Carrier-detector extends acquisition range of BPSK
Abstract
The capture and tracking range of a Costas type BPSK (QPSK) demodulator is limited by its loop bandwidth, which is determined by the synchronization threshold at different Signal-to-Noise Ratio. A frequency locked scheme, which consists of a carrier detector and digital control network, has been developed to work in parallel with the Costas loop, so the BPSK (QPSK) demodulator would be automatically led to its pull-in range at low Signal-to-Noise Ratio. The probabilities of false dismissal for signal and false alarm signal absent are analyzed.
- Publication:
-
ITC/USA/'82; Proceedings of the International Telemetering Conference
- Pub Date:
- 1982
- Bibcode:
- 1982isa..conf..393C
- Keywords:
-
- Carrier Waves;
- Phase Locked Systems;
- Phase Shift Keying;
- Signal Detectors;
- Signal To Noise Ratios;
- Tracking Filters;
- Bandpass Filters;
- Digital Systems;
- Feedback Control;
- Performance Prediction;
- Phase Demodulators;
- Probability Theory;
- Communications and Radar