Title :
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
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;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2004 IEEE 5th Workshop on
Print_ISBN :
0-7803-8337-0
DOI :
10.1109/SPAWC.2004.1439294
