SMSK And MSK demodulator

Details SMSK And MSK demodulator SMSK And MSK demodulator

1981-05-29

1984-04-24

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329124, 375 90, 375120, H04L 2714

Patent

active

044450940

ABSTRACT:
An SMSK or MSK demodulator utilizing a Costas type closed loop wherein the voltage controlled oscillator is offset from the apparent carrier frequency of the SMSK or MSK signals so that the in-phase arm of the loop provides data at the output and the quadrature arm of the loop provides an indication that the loop is locked and, in combination with the data output, provides a control signal for the VCO which maintains the loop locked.

REFERENCES:
patent: 3745255 (1973-07-01), Fletcher et al.
patent: 4238739 (1980-12-01), Mosley et al.
patent: 4314206 (1982-02-01), Attwood et al.
patent: 4336500 (1982-06-01), Attwood
patent: 4344178 (1982-08-01), Waters

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