Interference suppression for MC-CDMA by frequency domain oversampling

Author

Hombs, Brandon ; Lehnert, James S.

Author_Institution

Purdue Univ., West Lafayette, IN, USA

Volume

1

fYear

2004

fDate

7-10 Nov. 2004

Firstpage

707

Abstract

A technique for interference suppression in multicarrier code-division multiple-access (MC-CDMA) systems is proposed which exploits the structural differences in signals that arrive at the receiver with Doppler shifts or carrier offsets. Oversampling the received signal in the frequency domain and properly combining the samples provides the interference suppression. The combining scheme increases the signal-to-interference ratio (SIR) experienced by the desired user in the MC-CDMA system. Numerical results show that the proposed receiver significantly outperforms the conventional MC-CDMA receiver in many situations.

Keywords

Doppler shift; code division multiple access; interference suppression; least mean squares methods; radio receivers; signal sampling; Doppler shift; MC-CDMA; frequency domain; interference suppression; multicarrier code-division multiple-access system; receiver; signal oversampling; Convergence; Doppler shift; Frequency domain analysis; Interference suppression; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; Multiuser detection; OFDM; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on

Print_ISBN

0-7803-8622-1

Type

conf

DOI

10.1109/ACSSC.2004.1399226

Filename

1399226