Packet hopping system with sliding frequency, and transciever fo

Details Packet hopping system with sliding frequency, and transciever fo Packet hopping system with sliding frequency, and transciever fo

1995-06-30

1999-04-27

Vo, Don N.

Pulse or digital communications

Repeaters

Testing

375204, 375272, H04B 1713

Patent

active

058987339

ABSTRACT:
Packets of data are transmitted over a distributed communications network formed by a number of transceivers. To minimize interference by other signals, the carrier frequency of each transmission is varied compared with the last transmission by that transceiver, for example by using a linearly sliding carrier frequency which varies continuously during periods of inactivity and while transmitting. The receivers scan the band at a rate sufficient to detect a preamble carrier burst preceding each data packet. The transceivers operate asynchronously with low data rate FSK signals, using carrier frequencies between 900 and 950 MHz.

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V.R. Hohman, 900-MZ Radio Provides Two-Way Path Control & Return, Transmission & Distribution (Jun. 1984) pp. 33-36.
G.W. Kelly, "Sona/ECS a Decentralized Environmental Control System", Proc. IEEE Comp. Soc. Workshop on Computing Aid to the Handicapped, Nov. 4-5, 1982, p. 103.

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