Energy Efficient MIMO Channel Pre-processor Using a Low Complexity On-Line Update Scheme
(2012) Norchip conference, 2012- Abstract
- This paper presents a low-complexity energy efficient channel pre-processing update scheme, targeting the emerging 3GPP long term evolution advanced (LTE-A) downlink. Upon channel matrix renewals, the number of explicit QR decompositions (QRD) and channel matrix inversions are reduced since only the upper triangular matrices R and R^-1 are updated, based on an on-line update decision mechanism. The proposed channel pre-processing updater has been designed as a dedicated unit in a 65nm CMOS technology, resulting in a core area of 0.242mm2 (equivalent gate count of 116K). Running at a 330MHz clock, each QRD or R^-1 update consumes 4 or 2 times less energy compared to one exact state-of-the-art QRD in open literature.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3128242
- author
- Zhang, Chenxin LU ; Prabhu, Hemanth LU ; Liu, Liang LU ; Edfors, Ove LU and Öwall, Viktor LU
- organization
- publishing date
- 2012
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Channel pre-processing, QR decomposition, MIMO, QR update
- host publication
- [Host publication title missing]
- pages
- 4 pages
- conference name
- Norchip conference, 2012
- conference location
- Copenhagen, Denmark
- conference dates
- 2012-11-12 - 2012-11-13
- external identifiers
-
- scopus:84873549591
- DOI
- 10.1109/NORCHP.2012.6403103
- project
- High Performance Embedded Computing
- EIT_SOS VINNOVA Industrial Excellence Center - System Design on Silicon
- language
- English
- LU publication?
- yes
- id
- c38f7bdc-e5f5-4292-8d48-d09dd7dceed4 (old id 3128242)
- date added to LUP
- 2016-04-04 13:02:57
- date last changed
- 2024-01-13 05:46:06
@inproceedings{c38f7bdc-e5f5-4292-8d48-d09dd7dceed4, abstract = {{This paper presents a low-complexity energy efficient channel pre-processing update scheme, targeting the emerging 3GPP long term evolution advanced (LTE-A) downlink. Upon channel matrix renewals, the number of explicit QR decompositions (QRD) and channel matrix inversions are reduced since only the upper triangular matrices R and R^-1 are updated, based on an on-line update decision mechanism. The proposed channel pre-processing updater has been designed as a dedicated unit in a 65nm CMOS technology, resulting in a core area of 0.242mm2 (equivalent gate count of 116K). Running at a 330MHz clock, each QRD or R^-1 update consumes 4 or 2 times less energy compared to one exact state-of-the-art QRD in open literature.}}, author = {{Zhang, Chenxin and Prabhu, Hemanth and Liu, Liang and Edfors, Ove and Öwall, Viktor}}, booktitle = {{[Host publication title missing]}}, keywords = {{Channel pre-processing; QR decomposition; MIMO; QR update}}, language = {{eng}}, title = {{Energy Efficient MIMO Channel Pre-processor Using a Low Complexity On-Line Update Scheme}}, url = {{https://lup.lub.lu.se/search/files/6042902/5385566.pdf}}, doi = {{10.1109/NORCHP.2012.6403103}}, year = {{2012}}, }