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Low Complexity Soft-Output Signal Detector for Spatial-Multiplexing MIMO System

Liu, Liang LU ; Löfgren, Johan LU and Nilsson, Peter LU (2011) 22nd Annual IEEE symposium on Personal Indoor Mobile Radio Communications (PIMRC 2011) In 2011 IEEE 22ND INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) p.1718-1722
Abstract
This paper presents a cost-efficient soft-output signal detector design solution targeting on the spatial-multiplexing MIMO system. The detector achieves low hardware cost and near-optimal detection performance based on the modification to the fixed-complexity sphere decoder (FSD) using several implementation-oriented algorithm-level improvements, which are early-pruning with polygon-shaped constraint, symbol-level bit-flipping, and l1-norm approximation. To evaluate the proposed method, we implement the MIMO detector in a 65-nm standard VT CMOS technology. The core area is 0.14 mm2 with 69 K equivalent gates, representing a 60% hardware-resource saving to the state of art in the open literature. The detecting throughput is up to 1.5Gb/s... (More)
This paper presents a cost-efficient soft-output signal detector design solution targeting on the spatial-multiplexing MIMO system. The detector achieves low hardware cost and near-optimal detection performance based on the modification to the fixed-complexity sphere decoder (FSD) using several implementation-oriented algorithm-level improvements, which are early-pruning with polygon-shaped constraint, symbol-level bit-flipping, and l1-norm approximation. To evaluate the proposed method, we implement the MIMO detector in a 65-nm standard VT CMOS technology. The core area is 0.14 mm2 with 69 K equivalent gates, representing a 60% hardware-resource saving to the state of art in the open literature. The detecting throughput is up to 1.5Gb/s at 250-MHz clock frequency and 1.2-V supply. The normalized energy consumption of 36.4 pJ/b is shown to be the most energy-efficient design compared with other soft-output detectors. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
2011 IEEE 22ND INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)
pages
1718 - 1722
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
22nd Annual IEEE symposium on Personal Indoor Mobile Radio Communications (PIMRC 2011)
external identifiers
  • WOS:000300719700333
  • Scopus:84863279208
ISBN
978-1-4577-1348-4
language
English
LU publication?
yes
id
85b2047c-c018-48c3-b70a-61bbe336d691 (old id 1981930)
date added to LUP
2011-06-27 11:14:16
date last changed
2016-10-13 04:44:13
@misc{85b2047c-c018-48c3-b70a-61bbe336d691,
  abstract     = {This paper presents a cost-efficient soft-output signal detector design solution targeting on the spatial-multiplexing MIMO system. The detector achieves low hardware cost and near-optimal detection performance based on the modification to the fixed-complexity sphere decoder (FSD) using several implementation-oriented algorithm-level improvements, which are early-pruning with polygon-shaped constraint, symbol-level bit-flipping, and l1-norm approximation. To evaluate the proposed method, we implement the MIMO detector in a 65-nm standard VT CMOS technology. The core area is 0.14 mm2 with 69 K equivalent gates, representing a 60% hardware-resource saving to the state of art in the open literature. The detecting throughput is up to 1.5Gb/s at 250-MHz clock frequency and 1.2-V supply. The normalized energy consumption of 36.4 pJ/b is shown to be the most energy-efficient design compared with other soft-output detectors.},
  author       = {Liu, Liang and Löfgren, Johan and Nilsson, Peter},
  isbn         = {978-1-4577-1348-4},
  language     = {eng},
  pages        = {1718--1722},
  publisher    = {ARRAY(0xdb58df0)},
  series       = {2011 IEEE 22ND INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)},
  title        = {Low Complexity Soft-Output Signal Detector for Spatial-Multiplexing MIMO System},
  year         = {2011},
}