Digital Portable Transceiver Using GMSK Modem and ADM Codec
- 1 July 1984
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal on Selected Areas in Communications
- Vol. 2 (4), 604-610
- https://doi.org/10.1109/jsac.1984.1146098
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
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