System for extracting timing information from a digital waveform

Details System for extracting timing information from a digital waveform System for extracting timing information from a digital waveform

1981-02-11

1982-10-19

Ng, Jin F.

Pulse or digital communications

Spread spectrum

Direct sequence

360 51, H04L 700

Patent

active

043554083

ABSTRACT:
System for extracting timing information from a digital waveform supplied to the system in which the waveform is modulated by a modulator, passed through a surface acoustic wave transversal filter and demodulated by a demodulator. Zero crossings in the resultant transformed waveform are detected by a detector and used to determine the times at which another version of the original waveform is sampled by a sampling circuit.
The characteristics of the surface acoustic wave transversal filter are chosen to be such that each elementary pulse in the original waveform is transformed into an oscillatory waveform, the zero crossings of the different oscillatory waveforms coinciding with one another and defining the sampling times.

REFERENCES:
patent: 3019296 (1962-01-01), Schelleng
patent: 4312075 (1982-01-01), Murano et al.

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