Title :
Sequences selection for quasi-synchronous CDMA systems
Author :
Jeszensky, Paul Jean Etienne ; Junior, John Richard Fitzgerald
Author_Institution :
Escola Politecnica, Sao Paulo Univ., Brazil
Abstract :
After a review of asynchronous code division multiple access (A-CDMA) systems, quasi-synchronous CDMA (QS-CDMA) systems are introduced and its performance is determined based on the calculation of the bit error rate (BER). The two systems are compared with numerical examples and the superior performance of the latter is established. The results calculated for Gold sequences with N=511 and K=48 subscribers are presented and confirm the superior performance of the QS system as expected. This advantage is ≈10 dB for Pe=10-7
Keywords :
code division multiple access; error statistics; sequences; A-CDMA; BER performance; Gold sequences; QS-CDMA systems; asynchronous code division multiple access; bit error rate; quasi-synchronous CDMA systems; sequences selection; AWGN; Additive white noise; Bit error rate; Code division multiplexing; Delay; Gaussian approximation; Gold; Multiaccess communication; Signal to noise ratio; Statistical analysis;
Conference_Titel :
Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on
Conference_Location :
Sun City
Print_ISBN :
0-7803-4281-X
DOI :
10.1109/ISSSTA.1998.722468
