Low-Complexity Concatenated Soft-In Soft-Out Detector for Spreading OFDM Systems
Summary :
This paper proposes a low-complexity concatenated (LCC) soft-in soft-out (SISO) detector for spreading OFDM systems. The LCC SISO detector uses the turbo principle to compute the extrinsic information of the optimal maximum a priori probability (MAP) SISO detector with extremely low complexity. To develop the LCC SISO detector, we first partition the spreading matrix into some concatenated sparse matrices separated by interleavers. Then, we use the turbo principle to concatenate some SISO detectors, which are separated by de-interleavers or interleavers. Each SISO detector computes the soft information for each sparse matrix. By exchanging the soft information between the SISO detectors, we find the extrinsic information of the MAP SISO detector with extremely low complexity. Simulation results show that using the LCC SISO detector produces a near-optimal performance for both uncoded and coded spreading OFDM systems. In addition, by using the LCC SISO detector, the spreading OFDM system significantly improves the BER of the conventional OFDM system.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E95-B No.11 pp.3480-3491
- Publication Date
- 2012/11/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E95.B.3480
- Type of Manuscript
- PAPER
- Category
- Wireless Communication Technologies
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Keyword
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Huan-Chun WANG, De-Jhen HUANG, "Low-Complexity Concatenated Soft-In Soft-Out Detector for Spreading OFDM Systems" in IEICE TRANSACTIONS on Communications,
vol. E95-B, no. 11, pp. 3480-3491, November 2012, doi: 10.1587/transcom.E95.B.3480.
Abstract: This paper proposes a low-complexity concatenated (LCC) soft-in soft-out (SISO) detector for spreading OFDM systems. The LCC SISO detector uses the turbo principle to compute the extrinsic information of the optimal maximum a priori probability (MAP) SISO detector with extremely low complexity. To develop the LCC SISO detector, we first partition the spreading matrix into some concatenated sparse matrices separated by interleavers. Then, we use the turbo principle to concatenate some SISO detectors, which are separated by de-interleavers or interleavers. Each SISO detector computes the soft information for each sparse matrix. By exchanging the soft information between the SISO detectors, we find the extrinsic information of the MAP SISO detector with extremely low complexity. Simulation results show that using the LCC SISO detector produces a near-optimal performance for both uncoded and coded spreading OFDM systems. In addition, by using the LCC SISO detector, the spreading OFDM system significantly improves the BER of the conventional OFDM system.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E95.B.3480/_p
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@ARTICLE{e95-b_11_3480,
author={Huan-Chun WANG, De-Jhen HUANG, },
journal={IEICE TRANSACTIONS on Communications},
title={Low-Complexity Concatenated Soft-In Soft-Out Detector for Spreading OFDM Systems},
year={2012},
volume={E95-B},
number={11},
pages={3480-3491},
abstract={This paper proposes a low-complexity concatenated (LCC) soft-in soft-out (SISO) detector for spreading OFDM systems. The LCC SISO detector uses the turbo principle to compute the extrinsic information of the optimal maximum a priori probability (MAP) SISO detector with extremely low complexity. To develop the LCC SISO detector, we first partition the spreading matrix into some concatenated sparse matrices separated by interleavers. Then, we use the turbo principle to concatenate some SISO detectors, which are separated by de-interleavers or interleavers. Each SISO detector computes the soft information for each sparse matrix. By exchanging the soft information between the SISO detectors, we find the extrinsic information of the MAP SISO detector with extremely low complexity. Simulation results show that using the LCC SISO detector produces a near-optimal performance for both uncoded and coded spreading OFDM systems. In addition, by using the LCC SISO detector, the spreading OFDM system significantly improves the BER of the conventional OFDM system.},
keywords={},
doi={10.1587/transcom.E95.B.3480},
ISSN={1745-1345},
month={November},}
Copy
TY - JOUR
TI - Low-Complexity Concatenated Soft-In Soft-Out Detector for Spreading OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 3480
EP - 3491
AU - Huan-Chun WANG
AU - De-Jhen HUANG
PY - 2012
DO - 10.1587/transcom.E95.B.3480
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E95-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2012
AB - This paper proposes a low-complexity concatenated (LCC) soft-in soft-out (SISO) detector for spreading OFDM systems. The LCC SISO detector uses the turbo principle to compute the extrinsic information of the optimal maximum a priori probability (MAP) SISO detector with extremely low complexity. To develop the LCC SISO detector, we first partition the spreading matrix into some concatenated sparse matrices separated by interleavers. Then, we use the turbo principle to concatenate some SISO detectors, which are separated by de-interleavers or interleavers. Each SISO detector computes the soft information for each sparse matrix. By exchanging the soft information between the SISO detectors, we find the extrinsic information of the MAP SISO detector with extremely low complexity. Simulation results show that using the LCC SISO detector produces a near-optimal performance for both uncoded and coded spreading OFDM systems. In addition, by using the LCC SISO detector, the spreading OFDM system significantly improves the BER of the conventional OFDM system.
ER -
English
