A near optimal subchannel allocation policy in forward links for multicarrier CDMA system

Author

Fan, Pingyi ; Li, Jianjun ; Cao, Zhigang

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

Volume

2

fYear

2001

fDate

2001

Firstpage

896

Abstract

In this paper a new model of a multicarrier (MC) CDMA system is proposed with forward links transmission for a cellular network. In the proposed system, the user estimates all subchannels´ fading amplitude and feeds back all indices of its interested subchannels where the fading amplitudes are higher than a pre-fixed threshold to the basestation to guarantee the quality of service. With the indices information, the basestation transmits each user´s direct-sequence (DS) waveform over one of its interested subchannels. Based on the criterion of maximizing the total average signal to interference plus noise ratio (SINR), a near optimal subchannel allocation policy is proposed and one iterative algorithm for its implementation is obtained. Simulation results show that the average performance in the proposed system can be improved compared with that only using the favorite subchannel for each user in Kim et al. (1999) when random signature sequences are used

Keywords

cellular radio; channel allocation; code division multiple access; iterative methods; quality of service; SINR; amplitude; basestation; cellular network; direct sequence waveform; forward links; interested subchannels; iterative algorithm; multicarrier CDMA system; near optimal subchannel allocation policy; quality of service; Bandwidth; Fading; Frequency; Interference; Iterative algorithms; Multiaccess communication; Multicarrier code division multiple access; Quality of service; Rayleigh channels; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd

Conference_Location

Rhodes

ISSN

1090-3038

Print_ISBN

0-7803-6728-6

Type

conf

DOI

10.1109/VETECS.2001.944508

Filename

944508