Method of and apparatus for transmitting clandestine radio...

Details Method of and apparatus for transmitting clandestine radio... Method of and apparatus for transmitting clandestine radio...

H - Electricity

04

K

325/3

H04K 1/00 (2006.01) H04B 5/00 (2006.01)

Patent

CA 1105089

ABSTRACT OF THE DISCLOSURE Clandestine signals are transmitted by using a surface wave acoustic device to disperse the spectrum of a pulse-modulated CW carrier. The dispersed signal is itself modulated and then transmitted to a remote location, at low level. At the remote location, an acoustic device of conjugate characteristics is used to recover the dispersed signal from out of the background noise.

306578

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