Differential M-ary orthogonal signaling for DS/CDMA land mobile satellite communications

Author

Iossifides, Athanassios C. ; Pavlidou, Fotini-Niovi

Author_Institution

Dept. of Electr. & Comput. Eng., Aristotelian Univ. of Thessaloniki, Greece

Volume

17

Issue

2

fYear

1999

fDate

2/1/1999 12:00:00 AM

Firstpage

214

Lastpage

222

Abstract

In this paper, we derive an analytical framework for the performance evaluation of an M-ary orthogonal scheme based on differential encoding/decoding of the Walsh/Hadamard chips prior/after spreading. This technique makes feasible nonpilot-assisted detection over fast fading environments such as the land mobile satellite (LMS) channel. Our results show that differential M-ary orthogonal signaling presents very good performance at Doppler frequency shifts much higher than the symbol rate. Amplitude statistics are considered to be Rayleigh, but may be easily extended to more general models based on the analytical derivation presented

Keywords

Doppler shift; Rayleigh channels; Walsh functions; code division multiple access; decoding; encoding; land mobile radio; mobile satellite communication; spread spectrum communication; telecommunication signalling; DS/CDMA land mobile satellite communications; Doppler frequency shifts; Hadamard chips; LMS channel; Rayleigh statistics; Walsh chips; amplitude statistics; differential M-ary orthogonal signaling; differential decoding; fast fading environments; land mobile satellite channel; nonpilot-assisted detection; performance; Decoding; Doppler shift; Frequency; Least squares approximation; Multiaccess communication; Performance analysis; Power system modeling; Rayleigh channels; Satellite communication; Statistical analysis;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.748786

Filename

748786