时域插入的导频由于不和调制信号同时传送而没有相互干扰,故一般都直接选择 ω c 作为导频频率,直接用 ω c 窄带滤波器即可提取载频信号。
A.
正确
B.
错误
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】The Romantic period in the American literary history covers the time between the end of the ______century to the outbreak of the______. It started with the publication of Irving s______and ended with ...
【单选题】The steam engine opened the mechanical age, and it reached its peak with the discovery of nuclear fission and nuclear fusion, which______the energy producing processes of a star.