Title :
Performance of multirate transmission schemes for a multicarrier DS/CDMA system
Author :
Lim, Kang Soo ; Lee, Jae Hong
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
6/23/1905 12:00:00 AM
Abstract :
In this paper, two multirate transmission schemes are considered for an asynchronous multicarrier (MC) DS/CDMA system: multicode scheme and multiple processing gain (MPG) scheme. A successive interference canceller (SIC) is applied to the two multirate MC-DS/CDMA systems to cancel multiple access interference (MAI). The bit error rate (BER) of each system is obtained by analysis and simulation in a Rayleigh fading channel with perfect channel estimation. It is shown that higher rate users have smaller BER than lower rate users in both systems. It is shown that the system with the multicode scheme has better performance than the system with the MPG scheme for high processing gain. Also, it is shown that the former has even better performance than the latter when SIC is applied
Keywords :
Rayleigh channels; code division multiple access; error statistics; interference suppression; radiofrequency interference; spread spectrum communication; synchronisation; BER; MAI; MC-DS/CDMA systems; MPG scheme; Rayleigh fading channel; SIC; asynchronous multicarrier DS/CDMA system; bit error rate; multicode scheme; multiple access interference; multiple processing gain scheme; multirate transmission schemes; perfect channel estimation; successive interference canceller; Analytical models; Bandwidth; Bit error rate; Fading; Frequency; Interference cancellation; Multiaccess communication; Multiple access interference; Performance gain; Silicon carbide;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956874
