Process and method for wide band transmission, particularly for

Details Process and method for wide band transmission, particularly for Process and method for wide band transmission, particularly for

1986-02-13

1988-08-09

Caldwell, Sr., John W.

Communications: electrical

Systems

Selsyn type

340310A, 375 1, H04M 1104

Patent

active

047631031

ABSTRACT:
At transmission (10) each bit for transmission is coded as a function of its state by producing (12) a particular coding frequency combination, these being divided into two distinct bands spaced one from another and the coding combinations being chosen such that frequencies ranked in the same sequence place in these combinations do not occupy the same frequency band. A signal comprising the coding combination is injected to the network (N,P) and at reception (20), is applied to demodulators (22, 23), each assigned to one respective frequency band, to be correlated with locally generated signals (25, 26) which reproduce the coding combinations with a constant frequency shift, the bit state being determined (24) as a function of the correlation output.

REFERENCES:
patent: 3909527 (1975-09-01), Ohta
patent: 3953798 (1976-04-01), Sjostrand et al.
patent: 4239940 (1980-12-01), Dorfman
patent: 4306308 (1981-12-01), Nossen
patent: 4307380 (1981-12-01), Gander
patent: 4553101 (1985-11-01), Mathis
patent: 4583231 (1986-04-01), Puckette
patent: 4597087 (1986-06-01), Kadin
patent: 4616364 (1986-10-01), Lee
IEEE Transactions on Aerospace and Navigational Electronics, vol. ANE-11, No. 4, Dec. 1964, pp. 285-291, New York, US; K. W. Otten.

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