摘要
针对DVB-S2系统采用的幅度相位键控(APSK)等高阶调制方式,分析了APSK信号的调制与解调原理,推导了16APSK信号的误比特率(BER)。仿真讨论了基于DVB-S2系统APSK信号在受不同噪声调制干扰和数字调制信号干扰时的误比特率及干扰效果。结果表明:在低干信比(J/s)时数字调制干扰信号干扰效果更好。研究结果可为APSK信号的抗干扰性能研究提供参考。
The principles of APSK modulation and demodulation were analyzed for the high-order digital modulation in DVB-S2 system in this paper. The bit error rate （BER） for 16APSK was theoretically derived. The BER and effects of various noise modulation jamming and the digital modulation jamming for APSK based on DVB- $2 system were obtained through simulation. The simulation results were showed that the digital modulation jamming was efficient under the situation of low signal interference rate. The results could provide references to the study of anti-jamming.
出处
《上海航天》
2012年第5期67-72,共6页
Aerospace Shanghai
