This dissertation focuses on key technology of software antenna. The main work as followings: This dissertation investigated about the radiotransmission model.
本文围绕软件天线关键技术进行研究，主要工作如下：首先研究了无线电传播模型。
2
With the invention of the radiotechnology, the radio news transmission in TV technology greatly enhance the timeliness, appear in the absolute, TV after leading position.
随着无线电技术的发明，广播在新闻传递方面时效性大大增强，电视技术出现后，电视处于绝对的领先位置。
3
It was only after the advent of microwave communication technology that it became possible for radiotechnology to be applied in full scale to the field where cable transmission had been dominant.