Title :
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
fDate :
6/24/1905 12:00:00 AM
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;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002558
