Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1994-11-17
1996-04-30
Faile, Andrew I.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
4552411, 4552461, 455254, 455296, 455 331, H04B 106
Patent
active
055133860
ABSTRACT:
A receiver for being mounted on an automobile telephone or similar mobile station which is included in a cellular mobile radio communication system. The receiver has a high frequency amplifier for amplifying a received input wave, and a mixer for converting the received input wave to an intermediate frequency. The gain of the amplifier or that of the mixer is changed on the basis of the level of the field strength of the received input wave and whether or not the mobile station is communicating with a base station. The receiver enhances the reception sensitivity characteristic at locations where the reception field strength is low or the intermodulation distortion characteristic at locations where the field strength is high and intermodulation distortions occur.
REFERENCES:
patent: 4025853 (1977-05-01), Addeo
patent: 4227256 (1980-10-01), O'Keefe
patent: 4310722 (1982-01-01), Schaible
patent: 4384362 (1983-05-01), Leland
patent: 4393513 (1983-07-01), Yokogawa et al.
patent: 4553105 (1985-11-01), Sasaki
patent: 4704738 (1987-11-01), Graziadei et al.
Hashimoto Kazuya
Ogino Tooru
Faile Andrew I.
NEC Corporation
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