Publication

Sie verwenden einen Browser, in dem JavaScript deaktiviert ist. Dadurch wird verhindert, dass Sie die volle Funktionalität dieser Webseite nutzen können. Zur Navigation müssen Sie daher die Sitemap nutzen.

You are currently using a browser with deactivated JavaScript. There you can't use all the features of this website. In order to navigate the site, please use the Sitemap .

Energy-efficiency of floating-point and fixed-point SIMD cores for MIMO processing systems

Authors:
Guenther, D. ,  Bytyn, A.Leupers, R.Ascheid, G.
Book Title:
Proceedings of the International Symposium on System-on-Chip (SoC)
Publisher:
IEEE
Pages:
p.p. 1-7
Address:
Tampere
Date:
Oct. 2014
DOI:
10.1109/ISSOC.2014.6972429
Language:
English

Abstract

For computational tasks with regular data access patterns, e.g. vector arithmetic, single instruction multiple data (SIMD) processor cores present a viable alternative to application-specific integrated circuits (ASICs). Even though the additional flexibility of a programmable core comes at the expense of reduced area- and energy efficiency, this price is potentially worth paying in application domains with a multitude of standards and use cases as it is the case in the domain of wireless communications. The high dynamic range of values that occurs in multi-antenna wireless baseband processing calls for the use of numerical stabilization measures like QR factorization and scaling when operating on a fixed-point processor core. A floating-point core on the other hand covers a wider dynamic range, rendering such measures unnecessary at the price of increased power consumption. This work compares a floating-point and a fixed-point SIMD core in a case study of linear MIMO detection. After evaluating the numerical precision requirements, the achievable throughput of both cores is compared along with the maximum achievable area- and energy efficiency for several use cases, resulting in an assessment as to which number format is best suited for which use case.

Download

BibTeX

Copyright © by IEEE
guenther14.pdf
© 2021 IEEE.Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.