Experimental results on tracking performance of the MTDD Costas loop with UQPSK signal
Abstract
The carrier tracking performance of the breadboard Costas Loop of the Multimegabit Telemetry Demodulator Detector System was tested with unbalanced quadriphase shift keying (UQPSK) signals. An S-band UQPSK modulator was built for the tests. The experimental results are very close to the theoretical rms phase error calculations. The test and analysis show that the rms phase error for UQPSK signals is less than 5 deg at the design point if the I-to-Q channel power ratio is larger than 6 dB.
- Publication:
-
The Telecommuniations and Data Acquisition Progress Rept. 42-64
- Pub Date:
- August 1981
- Bibcode:
- 1981tdar.rept..109P
- Keywords:
-
- Demodulators;
- Phase Detectors;
- Phase Shift Keying;
- Signal Detection;
- Telemetry;
- Tracking Radar;
- Channel Noise;
- Deep Space Network;
- Performance Prediction;
- Phase Error;
- Signal To Noise Ratios;
- Space Communications, Spacecraft Communications, Command and Tracking