A case for RADA technique using satellites for marine communication
Abstract
The traffic requirements of the merchant ships as well as for others are of low density and random in nature. As such, it is uneconomical to provide dedicated channels to the ships. Demand assignments and RADA (Random Access Discrete Address) techniques are useful in such situations. RADA technique is the most efficient system in which by using a satellite transponder, the problem of coverage is easily solved. A new RADA technique is being developed using ARWM (Adaptive Rectangular Wave Modulation) modulation and its characteristics are discussed in the paper. It is shown that the ARWM-SSMA will support 10 talkers per MHz of channel bandwidth with simple hardware.
- Publication:
-
Indian Journal of Electronics Telecommunication Engineering Division
- Pub Date:
- August 1977
- Bibcode:
- 1977InJET..58....6D
- Keywords:
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- Communication Satellites;
- Maritime Satellites;
- Multiplexing;
- Random Signals;
- Channels (Data Transmission);
- Pulse Code Modulation;
- Ships;
- Signal Encoding;
- Signal To Noise Ratios;
- Transponders;
- Communications and Radar