Title :
Orthogonal multicarrier techniques applied to direct sequence spread spectrum CDMA systems
Author :
Chouly, Antoine ; Brajal, Américo ; Jourdan, Sabine
Author_Institution :
Lab. d´´Electron. Philips, Limeil-Brevannes, France
fDate :
29 Nov-2 Dec 1993
Abstract :
We design a new scheme for DS-CDMA applications. The basic principle consists in applying orthogonal multicarrier transmission to DS spread spectrum systems. Several algorithms for estimating the equalizer coefficients are investigated in order to reduce the interuser interference due to multipath propagation and cross-correlation between the code sequences. The resulting system achieves high robustness against channel impairments and outperforms the conventional single-carrier DS-CDMA system
Keywords :
code division multiple access; interference suppression; radiofrequency interference; random noise; spread spectrum communication; telecommunication channels; white noise; AWGN channels; CDMA systems; algorithms; channel impairments; code sequences; cross-correlation; direct sequence spread spectrum; equalizer coefficients; interuser interference reduction; multipath propagation; orthogonal multicarrier techniques; orthogonal multicarrier transmission; AWGN; Detectors; Downlink; Equalizers; Fading; Frequency; Interference; Multiaccess communication; Robustness; Spread spectrum communication;
Conference_Titel :
Global Telecommunications Conference, 1993, including a Communications Theory Mini-Conference. Technical Program Conference Record, IEEE in Houston. GLOBECOM '93., IEEE
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-0917-0
DOI :
10.1109/GLOCOM.1993.318364
