Pulse or digital communications – Repeaters – Testing
Patent
1980-11-28
1992-01-28
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
H04L 900
Patent
active
050848992
ABSTRACT:
An interference suppressor comprises an amplitude limiter (2) to which a received signal is coupled. The limiter (2) is effective, when a dominant interfering signal (f1) is present together with a wanted signal (f1), to further increase the amplitude difference between interfering and wanted signals.
A signal combiner (12) is fed with the received signal and also with a signal derived from the limiter (2) via a controlled attenuator (9) and which signal is arranged as to be in phase opposition to the received signal. A phase sensitive detector (8) is responsive to the output signal from the suppressor, which is provided by the signal combiner (12), and to the signal derived from the limiter (2) for providing a control signal for the attenuator (9). The control signal is effective to reduce the amplitude of the interfering signal present in the output signal.
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Cangialosi Salvatore
Siemens Plessey Electronic Systems Limited
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