On the frequency domain approach for spread spectrum receivers: towards a convergence of DS-CDMA, MC-CDMA and OFDM

Author

Panazio, Cristiano ; Bellanger, Maurice

Author_Institution

Conservatoire Nat. des Arts et Metiers, Paris, France

fYear

2004

fDate

11-14 July 2004

Firstpage

502

Lastpage

506

Abstract

The RAKE receiver is suboptimal when noise is non white, as in wideband CDMA systems. Frequency domain processing provides an efficient way to eliminate narrowband interference or exploit colored noise and it can significantly outperform the RAKE receiver. Additionally, other functions can be carried out directly in frequency domain, such as despreading, synchronization that is crucial for performance and equalization, which can mitigate multiuser interference. We discuss the frequency domain processing for DS-CDMA and potential gains are assessed by simulation results. An additional and important feature is that the frequency domain receiver for DS-CDMA also provides a common platform for MC-CDMA and OFDM, paving the way for an universal receiver.

Keywords

OFDM modulation; code division multiple access; equalisers; multiuser channels; radio receivers; radiofrequency interference; spread spectrum communication; DS-CDMA; MC-CDMA; OFDM; RAKE receiver; convergence; direct-sequence code-division multiple access; frequency domain approach; multicarrier system; multiuser interference; orthogonal frequency domain multiplex; potential gain; spread spectrum receiver; universal receiver; Convergence; Fading; Frequency domain analysis; Multiaccess communication; Multicarrier code division multiple access; Multipath channels; OFDM; RAKE receivers; Spread spectrum communication; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications, 2004 IEEE 5th Workshop on

Print_ISBN

0-7803-8337-0

Type

conf

DOI

10.1109/SPAWC.2004.1439294

Filename

1439294