Using the subsampling for detecting band signals through two meters of aliasing in the application of a high-speed scanner
DOI:
https://doi.org/10.18041/1794-4953/avances.2.279Keywords:
Electronic warfare, FPGA, FFT, DSP, VHF, Subsampling, aliasingAbstract
This article presents part of a research result that shows how the disadvantage for sampling is used, at a different rate from that proposed by Nyquist-Shannon, and how to use this as an advantage to distinguish carriers in a specific communication channel using a fast Fourier transform. This paper proposes considering that in digital communications is inconvenient for the identification of a signal does not meet the criteria proposed by the Nyquist-Shannon sampling theorem, ie the frequency at which the signal is sampled, is minimal twice the signal frequency scanning. This advantage is used in the development of high-speed scanner, monitor signal blockers, disturbing and different communication equipment.
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