[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fbmLpj1zH27a69sNnq7BbBKBRuMpCz-8XtlHKMteZOMc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":34},[],"2023-05-08 10:00:02",35606844,[8,9,10,11],"幅度","频率","绝对相位","相对相位",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000006995","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F32f536fd66e217ecefecad758546ec9b.png","通信原理（黑龙江联盟）","22901377","通信原理（黑龙江联盟）教程考试","PSK是利用载波的( )来表示符号进行信息传输",[20,31,35,43,52,57,62,71,76,81],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],35606839,[24,25,26,27],"误信率","接收信噪比","误码率","频带利用率","数字通信系统的可靠性可以用( )来衡量","v2",1,{"answer":32,"createTime":5,"id":6,"options":33,"question":18,"source":29,"type":34},[],[8,9,10,11],0,{"answer":36,"createTime":5,"id":37,"options":38,"question":41,"source":29,"type":42},[],35606850,[39,40],"对","错","第四代移动通信的交换方式为电路交换与分组交换并存.( )",3,{"answer":44,"createTime":5,"id":45,"options":46,"question":51,"source":29,"type":34},[],35606852,[47,48,49,50],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0c82898858f8bc7c547b935b9645889e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7cc1acf076ac380612b536ce21ca91c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F98864ef204f6183741a2a97416759fcc.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0c6a5ab0761ea5872c694aa319bb5073.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F53cd234fa4675d0501041aef2b385ab7.png\">",{"answer":53,"createTime":5,"id":54,"options":55,"question":56,"source":29,"type":42},[],35606853,[39,40],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F66d6881edeb50453cb4240ca0d7bee65.png\">",{"answer":58,"createTime":5,"id":59,"options":60,"question":61,"source":29,"type":42},[],35606858,[39,40],"MSK和2FSK区别只在于前者的| f2-f1 |更小.( )",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":29,"type":34},[],35606867,[66,67,68,69],"时间和幅值的离散","幅值上的离散","时间上的离散","频谱上的离散","通过抽样可以使模拟信号实现( )",{"answer":72,"createTime":5,"id":73,"options":74,"question":75,"source":29,"type":42},[],35606874,[39,40],"人类进入现代通信时代的标志是约翰&middot;惠勒在1983年提出&quot;It from bit&quot;的参与宇宙观点来说明量子信息对宇宙的决定.( )",{"answer":77,"createTime":5,"id":78,"options":79,"question":80,"source":29,"type":42},[],35606878,[39,40],"分集接收技术主要是为了解决随参信道中的快衰落影响.( )",{"answer":82,"createTime":5,"id":83,"options":84,"question":85,"source":29,"type":42},[],35606879,[39,40],"DSB信号调制效率比AM信号高,因为DSB信号中不存在载波分量,全部功率都用于信息传输.( )"]