Multiuser channel estimation for detection of cochannel signals

Author

Grant, Stephen J. ; Cavers, James K.

Author_Institution

Simon Fraser Univ., Burnaby, BC, Canada

Volume

49

Issue

10

fYear

2001

fDate

10/1/2001 12:00:00 AM

Firstpage

1845

Lastpage

1855

Abstract

Estimation of the channel impulse responses of multiple cochannel users is a key requirement of all multiuser detection and interference cancellation techniques, though little attention has been paid to the subject in the context of time-division multiple-access (TDMA) systems. This paper addresses a pilot-based MMSE technique for multiuser channel estimation in a TDMA system, and makes two key contributions. Firstly, it allows for time variation of the channels within and between training sequences, an essential feature in a multiuser environment even at moderate fading rates. Secondly, it addresses the design of training sequences for the multiple cochannel users

Keywords

cochannel interference; fading channels; interference suppression; least mean squares methods; multiuser channels; signal detection; time division multiple access; time-varying channels; TDMA system; channel impulse response; cochannel signals; interference cancellation; moderate fading rates; multiple cochannel users; multiuser channel estimation; multiuser detection; pilot-based MMSE technique; signal detection; time varying channels; time-division multiple-access; training sequences design; Associate members; Fading; Interference cancellation; Interference suppression; Multiaccess communication; Multidimensional systems; Multiuser channels; Multiuser detection; Signal detection; Time division multiple access;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.957406

Filename

957406