Code phase assignment DS/CDMA communications for indoor wireless Rician multipath fading channels

Author

Yat-Hong, J. ; Yip, Kun-wah ; Ng, Tung-Sang

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong

Volume

2

fYear

1996

fDate

5-7 May 1996

Firstpage

1106

Abstract

The technique of using a single basic signature sequence for the DS/CDMA system was investigated. All users have their sequences differing by cyclic phase shifts from a basic signature sequence. The technique is called code phase assignment (CPA). Yip and Ng (see IEEE/VTS 44th Vehicular Technology Conference, vol.3, p.1586, 1994), have shown that the CPA DS/CDMA technique yielded better performance over conventional DS/CDMA communications by a substantial reduction of the multiple access interference (MAI) and the multipath interference (MI) for a simplified channel model. This paper further investigates its performance in the indoor Rician multipath fading channel. A comparison with a conventional DS/CDMA system is made and the effect on the change of the system parameters is investigated. A higher multiple access capacity over a conventional DS/CDMA is demonstrated. CPA could reduce the effort of exhaustive search for sequences which makes it suitable for indoor applications

Keywords

Rician channels; code division multiple access; cyclic codes; fading; indoor radio; interference suppression; land mobile radio; multipath channels; pseudonoise codes; radiofrequency interference; spread spectrum communication; DS/CDMA communications; DS/CDMA system; Rician multipath fading channels; channel model; code phase assignment; cyclic codes; cyclic phase shifts; indoor wireless; multipath interference; multiple access capacity; multiple access interference; performance; signature sequence; system parameters; Autocorrelation; Degradation; Fading; Gold; Indoor environments; Indoor radio communication; Multiaccess communication; Multiple access interference; Rician channels; Vehicular and wireless technologies; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Technology Proceedings, 1996. ICCT'96., 1996 International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-2916-3

Type

conf

DOI

10.1109/ICCT.1996.545077

Filename

545077