H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/7
H04B 7/14 (2006.01) H04B 7/155 (2006.01)
Patent
CA 1229133
ABSTRACT A radio relay digital communication system consists of terminal stations and relay stations each having radio repeat- ers using radio frequency of microwave or millimeter wave. The radio repeater usually receives a desired wave which is a correct wave for a route to which the terminal and relay stations belong; however, the radio repeater may happen to receive an undesired wave, whose level is beyond the threshold level of a squelch circuit in the radio repeater, produced by interference with a radio wave from adjacent different route for example. When the desired wave decays due to fading for example and the undesired wave becomes dominant, the terminal station of the route finds it impossible to determine which relay station has a fault. The radio repeater applying the present invention detects a received pilot signal from the received undesired wave; judges the received pilot signal to be incorrect for the route; stops a received main signal in the received undesired wave; and sends only a super- visory signal to successive relay stations with a correct pilot signal generated by the radio repeater, so that the terminal station can detect the pilot signal and recognize the state of the relay station from the supervisory signal.
467453
Fetherstonhaugh & Co.
Fujitsu Limited
LandOfFree
Radio relay method and its apparatus for digital communication does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radio relay method and its apparatus for digital communication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio relay method and its apparatus for digital communication will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1228897