Digital mobile unit having a function of issuing a tone level co

Details Digital mobile unit having a function of issuing a tone level co Digital mobile unit having a function of issuing a tone level co

1996-06-21

1998-08-25

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

455 677, 4552264, H04B 1700

Patent

active

057992444

ABSTRACT:
In order to adaptively control the level of an alarm which warns of imminent or impending communication interruption, an error information signal and data frame energy, which are both derived during the decoding of an incoming signal, are used. If the incoming signal is deteriorated to an extent that communication interruption is imminent, an alarm signal is issued and superimposed on a voice signal. The level of the alarm signal is controlled in accordance with the detected frame energy.

REFERENCES:
patent: 4403212 (1983-09-01), Masaki
patent: 5349698 (1994-09-01), Maru
patent: 5386209 (1995-01-01), Thomas
patent: 5615256 (1997-03-01), Yamashita

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