Control apparatus and control method for attenuating radio signa

Details Control apparatus and control method for attenuating radio signa Control apparatus and control method for attenuating radio signa

1995-12-29

1998-09-08

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455343, 4551491, 34082544, H04B 700, H04Q 302, H04Q 914

Patent

active

058059792

ABSTRACT:
A radio apparatus judges whether the electric field intensity of a radio signal detected by a level detector is high by a comparator. The radio apparatus detects a synchronizing signal for making synchronization with the radio apparatus from the radio signal by a synchronizing signal detector. Moreover, the radio apparatus detects the bit rate of an information stop signal in a system using a POCSAG signal of a radio selective-calling receiver from the radio signal by a stop signal detector. When the electric field intensity of the radio signal is high, the synchronizing signal is not detected, and the bit rate of the information stop signal is not detected, the radio apparatus decides by a decision circuit that cross modulation occurs in the radio signal and attenuates the radio signal by turning on an attenuator.

REFERENCES:
patent: 5144296 (1992-09-01), DeLuca et al.
patent: 5448774 (1995-09-01), Yokozaki et al.

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