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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) 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)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
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)
conference location
Toronto, Canada
conference dates
2011-09-11
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
2019-04-30 18:28:44
@inproceedings{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},
  location     = {Toronto, Canada},
  pages        = {1718--1722},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Low Complexity Soft-Output Signal Detector for Spatial-Multiplexing MIMO System},
  year         = {2011},
}