Quasi-GMSK modulator

Details Quasi-GMSK modulator Quasi-GMSK modulator

1997-08-28

1999-08-24

Kinkead, Arnold

Modulators

Frequency shift keying modulator or minimum shift keying...

Including logic element

332100, 375305, H03C 300, H04L 2712

Patent

active

059429550

ABSTRACT:
In order to provide a digital GMSK modulator operating sufficiently stably without aliasing distortion even with a sampling rate of twice of that of input signal, a quasi-GMSK modulator of the invention comprises: integration means (105) for integrating an input signal; filtering means (106, 107) for performing a digital Gaussian filter manipulation of output of the integration means with a low sampling rate of twice or more of a data rate of the output of the integration means; a phase modulator (107, 108 and 111) for obtaining a continuous wave phase-modulated with output of the filtering means; and a limiter (112) for limiting amplitude of the continuous wave within a fixed value.

REFERENCES:
patent: 5022054 (1991-06-01), Wang

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