北航信号与系统实验五离散时间系统频响

单位样值响应Р激励X[I] 响应h[I]Р1Рh[0]=0.000000Р0Рh[1]=1.000000Р0Рh[2]=1.300000Р0Рh[3]=1.290000Р0Рh[4]=1.157000Р0Рh[5]=0.988100Р0Рh[6]=0.821730Р0Рh[7]=0.673009Р0Рh[8]=0.546220Р0Рh[9]=0.440882Р0Рh[10]=0.354659Р5.2幅频特性和相频特性Р0Р8.571599Р0Р0.314159Р6.11825Р-1.36451Р0.628318Р2.137043Р-2.11403Р0.942477Р1.773064Р-2.25231Р1.256636Р0.742628Р-2.73559Р1.570795Р0.90273Р-2.5992Р1.884954Р0.375449Р-3.02173Р2.199113Р0.630436Р-2.8331Р2.513272Р0.246655Р-3.1356Р2.827431Р0.5384Р-3.04037Р3.14159Р0.212383Р3.14157Р3.455749Р0.5384Р3.040387Р3.769908Р0.246651Р3.135569Р4.084067Р0.630437Р2.833116Р4.398226Р0.375441Р3.021712Р4.712385Р0.90273Р2.599214Р5.026544Р0.742614Р2.735575Р5.340703Р1.773058Р2.252323Р5.654862Р2.137005Р2.11403Р5.969021Р6.118177Р1.36453Р幅频特性:Р相频特性:Р虽然离散系统的信号是离散的,但是其频谱图是连续的,并且0时对应的是低频,Pi时对应的为高频。根据幅频图可以看出该系统为低通滤波器