Telecommunications – Transmitter and receiver at separate stations – Frequency or phase modulation
Patent
1989-08-25
1991-10-15
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Frequency or phase modulation
455 72, 333 16, 370 7, H04B 100, H04B 164
Patent
active
050582020
ABSTRACT:
A system for transmitting and receiving frequency modulated signals utilizes linked compressor/expander (Lincompex) techniques. The signal to be transmitted is first processed by a Lincompex modulator which infinitely compresses the signal and produces a control tone representative of this compression process. After being processed by the Lincompex modulator, the compressed signal is frequency modulated and transmitted. A receiver having a Lincompex demodulator is used to receive the modulated signal. The received signal is initially demodulated by a discriminator prior to being expanded by the Lincompex demodulator according to the received control tone.
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Cannon, Recording or Broadcasting Utilizing Automatic Gain Control Compressor, IBM Technical Disclosure Bulletin, vol. 10, No. 12, May 1968.
AMAF Industries, Inc.
Charouel Lisa
Eisenzopf Reinhard J.
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