DocumentCode
1057465
Title
Digital Portable Transceiver Using GMSK Modem and ADM Codec
Author
Suzuki, Hiroshi ; Momma, Koji ; Yamao, Yasushi
Author_Institution
Radio Commun. Lab., NTT Public Corp, Kanagawa, Japan
Volume
2
Issue
4
fYear
1984
fDate
7/1/1984 12:00:00 AM
Firstpage
604
Lastpage
610
Abstract
Digital mobile radio transmission techniques and integrated circuit devices have been developed for application to a digital portable transceiver utilizing narrow-band GMSK modulation and ADM voice coding. Design and performance of a quadrature type GMSK modulator and a single-chip coherent demodulator as the GMSK modem are described. To overcome slow fading, encountered in portable applications, switching diversity using a jitter detection type sensor is Proposed and shown to be effective. An experimental Portable transceiver, developed to demonstrate hardware feasibility, is also described.
Keywords
Delta modulation; Land mobile radio transmitters/receivers; Minimum-shift keying; Application specific integrated circuits; Codecs; Demodulation; Digital integrated circuits; Digital modulation; Land mobile radio; Modems; Modulation coding; Narrowband; Transceivers;
fLanguage
English
Journal_Title
Selected Areas in Communications, IEEE Journal on
Publisher
ieee
ISSN
0733-8716
Type
jour
DOI
10.1109/JSAC.1984.1146098
Filename
1146098
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