METHOD FOR DETERMINING SPECTRUM DENSITY OF POWER OF ELECTRIC SIGNAL AS TO AUTOCORRELATION FUNCTION OF THIS SIGNAL Russian patent published in 2015 - IPC G01R23/16 

FIELD: radio engineering, communication.

SUBSTANCE: discrete values of autocorrelation function of an analysed signal are defined, and as per the above discrete values there defined are discrete values of spectrum power density. With that, range of controlled frequencies, which includes an analysed signal spectrum, is divided into small resolution elements, the size of which is determined by the required accuracy of spectrum analysis. They are numbered, and weight function depending on time, number and size of a resolution element is formed for each resolution element. Discrete values of autocorrelation function of the analysed signal are defined at time shifts suitable for their determination. Vector-matrix equation of measurements $$\overrightarrow{r}=w^T\overrightarrow{f}+\overrightarrow{n}$$ is composed, where vector $$\overrightarrow{r}$$ includes discrete values of autocorrelation function W - weight matrix determined by values of weight functions at autocorrelation function discretisation moments, $$\overrightarrow{f}$$ - spectrum vector including values of spectrum power density in each resolution element as components, $$\overrightarrow{n}$$ - vector of determination errors of discrete values of autocorrelation function. By the measurement equation, there defined is assessment of spectrum vector the components of which represent assessments of components of spectrum power density of the analysed signal, which are discretised as to resolution elements.

EFFECT: improving spectrum analysis accuracy, eliminating spectrum distortions due to effect of power leakage to neighbouring frequency areas and reducing time required for spectrum analysis.