Title :
Performance of multi-carrier CDMA with iterative detection for a Doppler shift channel in a LEO mobile-satellite communications environment
Author :
Akhter, Mohammad S. ; Asenstorfer, John
Author_Institution :
Inst. for Telecommun. Res., Univ. of South Australia, Adelaide, SA, Australia
Abstract :
In this paper we consider a matrix algebraic approach to derive the coded multi-carrier CDMA (MC-CDMA) system model for a Doppler shift channel. We derive the effects of Doppler shift in a MC-CDMA system for low earth orbit (LEO) mobile-satellite communications and show the similarity of a MC-CDMA channel model under Doppler shift with that of the asynchronous DS-CDMA channel model. We therefore take advantage of a recently proposed technique that combines iterative decoding and interference cancellation in asynchronous DS-CDMA to reduce the multiuser interference and thereby improve the performance of the Doppler shift channel. We show that the performance approaches single user performance even for moderate signal to noise ratio
Keywords :
Doppler shift; code division multiple access; interference suppression; iterative decoding; matrix algebra; mobile satellite communication; Doppler shift channel; LEO mobile-satellite communications; MC-CDMA channel model; asynchronous DS-CDMA channel model; interference cancellation; iterative decoding; iterative detection; low earth orbit; matrix algebraic approach; multi-carrier CDMA performance; multiuser interference reduction; signal to noise ratio; Australia; Delay; Doppler shift; Interference; Iterative decoding; Low earth orbit satellites; Matrices; Mobile communication; Multiaccess communication; Multicarrier code division multiple access;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.731375
