摘要
对FH-GMSK(Frequency Hopping-Gaussian Filtered Minimum Shift Keying)通信系统进行了研究,分析了GMSK调制的基本原理,给出了该跳频通信系统的模型。分析了对FH-GMSK通信系统实施跟踪干扰采用的调制方式,在Simulink平台下搭建了FH-GMSK通信系统和各种调制模式下跟踪干扰模块。分析了不同BT值下该系统的误码率性能。仿真结果表明,随着信噪比的增加,未受跟踪干扰时,误码率逐渐降低,在跟踪干扰下误码率有一定的下降,但始终保持在0.3以上;采用不同调制的跟踪干扰中,2FSK调制干扰效果最佳,MSK和GMSK调制次之,FM调制效果最差。
The FH - GMSK communication system is researched, the basic principle of GMSK modulation is analysed and the model of the FH - GMSK communication system is given. The modulation mode of follower jamming to the FH- GMSK communication system is analysed, and the FH - GMSK communication system and follower jamming module in different modulations are simulated by Simulink. The bit error rate（BER） under the different BT is given. The simulation results show that, with the increase of SNR, the BER is gradually decreased when the follower jamming does not exist. On the contrary, when the follower jamming is completed, the BER is decreased but kept above 0.3. When the follower jamming adopts different modulations, the 2FSK modulation provides the most effective hedge, the MSK and GMSK modulation are placed in the middle, the FM modulation performs worse.
出处
《电讯技术》
北大核心
2011年第10期46-50,共5页
Telecommunication Engineering
