Minimum shift keyed saw device and method

Details Minimum shift keyed saw device and method Minimum shift keyed saw device and method

1993-03-19

1995-11-28

Chin, Stephen

Pulse or digital communications

Transmitters

Angle modulation

375274, 332100, 333193, H04L 2712

Patent

active

054714990

ABSTRACT:
A surface acoustic wave (SAW) device is described that comprises a piezoelectric medium using input and output transducers for launching and detecting a surface acoustic wave on the piezoelectric medium. In particular, a device is described that uses a special combination of transducers for the direct generation of a coded minimum shift keyed (MSK) waveform from an input impulse waveform. The same device is used for the direct detection of an input MSK waveform in order to generate an impulse waveform with sidelobe characteristics similar to those expected from a specific code. The SAW device provides the advantages of MSK encoded waveforms for spread spectrum applications and the advantage of implementing such entirely on a SAW substrate.

REFERENCES:
patent: 3749984 (1973-07-01), Benyon, Jr. et al.
patent: 3969590 (1976-07-01), Jain et al.
patent: 4592009 (1986-05-01), Masheff
patent: 5001723 (1991-03-01), Kerr
patent: 5033063 (1991-07-01), Okamoto et al.
W. Richard Smith, "Saw Filters for CPSM Spread Spectrum Communication", IEEE Ultrasonics Symposium Proceedings, pp. (524-528) (1977).

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