皮皮学，免费搜题
登录
搜题
【多选题】
比较2ASK系统的解调与相干解调,以下描述正确的是( )。A.
相干解调比解调容易设置最佳判决门限电平
B.
最佳判决门限时，输入信噪比相同，相干解调的误码率小于包络解调的误码率
C.
在相同的大信噪比下，2ASK系统相干解调时的误码率总是高于解调时的误码率
D.
当系统误码率相同时，相干解调比解调对信号的输入信噪比要求低
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Some day, I want to visit the Tian'anmen _____ (广场).
【简答题】习俗,惯例,会议 n.
【简答题】Listen to a passage and choose the best answer from the four choices provided for each question. Words and expressions Gricean Maxims 格莱斯定律 convention /k ə n ˈ ven ʃə n/ n. 习俗,惯例 assumption / əˈ s ʌ...
【单选题】I want to be a volunteer some day. I feel _____ is my duty to help others.
A.
this
B.
that
C.
them
D.
it
【单选题】—_________ foreigners visit Sun Island every year. —Oh, I also want to visit it some day. [ ]
A.
Thousands of
B.
Two thousands
C.
Two thousand of
D.
Two thousands of
【简答题】convention n. behavior and attitudes that most people in society think are normal and right 习俗;惯例 让孩子们一起玩耍会教会他们社会习俗,比如如何与人分享。 译:___________________________ ______________________________________ 按照惯例,...
【简答题】n. 大会,公约;惯例,习俗
【简答题】阅读理解。 Some children want to be writers some day. They mean (意思是) that they want to write stories or books for people to read. That's good! It's good to write something for people to read! But they sho...
【简答题】0205P59Z 旋转式货架的特点?
相关题目：