A new initial acquisition technique for PCM-TDMA satellite communications system
Abstract
Initial acquisition (IA) techniques which are unaffected by the nonlinearity of a satellite transponder and are applicable to spotbeam TDMA operation are discussed. The adequacy of the IA technique is estimated by acquisition accuracy, elapsed time for the acquisition process, and hardware simplicity. It is shown that carrier pulse is to be preferred to continuous carrier as an acquisition signal while taking into account the nonlinearity of the satellite transponder. However, an approach that uses only one swept carrier pulse has disadvantages related to the necessity of range prediction and the lack of acquisition accuracy in the spotbeam TDMA operation. These drawbacks are overcome by developing a feasible acquisition technique that employs two kinds of carrier pulse. Although this new technique is similar to classical radar detection, it is capable of determining the time to transmit a burst simply and automatically.
- Publication:
-
3rd International Conference on Digital Satellite Communications
- Pub Date:
- 1975
- Bibcode:
- 1975dsc..conf..281K
- Keywords:
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- Carrier Frequencies;
- Communication Satellites;
- Pulse Code Modulation;
- Satellite Transmission;
- Signal Detection;
- Time Division Multiplexing;
- Acquisition;
- Pulse Communication;
- Pulse Duration;
- Transponders;
- Wireless Communication;
- Communications and Radar