A dual-tone reference digital demodulator for mobile digital communication

Author

Fitz, Michael P.

Author_Institution

Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA

Volume

42

Issue

2

fYear

1993

fDate

5/1/1993 12:00:00 AM

Firstpage

156

Lastpage

165

Abstract

A demodulator applicable to the dual-pilot tone modulation technique is presented. Examination of orthogonal and ISI (intersymbol interference) free pulse shapes leads to the novel demodulator structure. This demodulator is advantageous because the processing is strictly linear, the pilot channel and data channel ideally do not interfere or create self-noise, no differential encoding is required since no phase ambiguity is created with the pilot tone processing, and near ideal bit error probability performance is achieved. This demodulator offers an alternative to the transmitted tone-in-band and the pilot symbol assisted modulation techniques. The author considers π/4-QPSK modulation with 33% excess bandwidth in the isotropic time-varying fading channel as a design example

Keywords

demodulators; digital radio systems; error statistics; intersymbol interference; mobile radio systems; phase shift keying; π/4-QPSK modulation; ISI pulse shapes; bit error probability; data channel; dual-tone reference digital demodulator; intersymbol interference; isotropic time-varying fading channel; mobile digital communication; orthogonal pulse shapes; pilot channel; Binary phase shift keying; Decoding; Demodulation; Digital communication; Error probability; Fading; Phase locked loops; Pulse modulation; Pulse shaping methods; Quadrature phase shift keying;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.211453

Filename

211453