Sequential chirp modulation-type spread spectrum communication s

Details Sequential chirp modulation-type spread spectrum communication s Sequential chirp modulation-type spread spectrum communication s

1989-12-22

1992-01-28

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, H04L 2730

Patent

active

050849018

ABSTRACT:
A sequential chirp modulation-type spread spectrum communication system is disclosed relating to the FH-type which realizes fine transmission quality at low cost. It comprises at least primary and secondary digital sine wave generators of a program controlled-type mounted respectively on a transmitter of a transmitting side and a receiver of a receiving side. The primary sine wave generator generates a sine wave having a frequency which changes almost continuously and Pseudo-Random in the specified range of frequency according to the program. The primary digital sine wave generator also transmits the sine wave from the transmitting side after modulating the sine wave with the signals which should be transmitted. The secondary digital sine wave generator generates a sine wave having a frequency in which the specified frequency is a constant distance from the receiving signal frequency and receiving the receiving signal after demodulating.

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patent: 3981012 (1976-09-01), Brault et al.
patent: 4616364 (1986-10-01), Lee
patent: 4631541 (1986-12-01), Prickett et al.

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