Process for tunnelized cyclostationary to achieve low-energy spectrum sensing
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsMichael P. Anthony, Jack Chuang, Apurva N. Mody, Chad M. Spooner
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Abstract
A system and method use tunnelizing for analyzing frequency spectrum. The method may include the steps of under sampling an input signal to take samples in one or more tunnels each with a tunnel bandwidth that is equal to or less than a total analysis bandwidth of the input signal; detecting one or more cyclostationary features of the input signal based on the samples; and determining one or more signal types of the one or more cyclostationary features based on the one or more cyclostationary features.
Claims20
A method comprising the steps of:
- under sampling, by a channelizer, an input signal to create one or more tunnels;
- taking tunnelized signal samples in the one or more tunnels each with a tunnel bandwidth that is equal to or less than a total analysis bandwidth of the input signal;
- performing whitening, by a whitener circuit, of the tunnelized signal samples;
- estimating, by a block averaging of a cyclic periodogram, a spectral correlation function of the tunnelized and whitened signal samples;
- detecting, by analyzing results of the spectral correlation function, various second and higher order cyclostationary features of the input signal;
- and
- determining one or more signal types based on one or more of the various second and higher order cyclostationary features that have been detected.
Dependencies are inferred from the claim text.