Patent
1976-12-29
1978-08-22
Safourek, Benedict V.
H04L 2508
Patent
active
041092040
ABSTRACT:
A method for transmitting information with a desired bandwidth while suppressing interference due to harmonics of a system-wide signal, by transmitting each bit of information as a pair of spaced rectangular envelope modulation pulses having a time interval therebetween essentially equal to the reciprocal of the difference between the frequencies of a carrier and of adjacent harmonics of the undesired system-wide signal. A sequential plurality of double-pulse modulating waveforms can be transmitted for reception by a receiving means having a like plurality of demodulators each synchronized and sequentially enabled only when one of the pair of modulating pulses are present. A novel double-pulse demodulator means, capable of essentially rejecting undesirable harmonics in a system utilizing a data carrier modulated to be interlaced between sequential harmonics of a system-wide signal, and novel means for synchronous gating thereof, are disclosed.
REFERENCES:
patent: 2464667 (1949-03-01), Boosman et al.
patent: 2698896 (1955-01-01), Rinia
patent: 3162857 (1964-12-01), Sanders
patent: 3440353 (1969-04-01), Salmet
patent: 3745361 (1973-07-01), Boyd et al.
patent: 4037248 (1977-07-01), Iijima et al.
Kincaid Thomas G.
Stutt Charles A.
Cohen Joseph T.
General Electric Company
Krauss Geoffrey H.
Safourek Benedict V.
Snyder Marvin
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