Parameter estimation and equalization techniques for MIMO frequency selective channels with multiple frequency offsets

Sajid Ahmed, Sangarapillai Lambotharan, Andreas Jakobsson, Jonathon Chambers

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

Abstract

In this work, we focus upon the estimation of the channel parameters of a multiple input and multiple output (MIMO) model, allowing for more than one path between the transmit and the receive antennas, with each path possibly having different frequency offsets (FOs). Such a scenario may arise due to Doppler shifts associated with various multipaths. In particular, we derive an approximate maximum likelihood estimator (AML) for the channel parameters by exploiting the correlation property of the pilot signal. The resulting AML is realised as the sum of n T L one-dimensional maximizations, where n T is the number of transmit antennas and L is the total number of paths, and is validated by comparison with the Cramér-Rao lower bound (CRLB), which is also derived. Furthermore, a minimum mean square error recursive (MMSER) equalizer is proposed which exploits the estimated parameters, the performance of which is shown to be much improved on an equalizer not accounting for FOs.

Original languageEnglish (US)
Title of host publication2004 12th European Signal Processing Conference, EUSIPCO 2004
PublisherEuropean Signal Processing Conference, EUSIPCO
Pages1857-1860
Number of pages4
ISBN (Electronic)9783200001657
StatePublished - Apr 3 2015
Event12th European Signal Processing Conference, EUSIPCO 2004 - Vienna, Austria
Duration: Sep 6 2004Sep 10 2004

Publication series

NameEuropean Signal Processing Conference
Volume06-10-September-2004
ISSN (Print)2219-5491

Other

Other12th European Signal Processing Conference, EUSIPCO 2004
CountryAustria
CityVienna
Period09/6/0409/10/04

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

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