Frequency agile radio

Details Frequency agile radio Frequency agile radio

1993-08-10

1994-12-27

Barron, Jr., Gilberto

Pulse or digital communications

Repeaters

Testing

342 18, 370 50, 380 34, H04J 400, H04L 2726

Patent

active

053772229

ABSTRACT:
A frequency agile spread spectrum radio system which uses a frequency-agile receiver that adaptively learns which frequencies to avoid as being occupied or jammed. The transmitter sends redundant transmissions on widely separated pseudo-random carrier frequencies to overcome jammed channels. A coded preamble is used to provide a greatly enhanced hybrid form of Time Division Multiple Access/Frequency Division Multiple Access for co-existence and frequency re-use with nearby systems. Anti-jam margins of 60 to 90 dB can be inexpensively achieved, far exceeding that of traditional direct sequence systems. The receiver scans the radio spectrum, identifies occupied portions, stores information on these occupied portions, skips over the occupied portions for a set period of time while scanning for radio signals, detects a repetitive preamble code in a received radio signal, maintains the frequency of the received radio signal, and receives and decodes message data in the received radio signal.

REFERENCES:
patent: 4328497 (1982-05-01), Vale
patent: 4334322 (1982-06-01), Clarke, III
patent: 4558453 (1985-12-01), Mimken
patent: 4606041 (1986-08-01), Kadin
patent: 4628270 (1986-12-01), Roberts
patent: 4704585 (1987-11-01), Lind
patent: 4752939 (1988-06-01), Amoroso et al.
patent: 4761796 (1988-08-01), Dunn et al.
patent: 4773085 (1988-09-01), Cordell
patent: 4799062 (1989-01-01), Sanderford, Jr. et al.
patent: 4872182 (1989-10-01), McRae et al.
patent: 4914649 (1990-04-01), Schwendeman et al.
patent: 4977577 (1990-12-01), Arthur et al.
patent: 5005169 (1991-04-01), Bronder et al.
patent: 5146187 (1992-09-01), Vandegraaf
M. K. Simon, J. K. Omura, R. A. Scholtz and B. K. Levitt, Spread Spectrum Communications, vol. 3, pp. 208-279, and pp. 346-407, Rockville, Md: Computer Science Press, 1985.

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