Wireless reception system

Details Wireless reception system Wireless reception system

1984-10-01

1988-02-16

Buczinski, Stephen C.

Cryptography

Cryptanalysis

380 28, 380 38, H04L 900

Patent

active

047260645

ABSTRACT:
A wireless receiver for a PM (phase modulation) signal with a spectrum scrambling for relocation of speech spectrums for the privacy of purpose is comprised of an antenna for receiving PM modulated signals, an FM demodulator coupled with the antenna, a spectrum de-scrambler connected to output of the FM demodulator, an integration circuit connected to output of said spectrum de-scrambler, and an output terminal coupled with output of the integration circuit. Due to the location of the de-scrambler between the FM demodulator and the integration circuit, a noise spectrum of a reception signal is independent from a design of spectrum scrambling, and an excellent substantial S/N is obtained irrespective of spectrum scrambling.

REFERENCES:
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patent: 4525844 (1985-06-01), Scheuermann
patent: 4551580 (1985-11-01), Cox et al.
Automated Maritime Telephone System, by Komura, et al., Japan Telecom. Review 10/77, 304-12.

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