基于System View的QAM和OFDM调制性能研究

摘要

针对无线通信和移动通信中的信道干扰和码间干扰等问题，对正交幅度调制（QAM）和OFDM的调制性能进行了研究，首先，在System View仿真环境下，搭建一个通信系统，然后分别将两种调制方式应用其中，最后得到OFDM与QAM的比特误码率（BER）性能曲线。仿真结果表明，OFDM具有良好的误比特率性能，而且在相同的信噪比（SNR）下OFDM的BER性能比QAM更优越。%For channel interference and intersymbol interference problems in the wireless communication and mobile com-munication,the quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexing (OFDM) mod-ulation performance were studied in this paper.Firstly, a communications system was built in System View simulation environment, and then two modulation methods were applied in this system. Finally, the bit error rate (BER) perfor-mance curves of OFDM and QAM are got. The results indicate that OFDM has good BER performance, but the BER performance of OFDM is more superior than QAM at the same signal noise ratio (SNR).