A method for transponder capacity and link performance optimization in preassigned multilevel SCPC systems
Abstract
A method is presented for the optimization of fully-loaded transponder capacity in a preassigned multilevel SCPC (single channel per carrier) system having mixtures of earth antenna sizes and voice and data traffic. Different groups of carriers are formed based on the traffic requirement and on the typical characteristics of the link destinations. An expression of the carrier to third-order modulation ratio as a function of carrier frequency is derived, and the squared carrier-to-noise ratio difference objective function is formulated. The Fletcher-Powell (1963) optimization method is then used to determine the input relative carrier power level. It is shown that the suboptimum plans tend to be the ones having a high number of carrier levels.
- Publication:
-
IEEE Transactions on Communications
- Pub Date:
- March 1981
- Bibcode:
- 1981ITCom..29..314N
- Keywords:
-
- Channel Capacity;
- Optimization;
- Radio Relay Systems;
- Single Channel Per Carrier Transmission;
- Transmission Efficiency;
- Transponders;
- Antenna Design;
- Carrier Frequencies;
- Data Links;
- Ground Stations;
- Modulation;
- Signal To Noise Ratios;
- Systems Engineering;
- Voice Communication;
- Communications and Radar