Performance of wideband CDMA using adaptive space-time spreading over multipath Nakagami fading channels

Author

Yang, Lie-Liang ; Hanzo, Lajos

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

Volume

2

fYear

2002

fDate

6/24/1905 12:00:00 AM

Firstpage

615

Abstract

An adaptive space-time spreading (ASTS) assisted transmit diversity scheme is proposed for improving the throughput of wideband code-division multiple-access (W-CDMA) systems. The performance of the system is investigated, when frequency-selective Nakagami-m fading channels, multiuser interference and background noise are considered. Our numerical results demonstrate that the proposed ASTS-based transmission scheme is capable of significantly improving the effective throughput of W-CDMA systems. Specifically, the studied W-CDMA system´s bitrate can be increased by a factor of three at the modest cost of requiring an extra 0.4 dB or 1.2 dB transmitted power in the context of the investigated urban or suburban areas, respectively.

Keywords

adaptive systems; broadband networks; cellular radio; code division multiple access; diversity reception; fading channels; multipath channels; multiuser channels; noise; radiofrequency interference; spread spectrum communication; time-varying channels; 3rd-generation W-CDMA systems; W-CDMA systems; adaptive space-time spreading; background noise; frequency-selective Nakagami-m fading channels; multipath Nakagami fading channels; multiuser interference; suburban areas; system performance; throughput; time-varying channels; transmit diversity; urban areas; wideband CDMA; wideband code-division multiple-access; Background noise; Bit rate; Costs; Fading; Frequency; Multiaccess communication; Receiving antennas; Sociotechnical systems; Throughput; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th

Print_ISBN

0-7803-7484-3

Type

conf

DOI

10.1109/VTC.2002.1002558

Filename

1002558