Title :
The effect of amplitude fades on a forward transmission system using a DS CDMA
Author :
Al-Qawasmi, Abdel-Rahman ; Al-lawama, A.
Author_Institution :
Commun. & Electron. Dept., Philadelphia Univ., Amman
Abstract :
In this paper, we a study the effect of using pseudorandom sequence spread spectrum signal (Gold sequence) on the generation and detection process of a DS CDMA system with fade amplitudes. The forward transmission in the IS-95 system is assigned to individual base stations using orthogonal (Hadamard) sequences to each of them. The use of pilot-aided Rake receiver gives a conditional bit error probability that does not depend on the number of users and the effect of fade amplitudes decreases the probability of error. This phenomenon can be compensated by increasing the normalized energy per one user.
Keywords :
binary sequences; code division multiple access; error statistics; radio receivers; spread spectrum communication; DS CDMA; IS-95 system; base stations; conditional bit error probability; fade amplitudes; forward transmission system; gold sequence; orthogonal Hadamard sequence; pilot-aided Rake receiver; pseudorandom sequence spread spectrum signal; Base stations; Error probability; Fading; Gold; Multiaccess communication; Multipath channels; Random sequences; Signal generators; Signal processing; Spread spectrum communication;
Conference_Titel :
Microwaves, Radar and Remote Sensing Symposium, 2008. MRRS 2008
Conference_Location :
Kiev
Print_ISBN :
978-1-4244-2688-1
Electronic_ISBN :
978-1-4244-2689-8
DOI :
10.1109/MRRS.2008.4669601
