Use of antenna array diversity in multiuser detection of QS-CDMA systems

Author

Kim, Kwang Soon ; Lee, Min Joon ; Kim, Yun Hee ; Kim, Sun Yong ; Song, Iickho

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

fYear

1997

fDate

9-12 Sep 1997

Firstpage

835

Abstract

Multiuser detection has been an interesting topic because of its capability of eliminating multiuser interference and resistance to the near-far problem. The decorrelator approach has been investigated as a suboptimum multiuser detector for low complexity in a receiver at the expense of the enhancement and correlation of noise. In this paper, we consider a quasi maximum likelihood (quasi-ML) detector in the reverse link system which uses antenna arrays in quasi-synchronous channels. It is shown that the performance of the system is better than that of the conventional decorrelator and that the performance gain over the conventional decorrelator system increases as the number of active users and number of antenna arrays increase

Keywords

antenna arrays; code division multiple access; diversity reception; land mobile radio; maximum likelihood detection; radio receivers; receiving antennas; synchronisation; QS-CDMA systems; active user numbers; antenna array diversity; decorrelator approach; multiuser detection; multiuser interference; near-far problem; performance; quasi maximum likelihood detector; quasi-synchronous channels; receiver; reverse link system; Antenna arrays; Base stations; Decorrelation; Delay; Detectors; Interference elimination; Mobile antennas; Multiaccess communication; Multiuser detection; Sensor arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on

Print_ISBN

0-7803-3676-3

Type

conf

DOI

10.1109/ICICS.1997.652096

Filename

652096