A combined analog and digital transmission system
Abstract
A system providing low density frequency division multiplex channels on the same radio baseband with multiple Pulse Code Modulated inputs has been developed. This technology permits extending the life of existing FM radio links by providing the means to carry digital information above existing FDM circuits. PCM accomodates subscriber concentrators or other special service functions better than FDM circuits and also leads into future digital switches.
- Publication:
-
Imaginative Engineering thru Education and Experience
- Pub Date:
- 1977
- Bibcode:
- 1977ieee.conf....5K
- Keywords:
-
- Analog Data;
- Channels (Data Transmission);
- Digital Systems;
- Frequency Division Multiplexing;
- Pulse Code Modulation;
- Concentrators;
- Data Transmission;
- Digital Data;
- Frequency Modulation;
- Modems;
- Multichannel Communication;
- Radio Relay Systems;
- Switching Circuits;
- Systems Engineering;
- Transmission Efficiency;
- Communications and Radar