Detection of time-frequency codes using a spectrogram

Details Detection of time-frequency codes using a spectrogram Detection of time-frequency codes using a spectrogram

2006-10-23

2009-11-17

Feliciano, Eliseo Ramos (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S071000, C702S074000, C702S076000

Reexamination Certificate

active

07620509

ABSTRACT:
A frequency hopping pattern of a frequency hopping signal is detected by use of spectrogram-generating software in a digital storage oscilloscope. By using a spectrogram, a hopping pattern can be determined without having to demodulate the signal, recover the phase or frequency of the carrier, determine optimal sample timing, or determine system timing. A block of data that contains at least one repetition of the hopping pattern in analyzed with respect to known hopping patterns as well as with respect to the duration in time of the relevant symbols of that data.

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