Ciphering device improving the secrecy of the encoded replies of

Details Ciphering device improving the secrecy of the encoded replies of Ciphering device improving the secrecy of the encoded replies of

1977-08-08

1979-03-20

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 172PC, G01S 956

Patent

active

041456904

ABSTRACT:
A secondary radar system in which the transponder and central station possess for enciphering and deciphering complementary dispersive filters having expansion/compression factors of .theta..DELTA.F.sub.1, where .DELTA.F.sub.1 = 1/.DELTA..mu. is a measure of the spectral width of each reply pulse having a temporal width of .mu., .theta. being at least s .mu./.DELTA..mu., such that at least two adjacent pulses spaced s apart in the initial reply train are completely overlapped in the expanded reply.
The application to secondary radar systems, especially of the IFF type, in order to improve considerably the secrecy of the link between an airborne transponder and the ground station.

REFERENCES:
patent: 3654554 (1972-04-01), Cook
patent: 3969725 (1976-07-01), Couvillion et al.
patent: 4053889 (1977-10-01), Johnson

Affiliated with

Also associated with

Rating

Ciphering device improving the secrecy of the encoded replies of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ciphering device improving the secrecy of the encoded replies of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ciphering device improving the secrecy of the encoded replies of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-223637