancellation reduces the number of connections or coefficient values in the factor graph which improves the convergence characteristics of posteriori probabilities. Numerical results obtained through computer simulation show that the BERs of the proposed two-stage BP detection outperforms the conventional BP with MMSE pre-cancellation in a low bit energy range when the MMSE block size is four and the number of MMSE blocks is one. When the pre-cancellation is applied for complexity reduction, the proposed scheme reduces multiplication operations and summation operations by the same factor of 0.7 though the amount of the performance improvement to the conventional scheme is limited.
Risa SHIOI
Keio University
Takashi IMAMURA
Keio University
Yukitoshi SANADA
Keio University
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Risa SHIOI, Takashi IMAMURA, Yukitoshi SANADA, "Two-Stage Belief Propagation Detection with MMSE Pre-Cancellation for Overloaded MIMO" in IEICE TRANSACTIONS on Communications,
vol. E105-B, no. 3, pp. 309-317, March 2022, doi: 10.1587/transcom.2021EBP3046.
Abstract: In this paper, two-stage BP detection is proposed for overloaded MIMO. The proposal combines BP with the MMSE pre-cancellation algorithm followed by normal BP detection. In overloaded MIMO systems, the loops in a factor graph degrade the demodulation performance of BP detection. MMSE pre-cancellation reduces the number of connections or coefficient values in the factor graph which improves the convergence characteristics of posteriori probabilities. Numerical results obtained through computer simulation show that the BERs of the proposed two-stage BP detection outperforms the conventional BP with MMSE pre-cancellation in a low bit energy range when the MMSE block size is four and the number of MMSE blocks is one. When the pre-cancellation is applied for complexity reduction, the proposed scheme reduces multiplication operations and summation operations by the same factor of 0.7 though the amount of the performance improvement to the conventional scheme is limited.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2021EBP3046/_p
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@ARTICLE{e105-b_3_309,
author={Risa SHIOI, Takashi IMAMURA, Yukitoshi SANADA, },
journal={IEICE TRANSACTIONS on Communications},
title={Two-Stage Belief Propagation Detection with MMSE Pre-Cancellation for Overloaded MIMO},
year={2022},
volume={E105-B},
number={3},
pages={309-317},
abstract={In this paper, two-stage BP detection is proposed for overloaded MIMO. The proposal combines BP with the MMSE pre-cancellation algorithm followed by normal BP detection. In overloaded MIMO systems, the loops in a factor graph degrade the demodulation performance of BP detection. MMSE pre-cancellation reduces the number of connections or coefficient values in the factor graph which improves the convergence characteristics of posteriori probabilities. Numerical results obtained through computer simulation show that the BERs of the proposed two-stage BP detection outperforms the conventional BP with MMSE pre-cancellation in a low bit energy range when the MMSE block size is four and the number of MMSE blocks is one. When the pre-cancellation is applied for complexity reduction, the proposed scheme reduces multiplication operations and summation operations by the same factor of 0.7 though the amount of the performance improvement to the conventional scheme is limited.},
keywords={},
doi={10.1587/transcom.2021EBP3046},
ISSN={1745-1345},
month={March},}
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TY - JOUR
TI - Two-Stage Belief Propagation Detection with MMSE Pre-Cancellation for Overloaded MIMO
T2 - IEICE TRANSACTIONS on Communications
SP - 309
EP - 317
AU - Risa SHIOI
AU - Takashi IMAMURA
AU - Yukitoshi SANADA
PY - 2022
DO - 10.1587/transcom.2021EBP3046
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E105-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2022
AB - In this paper, two-stage BP detection is proposed for overloaded MIMO. The proposal combines BP with the MMSE pre-cancellation algorithm followed by normal BP detection. In overloaded MIMO systems, the loops in a factor graph degrade the demodulation performance of BP detection. MMSE pre-cancellation reduces the number of connections or coefficient values in the factor graph which improves the convergence characteristics of posteriori probabilities. Numerical results obtained through computer simulation show that the BERs of the proposed two-stage BP detection outperforms the conventional BP with MMSE pre-cancellation in a low bit energy range when the MMSE block size is four and the number of MMSE blocks is one. When the pre-cancellation is applied for complexity reduction, the proposed scheme reduces multiplication operations and summation operations by the same factor of 0.7 though the amount of the performance improvement to the conventional scheme is limited.
ER -