Pulse or digital communications – Repeaters – Testing
Patent
1991-07-26
1993-06-22
Gregory, Bernarr E.
Pulse or digital communications
Repeaters
Testing
380 34, 380 48, 375120, H04L 2730
Patent
active
052220753
ABSTRACT:
The transmitter for a direct-sequence spread-spectrum communication system encodes its code rate into the phase difference between a pair of identically modulated, sum and difference frequency carries which it transmits to the receiver. The receiver, in turn, mixes the two carriers with each other to recover a signal having a frequency representing their phase difference, thereby enabling the receiver to derive a synchronous code rate from the phase difference signal, directly or by means of a resettable oscillator which is driven by the phase difference signal. If desired, the sum and difference frequency carrier may have overlapping sidebands in the frequency domain.
REFERENCES:
patent: 3641433 (1972-02-01), Mifflin et al.
patent: 4567588 (1986-01-01), Jerrim
patent: 4618996 (1986-10-01), Rafel et al.
patent: 4653076 (1987-03-01), Jerrim et al.
patent: 4953178 (1990-08-01), Ishigaki
R. C. Dixon, Spread Spectrum Systems, 2nd Edition, N.Y., Wiley, 1984, pp. 224-226 & 254-257.
A. Kesteloot, "A Practical Direct-Sequence Spread-Spectrum UHF Link," QST, May 1989, pp. 14-21.
Gregory Bernarr E.
Xerox Corporation
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