Performance Analysis for MC-CDMA System in Impulsive Noise

Author

Fa, Rui ; Sharif, Bayan S. ; Tsimenidis, Charalampos C.

Author_Institution

Dept. of Electron., Univ. of York, York

fYear

2009

fDate

5-8 April 2009

Firstpage

1

Lastpage

5

Abstract

In this paper, we consider the effect of impulsive noise on the performance of multicarrier code division multiple access (MC-CDMA) systems and analyze the performance by examining the MC-CDMA system model in time domain. We have discovered that conventional Walsh-code based MC-CDMA is less robust to the presence of impulsive noise than the corresponding direct sequence (DS) CDMA and multicarrier modulation based (MCM) systems. Furthermore, it is demonstrated that the performance of MC-CDMA depends strongly on the selection of the utilized spreading codes. A modified MC-CDMA structure, called MC-SI-CDMA, is proposed and investigated in impulsive noise that employs subcarrier interleaving (SI) to reduce the cross- correlation between the time-domain MC-CDMA waveforms and the impulsive noise. Computer simulation results conducted to support our analysis indicate that the proposed MC-SI- CDMA system in impulsive noise can provide a performance improvement of 2.5 dB at a bit error rate (BER) level of 10^-3 compared with the DS-CDMA system.

Keywords

code division multiple access; correlation methods; error statistics; impulse noise; modulation; spread spectrum communication; time-domain analysis; waveform analysis; DS-CDMA system; MC-CDMA system; MCM system; Walsh-code based-MC-CDMA; bit error rate; cross-correlation; direct sequence CDMA; impulsive noise; multicarrier code division multiple access; multicarrier modulation; subcarrier interleaving; time-domain MC-CDMA waveform; Bit error rate; Computer simulation; Interleaved codes; Multiaccess communication; Multicarrier code division multiple access; Noise level; Noise reduction; Noise robustness; Performance analysis; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE

Conference_Location

Budapest

ISSN

1525-3511

Print_ISBN

978-1-4244-2947-9

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2009.4917885

Filename

4917885