Signal processing device for use on radio links

Details Signal processing device for use on radio links Signal processing device for use on radio links

1982-12-27

1984-06-26

Ng, Jin F.

Telecommunications

Transmitter and receiver at separate stations

With control signal

381104, 455 42, H04B 164

Patent

active

044570201

ABSTRACT:
A signal processor processes communication signals for a communication link by extracting amplitude information from the signal and converting this amplitude information into two signal tones. The frequency information of the communication system is transmitted as a constant amplitude signal with two narrowband FM control channels. Each control channel is used to transmit one of the two tones. After the communication signal is received, the two tones are removed from the narrowband FM control channels and are used to generate control signals that will control a variable gain amplifier and transfer the amplitude information back to the constant amplitude signal thereby facilitating the reception of the communication system.

REFERENCES:
patent: 3458815 (1969-07-01), Becker
patent: 3885111 (1975-05-01), Ishigami et al.
patent: 4225967 (1980-09-01), Miwa et al.
CCIR Recommendations 455-1 dated 1970 through 1974, entitled "Improved Transmission System for HF Radiotelephone Circuits", pp. 82-93.

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