Low complexity multipath diversity through fractional sampling in OFDM

Cihan Tepedelenlioglu, R. Challagulla

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) enables low-complexity equalization and has been adopted in several wireless standards. However, OFDM cannot exploit multipath diversity without computationally complex coding and decoding. We show here that fractional sampling (FS) can improve the capacity and the diversity that an OFDM system can provide. We calculate the outage capacity of an FS-OFDM system to quantify the possible gains that FS offers. We also propose a low-complexity maximal ratio combining approach at each subcarrier for the FS-OFDM system, and argue that the diversity gains acquired through this approach are related to the frequency content of the transmit filter. We corroborate our approach with simulations.

Original languageEnglish (US)
Title of host publicationConference Record of the Asilomar Conference on Signals, Systems and Computers
EditorsM.B. Matthews
Pages1813-1817
Number of pages5
Volume2
StatePublished - 2002
EventThe Thirty-Sixth Asilomar Conference on Signals Systems and Computers - Pacific Groove, CA, United States
Duration: Nov 3 2002Nov 6 2002

Other

OtherThe Thirty-Sixth Asilomar Conference on Signals Systems and Computers
CountryUnited States
CityPacific Groove, CA
Period11/3/0211/6/02

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Signal Processing
  • Hardware and Architecture

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  • Cite this

    Tepedelenlioglu, C., & Challagulla, R. (2002). Low complexity multipath diversity through fractional sampling in OFDM. In M. B. Matthews (Ed.), Conference Record of the Asilomar Conference on Signals, Systems and Computers (Vol. 2, pp. 1813-1817)