Frequency domain estimation of multiple access OFDM channels

Tareq Y. Al-Naffouri, Ashfaq Ahmed Mukaddam

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

2 Scopus citations

Abstract

OFDM modulation combines the advantages of high achievable rates and relatively easy implementation. However, for proper recovery of the input, the OFDM receiver needs accurate channel information. Most algorithms proposed in literature perform channel estimation in the time domain which increases the computational complexity in multiaccess situations where the user is only interested in part of the spectrum. In this paper, we propose a frequency domain algorithm for channel estimation in OFDM. The algorithm performs eigenvalue decomposition of the channel autocorrelation matrix and approximates the channel frequency response seen by each user by the first few dominant eigenvectors. This reduces the parameter estimation space and allows estimation using a few number of pilots1.

Original languageEnglish (US)
Title of host publicationICSPC 2007 Proceedings - 2007 IEEE International Conference on Signal Processing and Communications
Pages1047-1050
Number of pages4
DOIs
StatePublished - 2007
Externally publishedYes
Event2007 IEEE International Conference on Signal Processing and Communications, ICSPC 2007 - Dubai, United Arab Emirates
Duration: Nov 14 2007Nov 27 2007

Other

Other2007 IEEE International Conference on Signal Processing and Communications, ICSPC 2007
CountryUnited Arab Emirates
CityDubai
Period11/14/0711/27/07

Keywords

  • Channel estimation
  • Frequency domain estimation
  • OFDM
  • Parameter reduction

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Communication

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