Re: JF-17/FC-1 Fighter Aircraft thread 2009
It is. If you search F16 UHF communications then you will hear on certain frequencies strange buzzing. That is the interlink...
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2.6.1.2 Security
Both messages (bits) and transmissions (waveforms) are encrypted in Link-16. Messages are encrypted by a KGV-8B encryption device in accordance with a specified cryptovariable, i.e. key. Transmission security (TSEC) is provided by another cryptovariable that determines JTIDS waveform specifics. The waveform uses frequency hopping with a hop pattern determined by the net number and the TSEC cryptovariable.
Due to the constant relocation of the carrier frequency across the frequency spectrum, it is difficult to detect and difficult to jam.
The TSEC cryptovariable also determines the amount of jitter in a signal. Jitter is the delay, or dead time, that occurs at the beginning of each time slot where no pulse energy is transmitted. Varying the amount of jitter from time slot to time slot makes it difficult for a jammer to know when to turn on the jamming signal [Nor94].
The pseudorandom noise (PN) determined by the TSEC cryptovariable increases the TSEC of the JTIDS signal. This is accomplished by performing an exclusive-or operation (XOR) on 32 message bits with the 32-chip PN sequence of ones and zeroes. As a result, the transmitted data appears like incoherent noise to an unintended receiver [Nor94].
a chinese aero magazine reported that the UHF radio can be double as data link.
It is. If you search F16 UHF communications then you will hear on certain frequencies strange buzzing. That is the interlink...
>>>
2.6.1.2 Security
Both messages (bits) and transmissions (waveforms) are encrypted in Link-16. Messages are encrypted by a KGV-8B encryption device in accordance with a specified cryptovariable, i.e. key. Transmission security (TSEC) is provided by another cryptovariable that determines JTIDS waveform specifics. The waveform uses frequency hopping with a hop pattern determined by the net number and the TSEC cryptovariable.
Due to the constant relocation of the carrier frequency across the frequency spectrum, it is difficult to detect and difficult to jam.
The TSEC cryptovariable also determines the amount of jitter in a signal. Jitter is the delay, or dead time, that occurs at the beginning of each time slot where no pulse energy is transmitted. Varying the amount of jitter from time slot to time slot makes it difficult for a jammer to know when to turn on the jamming signal [Nor94].
The pseudorandom noise (PN) determined by the TSEC cryptovariable increases the TSEC of the JTIDS signal. This is accomplished by performing an exclusive-or operation (XOR) on 32 message bits with the 32-chip PN sequence of ones and zeroes. As a result, the transmitted data appears like incoherent noise to an unintended receiver [Nor94].