00000nam 2200000zi 4500 9.932096 CaOODSP 20241009145343 m o d f cr |n||||||||| 240105e198103##onca||| ob f000 0|eng d CaOODSP eng rda CaOODSP n-cn--- Co22-652/1981E-PDF Mahmoud, Samy A., author. Analysis and design of mobile terminal transmitters for mixed voice and data packets in the 800 MHz frequency band / prepared by S.A. Mahmoud, D. Falconer, M. El-Tanany, J. Wight. [Ottawa] : [Department of Communications], March 1981. 1 online resource (184 pages) : illustrations text txt rdacontent computer c rdamedia online resource cr rdacarrier Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. "Submitted according to the terms of Contract No. OSU80-00131." Includes bibliographical references. "The implementation of an integrated voice/data communications system over mobile radio channels require the availability of two essential mobile terminal components: (1) a spectrum efficient modem with fast carrier and clock recovery circuits, and (2) an efficient low cost speech detector to suppress the RF carrier when no speech signal is generated at the audio input of the terminal. This report presents the design, implementation and testing results of fast clock and carrier recovery circuits to be used with a Tamed Frequency Modulator (TFM). The report also presents an approach for implementing a speech detector. The detector is simulated first using software algorithms run in real time with recorded mobile speech. The detector will then be implemented using the recently introduced signal processors on LSI chips (e.g. Intel 2920). An experimental RF subsystem is set up as a test bed for measuring the BER performance of the TFM system"--Abstract. Mobile radio stations. Radio Transmitters and transmission. Radio frequency modulation. Stations mobiles (Radio) Radio Émetteurs et transmission. Modulation de fréquence. Canada. Department of Communications, issuing body. PDF 2.05 MB https://publications.gc.ca/collections/collection_2024/isde-ised/co22/Co22-652-1981-eng.pdf