Comparison of attractive modulation schemes for the uplink in DS-CDMA systems

Author

Schramm, Peter

Author_Institution

Ericsson Eurolab Deutschland GmbH, Nurnberg, Germany

Volume

2

fYear

1997

fDate

4-7 May 1997

Firstpage

1228

Abstract

Several modulation schemes combined with convolutional coding which are attractive for the uplink in DS-CDMA systems are compared based on the criterion of maximum power efficiency. It is shown for typical system assumptions that 2PSK either with pilot channel or with pilot symbols time-multiplexed with data symbols, and 64-ary orthogonal modulation combined with coherent demodulation lead to the highest power efficiency. If the receiver complexity is taken into account, the conclusion is that 2PSK is the most suitable modulation scheme for the uplink in typical DS-CDMA systems

Keywords

code division multiple access; convolutional codes; demodulation; land mobile radio; modulation coding; phase shift keying; pseudonoise codes; radio links; radio receivers; spread spectrum communication; telecommunication channels; 2PSK; 64-ary orthogonal modulation; DS-CDMA systems; coherent demodulation; convolutional coding; data symbols; maximum power efficiency; mobile radio communications; modulation; performance; pilot channel; pilot symbols; receiver complexity; time-multiplexing; uplink; Channel estimation; Context; Convolutional codes; Demodulation; Downlink; Land mobile radio; Modulation coding; Multiaccess communication; Multiuser detection; Research and development;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1997, IEEE 47th

Conference_Location

Phoenix, AZ

ISSN

1090-3038

Print_ISBN

0-7803-3659-3

Type

conf

DOI

10.1109/VETEC.1997.600527

Filename

600527