Title :
Performance analysis of constant envelope quadriphase sequences for CDMA
Author :
Jamil, Momin ; Krzymien, Witold A. ; Van Wyk, D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada
Abstract :
This paper describes the comparison between constant envelope root-of-unity (CE-RU) and Nyquist filtered quadriphase sequences for code division multiple access (CDMA) applications. The salient feature of CE-RU filtering is the constant envelope property of the filtered sequences. The preservation of constant envelope of the sequences is desirable in fading environments. It is shown that the correlation properties of CE-RU filtered 4-phase sequences are better than those of Nyquist filtered 4-phase sequences. Preliminary results on bit error rate (BER) performance of CE-RU versus the Nyquist filtered 4-phase sequences on the additive white Gaussian noise (AWGN) channel are also presented
Keywords :
AWGN channels; binary sequences; code division multiple access; correlation methods; error statistics; filtering theory; land mobile radio; multiuser channels; spread spectrum communication; AWGN channel; BER performance; CDMA; CE-RU filtered 4-phase sequences; CE-RU filtering; DS-SS; Nyquist filtered 4-phase sequences; Nyquist filtered quadriphase sequences; additive white Gaussian noise channel; binary sequences; bit error rate; code division multiple access; constant envelope quadriphase sequences; constant envelope root-of-unity sequences; correlation properties; direct sequences spread spectrum receiver; fading environments; mobile radio; multi-user interference; performance analysis; AWGN; Bandwidth; Binary sequences; Bit error rate; Canada Councils; Filtering; Filters; Multiaccess communication; Performance analysis; Phase shift keying;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.878114
