Implementation of a Novel Architecture for DFT-based Channel Estimators in OFDM Systems

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

A new architecture for Discrete Fourier Transform (DFT) based channel estimation has been analyzed, implemented and synthesized for ASIC. The core concept of the proposed esti- mation algorithm is to process the channel increments rather than the channel coefficients. With strong enough time correlation, we can reduce the wordlength of processing blocks compared to standard channel estimators and hence the resulting area and power. We provide an analytical tool to predict the potential gains in bit reduction for different mobility scenarios. Our simulations show that the wordlength can be reduced from 9 to 3 bits when operating in low mobility scenarios, with 5Hz Doppler frequency, while maintaining acceptable performance. Synthesis results show up to 40% reduction in area, compared to the original DFT-based approach, in a 65nm CMOS process.

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Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering
Original languageEnglish
Title of host publication[Host publication title missing]
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Publication statusPublished - 2014
Publication categoryResearch
Peer-reviewedYes
EventSIPS 2014 - Belfast
Duration: 2014 Oct 20 → …

Conference

ConferenceSIPS 2014
Period2014/10/20 → …

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