METHOD FOR DETECTING SIGNALS OF A KNOWN FORM BASED ON A VECTOR-COSINE SIMILARITY MEASURE Russian patent published in 2022 - IPC G01S7/292 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio electronics and hydroacoustics, namely, to methods for detecting and determining the matching of a signal of a known form when high-intensity interference is present in the transmission channel. Method for detecting signals of a known form based on a vector-cosine similarity measure consists in receiving a combination of the signal of a known form and noise; subjecting said combination to analogue-to-digital conversion; calculating the current value of the correlation function; comparing said function with the reference correlation function; forming a similarity measure of the current vector of description of the correlation function and the reference correlation function, and making a decision on the presence or absence of a desired signal by comparing the similarity measure with a set threshold; forming a vector representation of the current state of the correlation function from the received combination of a known signal and noise. The similarity measure is formed using the cosine of the angle between the vector of the current state of the correlation function and the vector of description of the reference correlation function.

EFFECT: increase in the probability of accurate detection and a simultaneous reduction in the probability of false detection of a signal at small values of the signal-to-noise ratio in the transmission channel.

1 cl, 12 dwg