Optimum TPC command sequence in WCDMA

Author

Chaoyang, Chen ; Baoling, Liu ; Qingyi, Quan ; Ping, Zhang

Author_Institution

Beijing Univ. of Posts & Telecommun., China

Volume

2

fYear

2001

fDate

2001

Firstpage

134

Abstract

In a WCDMA system, the single-bit adaptive step-size closed-loop power control scheme is popularly investigated. But the only information which the transmitter can apply to adjust the transmit power is the received TPC command sequence. On the other hand, we need a reference TPC command sequence (we call it the optimum TPC command sequence), if the transmitter receives such a TPC command, the SIR at the receiver meets the quality of service demand. To compare the optimum TPC command sequence with the transmitter received TPC command sequence, we can choose the step-size according to the amount of the difference between them. In this paper, we investigate the characters of the optimum TPC command sequence under some typical radio channel by computer simulation; it is found that the 0 and 1 alternative sequence is an optimum TPC command sequence

Keywords

Rayleigh channels; adaptive control; broadband networks; closed loop systems; code division multiple access; mobile radio; power control; quality of service; radio transmitters; sequences; telecommunication control; W-CDMA; WCDMA; adaptive step-size closed-loop power control; optimum TPC command sequence; quality of service demand; radio channel; receiver; step-size; transmit power; transmitter; Adaptive control; Adaptive filters; Interference; Multiaccess communication; Power control; Programmable control; Quality of service; Radio transmitters; Signal processing; Stochastic processes;

fLanguage

English

Publisher

ieee

Conference_Titel

Info-tech and Info-net, 2001. Proceedings. ICII 2001 - Beijing. 2001 International Conferences on

Conference_Location

Beijing

Print_ISBN

0-7803-7010-4

Type

conf

DOI

10.1109/ICII.2001.983566

Filename

983566