CAJ | 학술논문

QAM是一种频谱利用率很高的调制方式，相对于传统的QPSK调制方式，更适应于卫星通信对高速数据传输的需求。为深入研究QAM调制原理，本文利用Simulink工具搭建了16QAM信号基带传输模型，并通过观察仿真出的信号频谱、星座图、眼图、传输误比特率等信息，对16QAM调制解调技术的基带传输特性进行了进一步的研究。最后指出了16 QAM调制技术在卫星通信应用中的优势及不足。
QAM시일충빈보이용솔흔고적조제방식，상대우전통적QPSK조제방식，경괄응우위성통신대고속수거전수적수구。위심입연구QAM조제원리，본문이용Simulink공구탑건료16QAM신호기대전수모형，병통과관찰방진출적신호빈보、성좌도、안도、전수오비특솔등신식，대16QAM조제해조기술적기대전수특성진행료진일보적연구。최후지출료16 QAM조제기술재위성통신응용중적우세급불족。
As its high spectral efficiency , the QAM is more suitable for the demand of high speed data transmission in satellite communication than the traditional modulation of QPSK .In order to do further study on the 16QAM, this paper builds a baseband transmission system model of 16QAM with Simulink.By watching the simulation result of spectrum , constellation diagram, eye diagram and symbols error rate, a further research is made on the baseband transmission characteristics of 16QAM modulation technology .At last, the advantages and disadvantages of 16QAM in the application of satellite communication is pointed out .