Energy Efficient SQRD Processor for LTE-A using a Group-sort Update Scheme
(2014) IEEE International Symposium on Circuits and Systems (ISCAS), 2014 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:
https://lup.lub.lu.se/record/4254739
- author
- Zhang, Chenxin
LU
; Prabhu, Hemanth
LU
; Liu, Liang
LU
; Edfors, Ove LU
and Öwall, Viktor LU
- organization
- publishing date
- 2014
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- QR decomposition, Sorted QRD, LTE-A, MIMO, Energy
- host publication
- [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
- conference location
- Melbourne, Australia
- conference dates
- 2014-06-01 - 2014-06-05
- external identifiers
-
- wos:000346488600047
- scopus:84907400358
- ISSN
- 2158-1525
- 0271-4310
- ISBN
- 978-1-4799-3431-7
- DOI
- 10.1109/ISCAS.2014.6865098
- project
- High Performance Embedded Computing
- 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
- 2016-04-01 10:59:00
- date last changed
- 2025-01-14 03:43:02
@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 = {{2158-1525}}, keywords = {{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 = {{https://lup.lub.lu.se/search/files/2284719/5385568.pdf}}, doi = {{10.1109/ISCAS.2014.6865098}}, year = {{2014}}, }