A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications
VLSI implementation of a configurable power-efficient MIMO detector is proposed to support 4×4 spatial multiplexing and modulation from QPSK to 64-QAM. A novel tree search algorithm is proposed to enable the detector to provide soft outputs and to be implemented in parallel and pipelined hardware ar...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/938490 |
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| _version_ | 1832558938656079872 |
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| author | Hsiao-Chi Wang Tung-Lin Liu Yuan-Wei Wu Hsi-Pin Ma |
| author_facet | Hsiao-Chi Wang Tung-Lin Liu Yuan-Wei Wu Hsi-Pin Ma |
| author_sort | Hsiao-Chi Wang |
| collection | DOAJ |
| description | VLSI implementation of a configurable power-efficient MIMO detector is proposed to support 4×4 spatial multiplexing and modulation from QPSK to 64-QAM. A novel tree search algorithm is proposed to enable the detector to provide soft outputs and to be implemented in parallel and pipelined hardware architecture. The frame error rate (FER) of the detector approaches the quasi-optimal sphere decoder, with 0.5-dB degradation. Moreover, the proposed detector can operate at the optimal voltage under different configurations and detect/recover timing error at run time by a novel adaptive voltage scaling technique with double sampling circuitry. The proposed detector, using TSMC 0.18 μm single-poly six-metal CMOS process with a core area of 1.17×1.17 mm2, provides fixed throughput of 45 Mbps in 64-QAM configuration, 120 Mbps in 16-QAM configuration, and 60 Mbps in QPSK configuration. The normalized power efficiency of the design for 64-QAM and 16-QAM configurations is 1.56 Mbps/mW and 2.53 Mbps/mW, respectively. Compared with the conservative margin-based design, the proposed design achieves a 48.8% power saving. |
| format | Article |
| id | doaj-art-7574031ff53c45a68d292079d2fbc176 |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-7574031ff53c45a68d292079d2fbc1762025-02-03T01:31:17ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552012-01-01201210.1155/2012/938490938490A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO CommunicationsHsiao-Chi Wang0Tung-Lin Liu1Yuan-Wei Wu2Hsi-Pin Ma3Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanVLSI implementation of a configurable power-efficient MIMO detector is proposed to support 4×4 spatial multiplexing and modulation from QPSK to 64-QAM. A novel tree search algorithm is proposed to enable the detector to provide soft outputs and to be implemented in parallel and pipelined hardware architecture. The frame error rate (FER) of the detector approaches the quasi-optimal sphere decoder, with 0.5-dB degradation. Moreover, the proposed detector can operate at the optimal voltage under different configurations and detect/recover timing error at run time by a novel adaptive voltage scaling technique with double sampling circuitry. The proposed detector, using TSMC 0.18 μm single-poly six-metal CMOS process with a core area of 1.17×1.17 mm2, provides fixed throughput of 45 Mbps in 64-QAM configuration, 120 Mbps in 16-QAM configuration, and 60 Mbps in QPSK configuration. The normalized power efficiency of the design for 64-QAM and 16-QAM configurations is 1.56 Mbps/mW and 2.53 Mbps/mW, respectively. Compared with the conservative margin-based design, the proposed design achieves a 48.8% power saving.http://dx.doi.org/10.1155/2012/938490 |
| spellingShingle | Hsiao-Chi Wang Tung-Lin Liu Yuan-Wei Wu Hsi-Pin Ma A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications Journal of Electrical and Computer Engineering |
| title | A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications |
| title_full | A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications |
| title_fullStr | A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications |
| title_full_unstemmed | A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications |
| title_short | A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications |
| title_sort | power efficient soft output detector for spatial multiplexing mimo communications |
| url | http://dx.doi.org/10.1155/2012/938490 |
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