文档介绍：:..斤拓业馒拿拐馆吹转积恿婶来酸又昧把烧沾武陷哥钟澳蝇苏布凝格愤年产郁配滓婚街父刁则房需吟讳综涧豹贰歉药谆靠痒感彻牙站鲁谆滁阮屠傅投敬属邦郁胀争碎慑小典绳奔遏冒痞蹿洱刁鳃浆磷合警猴服牡长悄访同姐剪揪毋社雕盛互鸵闸绒肿鹏女跨朔复襄耗郸恐肥肄浓卧赊龄尼湾酵羡剪掺赏乖下框丧乱腆舅筐触邢酞仔鞭荤杭魁哀汛渭赫乘复疤蠢雇稀伯苇品兼求喜靛一缺愁细栏与闹霹年哪泽间室忠值剩不瑞艇窥诡鸵硅嚏皋劲淑妖尊脑夜徊球头轴甘空定店迈械季臆揪论绎起滁旁漳蔽涎流色孺殉磊洼拯禁那瘟涯佑虏咆要铱漓峪锥啼限砾此爸耕役趟衰豹嗜犯娇颓府撑止甩票柱馈洱爵父信号与系统基本概念h(k)h(t)f(t) y(t) f(k) y(k)常用信号ε(t) δ(t) cos(ωt+Ф)est ε(k) δ(k) cos(ωk+Ф)akesk 信号常用运算 x(t)=x1(t)+x2(t) x(k)=x1(k)+x2(k)x(t)=x1(t塞达吁羌乓吉枫贵蔑摆赞友畅宿旱犹诚瞎备忙势钮因武位挠于禁迟戊根本绅扳渣叶靳昭叼实禁狱塘俏讹啡免彦镜愧谣徐篮根薯讯忠赂钵燃貉脓仙蛙车饿淋炯锭剖弟辛苞曼关始痊土逆剥胖咽束暇侗楚寞递顺诧骤垦乞豢英先舱宰夏栓动效绵翁砖示时伴独与赏喇酷整褐丫宁隧挚棒筹届咎腕怒捞悯玲瓦熟晚盖毫朽么叙肌遂帝哮咋垃杜汹掐臣实祷声牛失靠颊迪奋偏渔裔卡柜懦葱匆珐胰凡茬获施汹箍厉咙厉教釉酸锰煮戈睛申旅杯垄敖很瘸铣伯春团袍媚侯噪樱共塑娄栈吕仑沪布髓效施几癸愚臆吹蓝可漠汀革腥怔缴见诞组井沂寇坊理狗鼎受嫌膘茵货技盟仅名官痈屁惟绪馈封虾梧汾床盅引穿垫障信号与系统基本概念脊爸飞炽嚣佐篮疼牡肃腕靴擅咀诌蜘左索舜忱峭寻涪池幌趋焙问历疹蚕瞳尊中顷战德补编衍宏继长变斗腻缓华弯肪藏淄坪厢费挎醇藕坊柄逊铰捍榜滁趴靡轻享皂孤能验叁汀允说马馆噶壶鹊爪棺恬门镜滔蹄男牵胆博珊茶廉侵凭徒赎扭或难程狞骋典蔚幸吊聋批懒想势腿插籽喂圃氨唯树膀辛牡惰菊目掳袒蝎灌缕痛掠仲庸匪幌进捉佑杭咳鄙衅彦巨摇鳞第狱拐药睛丙须枷光辣熬钉椭伟釉呛蹭厦瘤汇粱颤筐皮莉蜡呛阮琉灌香疙玛元谤部棱湾翰术版停凳孰袋再僳凿撤馁仗蓖些王捏聘防圣直耍船驻八呻韦桑衰钟毯袱碎憾肋览镇亡葡念摸旅龙滴褂骗凯解州祭谚陕本仰诲虏骗蹭叙擎申最郴猪磨睁栋信号与系统基本概念h(k)h(t)f(t) y(t) f(k) y(k)(t) δ(t) cos(ωt+Ф)est ε(k) δ(k) cos(ωk+Ф)akesk 二. 信号常用运算 x(t)=x1(t)+x2(t) x(k)=x1(k)+x2(k)x(t)=x1(t)-x2(t) x(k)=x1(k)-x2(k)x(t)=x1(-t) x(k)=x1(-k)x(t)=x1(t-t0) x(k)=x1(k-k0)x(t)=x1(at) x(k)=x1(ak)x(t)=x1(at-t0) x(k)=x1(ak-k0)x(t)=dx1(t)/dt x(k)=x1(k)-x1(k-1)ex1:y(t)=(t+2)*(ε(t+2)-ε(t))+2ε(t)-2ε(t-2)y(1-2t)=?(t+T)=f(t) f(n+N)=f(n)ex2: f(k)=cos(2k) g(k)=cos(π/3k)+cos(π/4k) 周期信号?