对利用多个编码发射机在轨测量星载SAR接收天线二维方向图的技术进行了研究。
This paper describes a new method of antenna reception pattern measurement for spaceborne SAR using encoding transmitters.
首先研究基本的发射机，包括卷积编码、交织、扰码、沃尔什调制、正交扩频以及基带滤波。
Firstly the basic transmitter, including convolutional encoding, interleaving, scrambling, Walsh modulation, quadrature spreading and baseband filtering was studied.
数字地面电视发射机有两大技术难点：一是与制式有关的信道编码调制技术；
There are two technique problems for Terrestrial digital TV transmitter: one is the channel coding modulation technique whch is dependent of TV system;
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