Adjacent channel controller for radio receiver
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United States of America Patent
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Apr 26, 1994
Grant Date -
N/A
app pub date -
Aug 5, 1991
filing date -
Aug 5, 1991
priority date (Note) -
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Abstract
The radio receiver of the present invention detects the presence of adjacent channel interference in either the lower adjacent channel or the upper adjacent channel and shifts the received signals to remove the adjacent channel interference from the intermediate frequency passband, but only if the other adjacent channel is clear. A maximum amount of the desired signal is retained so that modulation distortion is low. Frequency limits for shifting of the desired signals prevent undesirable amounts of phase distortion from being introduced into the audio signal.
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