Apparatus and method for reducing co-channel radio interference

Details Apparatus and method for reducing co-channel radio interference Apparatus and method for reducing co-channel radio interference

1995-09-12

2000-02-22

Vo, Nguyen

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

455225, 455296, H04B 110

Patent

active

060290536

ABSTRACT:
An apparatus and method reducing interference between multiple frequency modulated, FM, voice transmissions present in the same frequency bandwidth by receiving a radio signal which includes a first FM voice signal to be demodulated along with one or more additional FM voice signals which are present within a modulation bandwidth of the first FM voice signal, detecting the presence of a carrier frequency signal of the first FM signal and determining a lack of modulation of the detected carrier frequency signal by a voice signal, and squelching the received signal when the carrier signal is unmodulated.

REFERENCES:
patent: 4342120 (1982-07-01), Settlemire et al.
patent: 4829592 (1989-05-01), Weischhoff et al.

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