HotZ-雷达系统(第一章)波形模糊函数课件.ppt

1、雷达雷达依赖天线向空间依赖天线向空间辐射辐射电磁波，并电磁波，并接收接收由目标散由目标散射的电磁波，以确定目标的存在。射的电磁波，以确定目标的存在。雷达雷达发射的电磁波具有一定的形式：连续波或脉冲发射的电磁波具有一定的形式：连续波或脉冲串，单频的或调频、调幅或相位编码的串，单频的或调频、调幅或相位编码的()u t2()djf tu te00 rv2rdvf()u t2()djf tu t e2f222()()djf tfu tu t edt222*2()2Re()()djf tfu tdtu t u t edt2*()()()djf tdfu t u t edt2()dff ()df22()(

2、0)dddffdfA()u t()U f*()()()()u t u t dtU f Uf df2()()djf tdu t eU ff F()df()U f*()()()ddfU f Uff dfdf()()u tU f*()()()()()()ddfU f Uff dfu t u tdt 2()()dfu t F422()()ddfdu tdfAu tdf422()()U fdfAU fdf224()1()defu tdtTAu tdtdfA()df()feT2()u t0022dfveA ccDff T距离距离-速度模数速度模数函数函数与与其联合其联合分辨力分辨力00df()u t2()

3、djf tu te222*,2()2Re()()ddjf tfu tdtu t u tdt距离距离-速度模数函数与速度模数函数与其联合其联合分辨力分辨力2*(,)()()djf tdfu t u tdt()u t(,)df 2,df22(,)(0,0)df 距离距离-速度模数函数与速度模数函数与其联合其联合分辨力分辨力2(,)df 2(,)df 距离距离-速度模数函数与速度模数函数与其联合其联合分辨力分辨力2(,)df dfOdfBAC2(0,0)1A2(,0)0B 2(,)0dCf ABC距离距离-速度模数函数与速度模数函数与其联合其联合分辨力分辨力dfABC,df,df,dfD距离距离-速

4、度模数函数与速度模数函数与其联合其联合分辨力分辨力2,2,(,)(0,0)dddfddfffd dfA df2(,)df df,1dfA距离距离-速度模数函数与速度模数函数与其联合其联合分辨力分辨力22(,)(,)ddff 22(,)(0,0)df 2(,)df 0,0df距离距离-速度模数函数与速度模数函数与其联合其联合分辨力分辨力222(,)(0,0)ddfd dfE df距离距离-速度模数函数与速度模数函数与其联合其联合分辨力分辨力22()(,)jbtjbdbu t eef 22()(,)djbfjbfddbfU f eef 1()(,)dfu at 1()(,)dU affdf距离距离

5、-速度模数函数与速度模数函数与其联合其联合分辨力分辨力*(,0)()()u t u tdt 22(0,)()djf tdfu tedt1,0()0,tTu t 其余 *(,)()()ddbjtjtdau t u tdtedt ab0T0TT0T()0(2)()1(,)sin(2)()2dddjTTjtdddjTdeedtjTe 0T(2)()(,)sin(2)()2ddddjTjTjtdddjTdeeedtjTe T(,)0d (2)()sin(2)(),T ddjTddTe sin(2)(),T dddT ,T T sin(2)(0,)2dddTTTdTd2TT df,v R2,0()0,j

6、btetTu t 其余 brad/s22()(,)jbtjbdbu t eef 21(,)(,2)jbddeb 2(2)()222sin(),T djbTjbdddbeeTb T2 2bTbT 22sin(),T dddbTb sin(),T b TTb T sin(2)(0,)2dddTTT50T0.0031Hz/bT1T dd 2 ddbbbf 110()()Nrnu tu tnT11,()0,pttu t其余 1(1)sin()sin()(,)sinNdprdrdkNddrftkTfNk Tfff T rTd1(1)(,0)11NrpkNpkTkNttN sinsin(0,)sind pdrdddrf tf NTfff TrT1rT0,0dfpt1rNTdfrT1rTpt1pt110()()Nrnnu tu tnTtnnt2nrtT,dfd001111()()(1),0nNNjtjjtnnnntu t eUtneetN()nUt1n1()(1)11njnnnu tcUtne 或2*11 (,)()()dNNjf tdnmfu t u tdt 1eWeW1eTeTdfeeTW11eeTW d