Subspace based blind detector for multi-carrier CDMA with virtual carriers over dispersive channels

Author

Li, Chengyang ; Roy, Sumit

Author_Institution

Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA

Volume

1

fYear

2000

fDate

Oct. 29 2000-Nov. 1 2000

Firstpage

813

Abstract

Blind MMSE detection for multi-carrier CDMA (MC-CDMA) systems in the presence of intersymbol interference (ISI) channels is addressed. By exploiting the presence of virtual carriers, a blind detector architecture (subspace based) channel estimator followed by a linear MMSE equalizer-is proposed that achieves high spectral efficiency due to elimination of cyclic prefix while not requiring any training for start-up. Both full and reduced dimension subspace detection is investigated, to highlight possible performance-complexity trade-offs suitable for uplink and downlink applications, respectively.

Keywords

OFDM modulation; code division multiple access; computational complexity; dispersive channels; equalisers; intersymbol interference; land mobile radio; least mean squares methods; multiuser channels; parameter estimation; radio links; signal detection; ISI channels; MC-CDMA systems; OFDM; baseband signal model; blind MMSE detection; blind detector architecture; channel estimator; cyclic prefix elimination; dispersive channels; downlink applications; full dimension subspace detection; high spectral efficiency; intersymbol interference channels; linear MMSE equalizer; mobile communications systems; multicarrier CDMA; orthogonal frequency division multiplexing; performance-complexity trade-offs; reduced dimension subspace detection; subspace based blind detector; uplink applications; virtual carriers; Baseband; Channel estimation; Detectors; Dispersion; Downlink; Equalizers; Frequency division multiplexing; Multiaccess communication; Multicarrier code division multiple access; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-6514-3

Type

conf

DOI

10.1109/ACSSC.2000.911064

Filename

911064