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。
To the 90's, a complex digital modulation with the rapid development of communication technology, testing signal mainly based digital modulation signals.
到了90年代，复杂的数字调制加上通信技术的迅猛发展，测试信号主要以数字调制信号为主。
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