H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/120, 325/72
H04B 1/10 (2006.01) H04B 3/04 (2006.01) H04L 27/22 (2006.01)
Patent
CA 1200850
Abstract of the Disclosure: In an interference elimination device for use in a digital microwave communication system in which an inter- ference component results from at least one different microwave communication system sharing a frequency band in common, a controller (21) controls a device input signal so that a controlled signal thereby produced may include a controlled component which is equal in amplitude to the interference component and be antiphase relative thereto. The controlled signal is substracted from the device input signal to provide a difference signal which is free from the interference component. Together with the device input signal, the difference signal is supplied to a control signal producing circuit (41) for producing an amplitude and a phase control signal for the controller. Instead of the device input signal, an-interference signal derived by causing the device input signal to pass through a narrow-band filter (11 or 12) may be delivered to the controller and the control signal producing circuit. It is possible to use the difference signal as a device output signal and to implement the control signal producing circuit by an orthogonal multiplier.
420419
Seguchi Hiroshi
Tagashira Yoshimi
Yoshida Yasuharu
Nippon Electric Co. Ltd.
Smart & Biggar
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