Radio pager with variable gain setting controlled according to p

Details Radio pager with variable gain setting controlled according to p Radio pager with variable gain setting controlled according to p

1992-06-25

1994-11-29

Kuntz, Curtis

Telecommunications

Transmitter and receiver at separate stations

4552341, 455254, H04B 106, H04Q 302

Patent

active

053697995

ABSTRACT:
A radio pager has a variable gain adjustable to high setting for normal reception or low setting at which the strength of intermodulation products is reduced in relation to the strength of a desired signal. A sync code contained in a received signal is detected to establish synchronization and a sync-absence signal is generated if it is not detected during a time interval in which it is expected to occur. The pager is initially switched to the high gain setting. In response to a first generation of the sync-absence signal, the pager recognizes that the desired signal is severely affected by intermodulation products and switches to the low gain setting so that the signal-to-noise ratio of the desired signal is improved. In response to a second generation of the sync-absence signal, the pager recognizes that its amplification gain is not sufficient and switches to the high gain setting to resume normal reception.

REFERENCES:
patent: 4961073 (1990-10-01), Drapac et al.

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