GMSK modulator formed of PLL to which continuous phase modulated

Details GMSK modulator formed of PLL to which continuous phase modulated GMSK modulator formed of PLL to which continuous phase modulated

1997-06-17

1998-10-20

Grimm, Siegried H.

Modulators

Frequency shift keying modulator or minimum shift keying...

332127, 375274, 375305, H04L 2712

Patent

active

058252576

ABSTRACT:
A Gaussian Minimum Shift Keying modulator that provides direct modulation of a carrier signal, produced by a single microwave high power voltage controlled oscillator. A continuous phase frequency shift keyed modulated signal with a modulation index of 0.5 is produced at the desired output frequency using a full 360 degree linear continuous phase modulator, controlled by a linear baseband signal that is the integral of the binary baseband information signal. This modulated signal is used as the reference signal for a phase locked high power voltage controlled oscillator. The phase locked loop provides frequency tracking and Gaussian spectral shaping to the modulated output signal.

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