METHOD FOR PULSE INTERFERENCE CONTROL BASED ON LOCALISATION THEREOF USING MIN-MAX THRESHOLD IN ADAPTIVE RADIO SIGNAL RECEIVING SYSTEMS Russian patent published in 2014 - IPC H04L1/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to adaptive filtering. For a received observation signal, which is an additive mixture of a useful signal, noise and pulse interference, localisation and reduction of the effect of the pulse interference is achieved by forming an observation signal envelope, breaking down said signal envelope into L/N units (L is the length of the original observation signal, N is the size of the unit, where L is a multiple of N), selecting the maximum value of the envelope at each unit and forming a first sequence therefrom; using the obtained first sequence to form units of length M (L/N being a multiple of M), selecting the minimum value in each unit and forming a second sequence therefrom; further, using a cubic interpolation technique to plot a curve, where the L/N·M of interpolation node points, spaced apart by M·N, used are values of the second sequence, and the boundary node points used are the first and last values of the second sequence; the obtained curve is used as an estimate of the envelope of the useful signal and noise for calculating a min-max threshold, which takes into account the pulse interference detection error probability; the calculated min-max threshold is used to determine the intervals of influence (indices of initial positions, durations) of pulse interference in the original observation signal; when processing the observation signal on the interval of influence of each pulse interference, stopping and determining the state of the algorithm for calculating weight coefficients of adaptive channel distortion correctors or adaptive antenna systems; at the end of the interval of influence of pulse interference, launching the algorithm for calculating weight coefficients of adaptive channel distortion correctors or adaptive antenna systems.

EFFECT: pulse interference control procedure based on localisation thereof using a min-max threshold, reducing the negative impact of pulse interference on adaptive radio signal receiving systems, thereby improving quality of reception.

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