1 January 1987 A Data And Voice System For The General Service Telephone Network
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Proceedings Volume 0858, Signal Acquisition and Processing; (1987) https://doi.org/10.1117/12.968291
Event: IECON, Cambridge, 1987, Cambridge, MA, United States
Abstract
This paper describes a low cost system that simul-taneously provides a data and a voice channel over a standard general service telephone network (GSTN) 2-wire connection. Time domain harmonic scaling (TDHS) [1] is used to frequency compress the voice signal. Data rates up to 1200 bits/s full-duplex have been achieved using a low complexity quadrature amplitude modulation (QAM) algorithm. A real-time implementation has been built using three TMS32010 DSP chips for full-duplex operation.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James D. Mills, James D. Mills, Vivek P. Telang, Vivek P. Telang, Charles E. Rohrs, Charles E. Rohrs, } "A Data And Voice System For The General Service Telephone Network", Proc. SPIE 0858, Signal Acquisition and Processing, (1 January 1987); doi: 10.1117/12.968291; https://doi.org/10.1117/12.968291
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