Modulators – Frequency shift keying modulator or minimum shift keying...
Patent
1993-03-15
1994-06-21
Mis, David
Modulators
Frequency shift keying modulator or minimum shift keying...
375 48, 375 62, 331 18, 331 23, H03C 300, H03L 716
Patent
active
053231252
ABSTRACT:
A data transmitter (100) operating at a transmit frequency provides a modulated data signal (114) by adjusting a reference frequency signal (108). The method of modulating an N-level data signal (102) inputted to the transmitter (100) provides for inputting, to a signal processor (201), a frequency deviation value. Using the frequency deviation value, the signal processor (201) then determines a maximum rate of enabling the frequency adjustment. Further, a deviation ratio corresponding to one of the N-levels is determined, and an increment value is then calculated (302) using this deviation ratio. Lastly, the frequency adjustment is enabled (312, 320) using the calculated increment value.
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patent: 5289141 (1994-02-01), Nanni et al.
IEEE Trans. on Communications. The Duobinary Technique for High-Speed Data Transmission Author: A. Lender Electronics, vol. 82, May, 1963 pp. 214-218.
Hiben Bradley M.
Nanni Peter
Coffing James A.
Mis David
Motorola Inc.
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