Proposed open-loop analog/digital signal-processing system would be Costas-loop error detector functioning in closed-loop manner overall. Detector estimates difference between frequency of input signal and internal reference oscillator. Estimate used to close frequency-control loop. Precise symbol timing not necessary. Performance better than systems that effect open-loop acquisition using integrators instead of low-pass filters in arms of Costas loops and in which performance varies with symbol timing.
Open-Loop Acquisition Of Frequency In BPSK
NASA Tech Briefs ; 16 , 9
1992-09-01
Miscellaneous
No indication
English
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