Telecommunications – Receiver or analog modulated signal frequency converter – Modulation distortion or cross talk correction or elimination
Patent
1991-08-05
1994-04-26
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Modulation distortion or cross talk correction or elimination
455307, 455313, 455258, 333 171, H04B 114
Patent
active
053075153
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.
REFERENCES:
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patent: 4192970 (1980-03-01), Kahn
patent: 4206317 (1980-06-01), Kahn
patent: 4352208 (1982-09-01), Schroeder
patent: 4356567 (1982-10-01), Eguchi et al.
patent: 4388731 (1983-06-01), King
patent: 4907293 (1990-03-01), Ueno
Kennedy John F.
Kuo Yao H.
Eisenzopf Reinhard J.
Ford Motor Company
May Roger L.
Mollon Mark
Wisler Mark D.
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