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Energy Efficient SQRD Processor for LTE-A using a Group-sort Update Scheme

Zhang, Chenxin LU ; Prabhu, Hemanth LU ; Liu, Liang LU ; Edfors, Ove LU and Öwall, Viktor LU (2014) IEEE International Symposium on Circuits and Systems (ISCAS), 2014 In [Host publication title missing] p.193-196
Abstract
This paper presents an energy-efficient sorted QR decomposition (SQRD) processor for 3GPP LTE-Advanced (LTE-A) systems. The processor adopts a hybrid decomposition scheme to reduce computational complexity and provides a wide-range of performance complexity trade-offs. Based on the energy distribution of spatial channels, it switches between the brute-force SQRD and a low-complexity group-sort QR-update strategy, which is proposed in this work to effectively utilize the LTE-A pilot pattern. As a proof of concept, a run-time reconfigurable vector processor is developed to efficiently implement this adaptive-switching QR decomposition algorithm. In a 65nm CMOS technology, the proposed SQRD processor occupies 0.71 mm2 core area and has a... (More)
This paper presents an energy-efficient sorted QR decomposition (SQRD) processor for 3GPP LTE-Advanced (LTE-A) systems. The processor adopts a hybrid decomposition scheme to reduce computational complexity and provides a wide-range of performance complexity trade-offs. Based on the energy distribution of spatial channels, it switches between the brute-force SQRD and a low-complexity group-sort QR-update strategy, which is proposed in this work to effectively utilize the LTE-A pilot pattern. As a proof of concept, a run-time reconfigurable vector processor is developed to efficiently implement this adaptive-switching QR decomposition algorithm. In a 65nm CMOS technology, the proposed SQRD processor occupies 0.71 mm2 core area and has a throughput of up to 100MQRD/s. Compared to the brute-force approach, an energy reduction of 5~33% is achieved. (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
keywords
QR decomposition, Sorted QRD, LTE-A, MIMO, Energy
in
[Host publication title missing]
pages
4 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Symposium on Circuits and Systems (ISCAS), 2014
external identifiers
  • wos:000346488600047
  • scopus:84907400358
ISSN
0271-4310
2158-1525
ISBN
978-1-4799-3431-7
DOI
10.1109/ISCAS.2014.6865098
project
HiPEC
EIT_SOS VINNOVA Industrial Excellence Center - System Design on Silicon
language
English
LU publication?
yes
id
92c2b694-6ca9-4785-9afc-db2302603dd3 (old id 4254739)
date added to LUP
2014-01-29 12:13:06
date last changed
2017-03-19 03:18:10
@inproceedings{92c2b694-6ca9-4785-9afc-db2302603dd3,
  abstract     = {This paper presents an energy-efficient sorted QR decomposition (SQRD) processor for 3GPP LTE-Advanced (LTE-A) systems. The processor adopts a hybrid decomposition scheme to reduce computational complexity and provides a wide-range of performance complexity trade-offs. Based on the energy distribution of spatial channels, it switches between the brute-force SQRD and a low-complexity group-sort QR-update strategy, which is proposed in this work to effectively utilize the LTE-A pilot pattern. As a proof of concept, a run-time reconfigurable vector processor is developed to efficiently implement this adaptive-switching QR decomposition algorithm. In a 65nm CMOS technology, the proposed SQRD processor occupies 0.71 mm2 core area and has a throughput of up to 100MQRD/s. Compared to the brute-force approach, an energy reduction of 5~33% is achieved.},
  author       = {Zhang, Chenxin and Prabhu, Hemanth and Liu, Liang and Edfors, Ove and Öwall, Viktor},
  booktitle    = {[Host publication title missing]},
  isbn         = {978-1-4799-3431-7},
  issn         = {0271-4310},
  keyword      = {QR decomposition,Sorted QRD,LTE-A,MIMO,Energy},
  language     = {eng},
  pages        = {193--196},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Energy Efficient SQRD Processor for LTE-A using a Group-sort Update Scheme},
  url          = {http://dx.doi.org/10.1109/ISCAS.2014.6865098},
  year         = {2014},
}