A simple constant envelope modulation scheme for orthogonal multicode CDMA system

Author

Fan, Mingxi ; Minn, Thit ; Siu, Kai Yeung

Author_Institution

MIT, Cambridge, MA, USA

Volume

2

fYear

2001

fDate

2001

Firstpage

309

Abstract

We propose a simple linear transformation technique to alleviate the signal envelope fluctuation in an orthogonal multicode CDMA system. This method is capable of converting the multilevel transmitted signals of multicode CDMA into a constant envelope signal, which then allows the use of efficient nonlinear power amplifiers. This feature leads to significant cost-reduction in the implementation of multicode CDMA systems in the uplink. The error performance and the overall complexity of this technique is shown to be very similar to that of a conventional orthogonal multicode CDMA system

Keywords

cellular radio; code division multiple access; error analysis; modulation; radio transmitters; transforms; 3G systems; complexity; constant envelope modulation scheme; error performance; linear transformation technique; multilevel transmitted signals; nonlinear power amplifiers; orthogonal multicode CDMA system; signal envelope fluctuation; third generation mobile systems; uplink; Code standards; Fluctuations; Internet; Modulation coding; Multiaccess communication; Multimedia systems; Power amplifiers; Quality of service; Throughput; Transmitters;

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.2001.983596

Filename

983596