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Present the SSB modulation and some characters of HF communication.
分析短波通信的特点，了解单边带调制的相关特性；
To increase the effectively transmitted bandwidth, digital multiplex channel Weaver complex modulation is employed to implement SSB modulation.
为了提高载波机的有效传输带宽，可采用多路数字韦瓦复调制的原理来实现载波机的单边带调制。
The purpose of quadrature modulation is to generate the SSB RF exciting pulse that avoids exciting it's mirror slice.
正交调制的目的是产生单边带RF激发脉冲，以避免激发镜像层面。
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