A low-rate multi-level voice/video transceiver for personal communications |
| |
| Authors: | L Hanzo J Streit R A Salami W T Webb |
| |
| Affiliation: | (1) Department of Electronics and Computer Science, University of Southampton, SO171BJ Southampton, UK;(2) Present address: Department of Electrical Engineering, University of Sherbrook, Quebec, Canada;(3) Present address: Smith Associates, 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, embedded source sensitivity-matched binary Bose-Chaudhuri-Hocquenghem (BCH) block error correction codecs, non-coherent differentially coded 16-level quadrature amplitude modulation (16-QAM) modem and packet reservation multiple access (PRMA) are deployed. The 2.15 kBd transceiver requires 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 bandwidth of 30 kHz. Additionally, by reserving two PRMA time slots for video telephony, an 8.52 kbps videophone user can also be supported.The constructive criticism of the anonymous Reviewers is gratefully acknowledged. |
| |
| Keywords: | Wireless multimedia communications mobile voice and video telephony transformed binary pulse excited speech coding multilevel modulation packet reservation multiple access the Pan-American IS-54 mobile system |
| 本文献已被 SpringerLink 等数据库收录！ |
|
