VHF Sensor in-band radio relay

Details VHF Sensor in-band radio relay VHF Sensor in-band radio relay

1981-11-27

1983-09-20

Bookbinder, Marc E.

Telecommunications

Carrier wave repeater or relay system

Common antenna

455 24, H04B 714

Patent

active

044060165

ABSTRACT:
Disclosed is an in-band, non-sampling, real time VHF radio relay or signal epeater for use in two-way, multi-hop remote sensor data links. Each signal repeater comprises a transceiver which includes interference cancellation circuits for preventing the high level signal produced by the radio repeater's transmitter section from desensitizing the low noise RF amplifier circuitry incorporated in the front end of the radio repeater's receiver section. Such apparatus is utilized to implement a remote sensor data collection network consisting of a plurality of subject radio repeaters and several sensors normally arranged in groups. The data which flows over the relay network can either originate at the sensors and flow to a read out station or it may originate at the read out station and flow to the sensors. Sensor originated information may be either digital or analog, or both, while read-out station originated information is digital only. The relay operates with either analog or digitally-modulated signals. When used with an omnidirectional antenna, it is not direction-preferential.

REFERENCES:
patent: 3566234 (1971-02-01), Thomson
patent: 3611139 (1971-10-01), George
patent: 3696429 (1972-10-01), Tressa
patent: 4317217 (1982-02-01), Davidson et al.

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