【雷达通信】基于matla模拟雷达定位

function vel = MTIcalcVelocityFromFourier(energyInFreqRangeCells,ind,freqRes,intermidateFreq,PRI) % vel = MTIcalcVelocityFromFourier(energyInFreqRangeCells,ind,freqRes,intermidateFreq,PRI) [range freq] = ind2sub(size(energyInFreqRangeCells).*[1 0.5],ind); if freq < freqRes & freq > 1 sig = energyInFreqRangeCells(range, freq-1:freq+1); freq = parbolFit( (freq-freqRes/2-2:freq-freqRes/2)/freqRes/PRI,sig ); if abs(freq) < 1 freq = 0; end vel = 3e8*freq/(2*intermidateFreq); else vel = 3e8*(freq-freqRes/2)/(2*intermidateFreq); end function x0 = parbolFit(x,y) c = y(2); a = (y(1)+y(3)-2*c)*0.5; b = y(3)-c-a; peak = -b/(2*a); x0 = x(2)+peak*(x(3)-x(2));