H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/6
H04B 7/15 (2006.01) H04B 7/155 (2006.01)
Patent
CA 1188740
ABSTRACT Disclosed is an in-band, non-sampling, real time VHF radio relay or signal repeater 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 omni- directional antenna, it is not direction-preferential.
416626
Abrams Burton S.
Zeger Andrew E.
Aspila Kalevi P.
The Government Of The United States As Represented By The Secret
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