Title :
Modems for US digital cellular and emerging digital mobile radio systems
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Davis, CA, USA
Abstract :
The spectral/power efficiency and performance of the π/4-quadrature phase-shift keying (QPSK) modems (American and Japanese digital cellular emerging standards) are studied and briefly compared to GMSK modems (proposed for European Digital European Cordless Telephone System) (DECT) and Group Special Mobile System (GSM) cellular standards). Improved filtering strategies and digital pilot aided (digital channel sounding) techniques are considered for π/4-QPSK and for other digital modems. More spectrally efficient modem trends and some research results for future cellular/mobile (land mobile) and satellite communication systems applications are also highlighted
Keywords :
cellular radio; cordless telephone systems; digital radio systems; minimum shift keying; modems; phase shift keying; satellite relay systems; standards; DECT; Digital European Cordless Telephone System; Europe; GMSK; GSM; Group Special Mobile System; Japan; QPSK; USA; cellular radio; digital cellular standards; digital channel sounding; digital mobile radio systems; digital pilot aided techniques; filtering; land mobile radio; modems; performance; pi /4-quadrature phase-shift keying; power efficiency; research; satellite communication systems; spectral efficiency; Base stations; Communication standards; GSM; Land mobile radio; Modems; Radio frequency; Standards development; Telecommunication standards; Telephony; USA Councils;
Conference_Titel :
Communications, 1991. ICC '91, Conference Record. IEEE International Conference on
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-0006-8
DOI :
10.1109/ICC.1991.162423
