From now, only the INTELSAT did the 16QAM experiments in space communication, and their 16QAM is made by conventional method, and its data rate is not high.

• 国际上只有INTELSAT组织在卫星通信中进行过16QAM数传试验,他们采用的也是常规的线性放大16QAM调制技术,并且数传速率不高。