Energy Efficient SQRD Processor for LTE-A using a Group-sort Update Scheme
Författare
Summary, in English
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.
Avdelning/ar
Publiceringsår
2014
Språk
Engelska
Sidor
193-196
Publikation/Tidskrift/Serie
[Host publication title missing]
Fulltext
Dokumenttyp
Konferensbidrag
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Nyckelord
- QR decomposition
- Sorted QRD
- LTE-A
- MIMO
- Energy
Conference name
IEEE International Symposium on Circuits and Systems (ISCAS), 2014
Conference date
2014-06-01 - 2014-06-05
Conference place
Melbourne, Australia
Status
Published
Projekt
- High Performance Embedded Computing
- EIT_SOS VINNOVA Industrial Excellence Center - System Design on Silicon
Forskningsgrupp
- Digital ASIC
ISBN/ISSN/Övrigt
- ISSN: 0271-4310
- ISSN: 2158-1525
- ISBN: 978-1-4799-3431-7