Title :
Performance Analysis of Oversaturated Group Orthogonal CDMA System in Multipath Channel
Author :
Paavola, Jarkko ; Ipatov, Valery
Author_Institution :
Turku Centre for Comput. Sci., Turku Univ.
Abstract :
The method of increasing capacity of synchronous CDMA, called group orthogonal CDMA, is analyzed. When the number of users exceeds the signal space dimension the system becomes oversaturated. Previously designed oversaturated CDMA signatures are compared to conventional orthogonal signaling in multipath channel by computer simulations. Countermeasure to combat fading is to utilize zero forcing equalizer in the receiver. Results show that the energy loss due to larger number of active interferers in oversaturated system is for fading channels of the same order as for non-fading AWGN channel
Keywords :
AWGN channels; code division multiple access; equalisers; matrix algebra; multipath channels; telecommunication signalling; multipath channel; nonfading AWGN channel; orthogonal signaling; oversaturated group orthogonal CDMA system; signal space dimension; zero forcing equalizer; AWGN channels; Code division multiplexing; Computer simulation; Energy loss; Equalizers; Fading; Multiaccess communication; Multipath channels; Performance analysis; Signal design; AWGN; CDMA; multipath channel; oversaturation; signature design; simulation;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.254293
