Phase distortion adaptive detector of minimum shift keying data

Details Phase distortion adaptive detector of minimum shift keying data Phase distortion adaptive detector of minimum shift keying data

1984-03-12

1986-02-04

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 96, 329104, H03D 300

Patent

active

045690618

ABSTRACT:
The minimum shift keying (MSK) data detection system described compensates for the differential phase shift distortion produced by passing the MSK signal through a voice grade audio channel such as a VHF AM transmitter and receiver. This distortion varies and is dependent on the particular transmitter and receiver being used. The detection system examines the preamble of the MSK signal and measures the differential phase shift of the two modulating tone. This measured value is then used to establish pre-distorted waveforms to which the incoming data is compared for detection.

REFERENCES:
patent: 3992617 (1976-11-01), Epstein
patent: 4020283 (1977-04-01), Epstein
patent: 4028490 (1977-06-01), Epstein
patent: 4414675 (1983-11-01), Comroe
Suzuki et al., "Single-Chip CMOS MSK Coherent Demodulator" Electronic Letters, Jun. 24, 1982, vol. 18, No. 13.

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