New adaptive bit loading algorithms for uplink multiuser OFDM/CDMA systems

Author

Zhang, Hua ; Bi, Guoan ; Yu, Qian ; Hu, Gang

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

7

fYear

2004

fDate

20-24 June 2004

Firstpage

4128

Abstract

With the known knowledge of the instantaneous channel gains in the uplink of multiuser OFDM/CDMA systems, adaptive bit loading algorithms are proposed to minimize the interference from an individual user. The performance of the proposed algorithm is studied in a multiuser frequency selective fading environment in terms of bit error rate, system capacity and capability of supporting high data rates. The results show that the proposed algorithm outperforms the previously reported algorithms.

Keywords

OFDM modulation; code division multiple access; error statistics; fading channels; mobile radio; multiuser channels; radio links; radiofrequency interference; CDMA system; adaptive bit loading algorithms; bit error rate; code division multiple access; instantaneous channel gain; interference; multiuser frequency selective fading environment; orthogonal frequency division multiplexing; system capacity; uplink multiuser OFDM; Bismuth; Bit error rate; Bit rate; Fading; Intersymbol interference; Multiaccess communication; Multicarrier code division multiple access; OFDM; Throughput; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2004 IEEE International Conference on

Print_ISBN

0-7803-8533-0

Type

conf

DOI

10.1109/ICC.2004.1313325

Filename

1313325