METHOD FOR AUTOMATIC DETECTION OF NARROW-BAND SIGNALS (VERSIONS) Russian patent published in 2014 - IPC H04B1/10 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and specifically to methods of detecting narrow-band signals on a background of powerful radio-frequency radiations in conditions of a priori uncertainty of parameters thereof, and can be used in radio monitoring systems and on radio links. In the first version, the method comprises: receiving an analogue radio signal, digitising and forming a spectral representation of said signal; calculating the noise threshold level by calculating a limit threshold equal to double the value of the sample average of the modulus of a spectral representation component; forming a new sequence which takes into account the moduli of the spectral representation component which do not exceed the limit threshold, and components exceeding said threshold are assigned the value of said threshold; calculating the noise threshold level similar to the limit threshold from a component of the new sequence; a decision on detection is made based on results of comparing the value of the modulus of the spectral component and the noise threshold level. In the second version, the method is characterised by that when forming a new sequence of the spectral representation component, components whose values exceed the limit threshold value are not included in said sequence. The remaining procedures are performed the same as in the first version.

EFFECT: improved method.

2 cl, 6 dwg