Time modulation with cosine function

Details Time modulation with cosine function Time modulation with cosine function

2008-08-01

2011-10-25

Johnson, Ryan (Department: 2817)

Modulators

Pulse or interrupted continuous wave modulator

Pulse position, frequency, phase, or spacing modulator

C332S109000, C329S313000, C329S312000, C375S239000, C375S238000

Reexamination Certificate

active

08044744

ABSTRACT:
A method and apparatus is described for a time modulated signal. A cosine function is used as the basis for the signal with time intervals at the maximum and minimum values of the cosine function defining the encoded data. The received waveform is twice differentiated to provide a cosine function from which zero crossings are detected and the time intervals determined.

REFERENCES:
patent: 5332975 (1994-07-01), Young et al.
patent: 5696790 (1997-12-01), Graham et al.
patent: 6678321 (2004-01-01), Graham et al.
Graham, Martin H. “Biphase Multiple Level Communications,” U.S. Appl. No. 09/221,291, filed Dec. 23, 1998.
Shannon, C.E. “A Mathematical Theory of Communication,”Bell System Technical Journal, vol. 27, pp. 379-423 and 623-656, Jul. and Oct. 1948.

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