Title :
Improving bandwidth efficiency for a residue number system based DS-CDMA system
Author :
Madhukumar, A.S. ; Chin, Francois
Author_Institution :
Centre for Wireless Commun., Singapore, Singapore
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper presents a new method to improve bandwidth efficiency of RNS based CDMA system by combining RNS representation, PSK/QAM modulation and orthogonal modulation. Using the proposed method significantly reduces the computational complexity of the receiver unit and significantly increases the data transmission rate. The modified system is simulated extensively for different channel conditions and found that it can be used for faster data transmission without affecting the system performance.
Keywords :
code division multiple access; computational complexity; data communication; digital simulation; multiuser channels; phase shift keying; quadrature amplitude modulation; radio receivers; radio transmitters; residue number systems; spread spectrum communication; BER performance; PSK/QAM; RNS based DS-CDMA system; bandwidth efficiency; channel conditions; data transmission rate; orthogonal modulation; parallel residue channels; receiver computational complexity reduction; residue number system; simulation; system performance; transmitter; Bandwidth; Bit rate; Computational complexity; Computational modeling; Data communication; Dynamic range; Multiaccess communication; System performance; Transmitters; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956595
