A coupled phase-locked loops system for carrier tracking improvement
Abstract
A system that couples several phase-locked loops to improve carrier tracking performance is considered. It coherently combines the received carrier signals at geographically separated ground antennas to increase the total effective aperture. The received carrier's phases are automatically aligned to enhance the received carrier signal-to-noise ratio. The system's tracking performance is assessed in terms of rms phase jitter. It is shown that the phase-locked loop in the first receiver, where the carrier arraying is performed, tracks the received carrier phase using the received carrier power from all receivers.
- Publication:
-
ICC 1982 - The Digital Revolution, Volume 3
- Pub Date:
- 1982
- Bibcode:
- 1982icc.....3....5D
- Keywords:
-
- Carrier Waves;
- Communication Networks;
- Phase Locked Systems;
- Satellite Networks;
- Spacecraft Communication;
- Antenna Arrays;
- Bandpass Filters;
- Block Diagrams;
- Phase Deviation;
- Signal Reception;
- Signal To Noise Ratios;
- Space Communications, Spacecraft Communications, Command and Tracking