Method and device for reducing RF transmission interference and use thereof in an interactive television network
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United States of America Patent
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-
Jun 20, 2000
Grant Date -
N/A
app pub date -
Sep 25, 1997
filing date -
Dec 6, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and device are provided for reducing RF transmission interference to a wanted signal of an interactive TV network which is impaired by an interfering signal present on a terrestrial and satellite RF network. The wanted signal is received in the presence of the interfering signal so as to obtain a received wanted signal in the presence of the interferer. The interfering signal transmitted by the satellite network is duplicated and delayed so as to obtain a received interfering signal similar to the interfering signal present with the wanted signal. The received interfering signal is subtracted from the wanted signal in the presence of the interfering signal, so as to deliver a received wanted signal free of interfering signal.
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