Power-efficient continuous-flow memory-based FFT processor for WiMax OFDM mode

Pei Yun Tsai, Tsung Hsueh Lee, Tzi Dar Chiueh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

This paper presents a fast Fourier transform (FFT) processor suitable for IEEE 802.16e (WiMax) OFDM mode. FFT/IFFT processors are very crucial in OFDM transceivers and they usually consume considerable power as well as occupy large area. The proposed FFT processor combines the pipelined architecture and the memory-based architecture so that it can operate at the sample rate and thus achieve power efficiency. The processor is based on the multipath delay commutator architecture with high-radix arithmetic units and two main memories for input buffering, intermediate storage, and output reordering. A proposed conflict-free memory addressing strategy makes possible continuous-flow FFT processing. Simulation results show that it achieves a 29% saving in power consumption.

Original languageEnglish
Title of host publication2006 International Symposium on Intelligent Signal Processing and Communications, ISPACS'06
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages622-625
Number of pages4
ISBN (Print)0780397339, 9780780397330
DOIs
StatePublished - 2006
Event2006 International Symposium on Intelligent Signal Processing and Communications, ISPACS'06 - Yonago, Japan
Duration: 12 Dec 200615 Dec 2006

Publication series

Name2006 International Symposium on Intelligent Signal Processing and Communications, ISPACS'06

Conference

Conference2006 International Symposium on Intelligent Signal Processing and Communications, ISPACS'06
Country/TerritoryJapan
CityYonago
Period12/12/0615/12/06

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