Title :
A low-rate voice/video personal communicator scheme
Author :
Hanzo, L. ; Streit, J. ; Salami, R.A. ; Webb, W.T.
Author_Institution :
Southampton Univ., UK
Abstract :
A personal communication system (PCS) transceiver is proposed and investigated. A 4.8 kbit/s transformed binary pulse excited (TBPE) linear predictive speech codec, source sensitivity matched Bose-Chaudhuri-Hocquenghem (BCH) block error correction codecs, non-coherent differentially coded non-coherent 16-level quadrature amplitude modulation (16-QAM) modem and packet reservation multiple access (PRMA) are deployed. The 2.15 kBd transceiver necessitates a signal-to-noise ratio (SNR) and signal-to-interference ratio (SIR) in excess of about 24 dB over Rayleigh-fading channels in order to support 10-11 nearly un-impaired voice conversations within a bandwith of 30 kHz. Additionally, by reserving two PRMA time slots for video telephony, an 8.52 kbps videophone user can also be supported
Keywords :
BCH codes; Rayleigh channels; block codes; digital radio; fading; packet reservation multiple access; personal communication networks; quadrature amplitude modulation; speech codecs; transceivers; videotelephony; voice communication; 16-QAM modem; 24 dB; 30 kHz; 4.8 kbit/s; 8.52 kbit/s; BCH codecs; Bose-Chaudhuri-Hocquenghem code; PCS transceiver; PRMA; Rayleigh-fading channels; SIR; SNR; bandwith; block error correction codecs; channel coding; linear predictive speech codec; low-rate voice/video personal communicator; noncoherent differentially coded 16QAM; packet reservation multiple access; personal communication system; signal-to-interference ratio; signal-to-noise ratio; transceiver; transformed binary pulse excited codec; video telephony;
Conference_Titel :
Radio Receivers and Associated Systems, 1995., Sixth International Conference on
Conference_Location :
Bath
Print_ISBN :
0-85296-643-1
DOI :
10.1049/cp:19951108
