[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fpDYAA47ub1neIXRaiB8RF1oNudD2VXWMVFmHSS8ZSww":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":11,"question":18,"related":19,"source":29,"type":43},[],"2025-03-13 20:28:34",179086548,[8,9,10],"正确","错误","不确定",{"count":12,"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},12,"f855e61c0b50d3298e2bde4a63b84910","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F97d0dd6c60e3625d8049a982e913325d.jpg","通信原理","815c4fdcad22480d803e990a4969ceff","章节测验","数字基带信号的功率谱密度分为连续谱和离散谱,由连续谱可以确定信号的带宽, 由离散谱可以确定信号的位定时分量,这一说法是( )",[20,31,40,44,50,58,63,68,76,84],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],179086544,[24,25,26,27],"最佳抽样时刻是"眼睛"张开最大的时刻","定时误差灵敏度是眼图斜边的斜率,斜率越小,对位定时误差越敏感","眼图中央的横轴位置对应于判决门限电平","眼图的"眼睛"张开越大,且眼图越端正,表示码间串扰越小","下列关于眼图的说法正确的是( )","v1",1,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],179086546,[35,36,37,38],"二进制随机脉冲序列的功率谱可能包含连续谱和离散谱","连续谱总是存在的","离散谱总是存在的","根据离散谱可以确定随机序列是否含有直流分量和定时分量","关于二进制随机脉冲序列的功率谱密度说法正确的是( )",{"answer":41,"createTime":5,"id":6,"options":42,"question":18,"source":29,"type":43},[],[8,9,10],0,{"answer":45,"createTime":5,"id":46,"options":47,"question":49,"source":29,"type":43},[],179086550,[48,36,37],"连续谱和离散谱总是存在的","数字基带信号的功率谱密度分为连续谱和离散谱,下列说法正确的是( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":57,"source":29,"type":43},[],179086552,[54,55,56],"带宽相同","都不存在位定时分量","都存在直流分量","1等概条件下,关于单极性不归零码和50%占空比的归零码,下列说法正确的是( )",{"answer":59,"createTime":5,"id":60,"options":61,"question":62,"source":29,"type":43},[],179086554,[8,9,10],"1等概条件下,单、双极性不归零码的带宽相同,这一说法是( )",{"answer":64,"createTime":5,"id":65,"options":66,"question":67,"source":29,"type":43},[],179086555,[8,9,10],"数字基带系统的传输总特性是由发送滤波器和接收滤波器组成的,这一说法是( )",{"answer":69,"createTime":5,"id":70,"options":71,"question":75,"source":29,"type":43},[],179086556,[72,73,74],"最高","最低","两者都不是","奈奎斯特速率是无码间串扰传输时的( )波特率",{"answer":77,"createTime":5,"id":78,"options":79,"question":83,"source":29,"type":43},[],179086557,[80,81,82],"1","1.5","2","无码间串扰传输时,基带系统的最高频带利用率是( )B\u002FHz",{"answer":85,"createTime":5,"id":86,"options":87,"question":88,"source":29,"type":43},[],179086558,[8,9,10],"在数值上,奈奎斯特速率是奈奎斯特带宽的2倍,这一说法是( )"]