Track state and received noise power-based mechanism for selecting demodulator processing path in spatial diversity, multi-demodulator receiver system

摘要

A receiver terminal has plural demodulators coupled to spatially diverse signal receiving apertures with different views of a transmitter. A controller monitors the track state of the time/frequency error tracker and received noise power of each demodulator. Timing error and frequency error measurements from whichever demodulator's time/frequency tracker exhibits the best performance, and corrected to account for the spatial diversity of the signal receiving apertures, are coupled by the controller to another demodulator to update its time/frequency tracker.