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

Chenxin Zhang, Hemanth Prabhu, Liang Liu, Ove Edfors, Viktor Öwall

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceedingPeer review

153 Nedladdningar (Pure)


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.
Titel på värdpublikation[Host publication title missing]
FörlagIEEE - Institute of Electrical and Electronics Engineers Inc.
Antal sidor4
ISBN (tryckt)978-1-4799-3431-7
StatusPublished - 2014
EvenemangIEEE International Symposium on Circuits and Systems (ISCAS), 2014 - Melbourne, Austrailia, Melbourne, Australien
Varaktighet: 2014 juni 12014 juni 5


ISSN (tryckt)0271-4310
ISSN (elektroniskt)2158-1525


KonferensIEEE International Symposium on Circuits and Systems (ISCAS), 2014

Ämnesklassifikation (UKÄ)

  • Elektroteknik och elektronik


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