Capacity comparison of single-tone and multitone CDMA systems

Author

Zhang, Xi ; Ng, Tung-Sang ; Wang, Jiangzhou

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong

Volume

1

fYear

1999

fDate

1999

Firstpage

243

Abstract

Performance of multitone-CDMA communications over multipath fading channels with coherent RAKE reception is studied. A random-delay, two-path, Rayleigh-fading channel model is considered. Bit error probability for maximal ratio combining is derived. Analytical results show that the multiple-access capacity of a multitone-CDMA system, under conditions of equal bandwidth and equal bit transmission rate, is identical to that of a single-tone direct-sequence spread-spectrum system. It indicates that using more subcarriers to increase the processing gain does not achieve a larger capacity

Keywords

Rayleigh channels; code division multiple access; diversity reception; error statistics; land mobile radio; multipath channels; bit error probability; capacity comparison; coherent RAKE reception; maximal ratio combining; multipath fading channels; multiple-access capacity; multitone CDMA systems; processing gain; random-delay two-path Rayleigh-fading channel model; single-tone CDMA systems; subcarriers; AWGN channels; Bandwidth; Diversity reception; Error probability; Fading; Multiaccess communication; Multiple access interference; Radio transmitters; Rayleigh channels; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.797132

Filename

797132