Method and device for detecting aircraft radio signals transmitted in the same channel simultaneously
AssigneeRohde & Schwarz GmbH & Co. KG
InventorThorben Detert
Life of this patent
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Abstract
A method for detecting at least two amplitude-modulated transmitted signals contained in a received signal within the same frequency channel with respectively different frequency displacements, which determines from the received signal a modified received signal by means of a nonlinear signal processing. Following this, the spectrum of the modified received signal is determined by means of Fourier transform, and at least two transmitted signals contained in the received signal are detected if at least two first spectral lines each associated with carrier signals are significantly distinguishable within the determined spectrum from spectral components associated with noise signals and payload signals.
Claims19
A method for detecting at least two transmitted signals contained in a received signal within a same frequency channel with respectively different frequency displacements, comprising:
- determining a modified received signal by using nonlinear signal processing of the received signal;
- determining a spectrum of the modified received signal by using a Fourier transform;
- and
- detecting at least two transmitted signals contained in the received signal if at least two first spectral lines each associated with carrier signals are distinguishable within the determined spectrum from spectral components associated with noise signals and payload signals,
- wherein the at least two transmitted signals contained in the received signal are detected if the at least two first spectral lines of carrier signals contained in the modified received signal are identified within the determined spectrum, of which amplitudes are respectively a multiple of the mean value of an amplitude of the spectral components of the noise signals and payload signals contained in the modified received signal.
A device for detecting at least two transmitted signals contained in a received signal with different frequency displacements, comprising:
- a nonlinear signal processing unit for determining a modified received signal through nonlinear signal processing of the received signal;
- a Fourier transformer for determining a spectrum of the modified received signal;
- and
- a detector for identifying multiple first spectral lines associated respectively with carrier signals, which are distinguishable from spectral components associated with noise signals and payload signals, wherein at least two transmitted signals contained in the received signal are detected if the multiple first spectral lines of carrier signals contained in the modified received signal are identified within the determined spectrum, of which amplitudes are respectively a multiple of the mean value of an amplitude of the spectral components of the noise signals and payload signals contained in the modified received signal.
Dependencies are inferred from the claim text.