本文主要研究对抗环境下仿真,无人机自组网典型场景的构建,以及对抗环境下关于路由协议性能方面的内容,以场景构建的基础作为模型的基础构建内容,选择适当环境下最佳路由协议,建立实战仿真场景,对相关节点的仿真模型进行系统研究,以便提升自我认知能力,并对比不同协议中的不同功能特性.

In this paper, the electromagnetic characteristics of the reported miniaturized bandpass filter (BPF) in reference are investigated deeply, and then a planar compact diplexer centred at 1.86/2.16 GHz is designed by using a T-junction to connect the reported BPFs. For verification, the designed diplexer are fabricated and measured. The measured and simulated results of the diplexer are in good agreement with each other, showing that the measured 3-dB bandwidth for the two passbands are 6.45% (1.79-1.91 GHz) at 1.86 GHz and 6.94% (2.08-2.23 GHz) at 2.16 GHz with return losses better than 20 dB. Moreover, the insertion losses of the two passbands are less than 0.7 and 0.9 dB, and the isolations are higher than 48 and 36 dB, respectively. Besides, compared with the diplexers reported in recent references, this one has more superior performances.

Radio communication technology based on frequency-hopping and modulation-hopping is a novel effective LPI(Low Probability of Interception) communication technology.In nowadays,the technology of interception and identification of frequency-hopping signal is relatively mature.Considering this situation and in order to guarantee the secure transmission of information,an approach is put forward to combine frequency-hopping with modulation hopping.The whole software radio implementation scheme of LPI communication system based on frequency-hopping and modulation-hopping is built up to reduce the probability of being intercepted and identificated on the system level.Partition method of modulation constellation set and synchronization algorithm with predecessor sequence are proposed as critical technologies.The anti-interception capability of the system is improved.Finally the future development and possible application of the technology is prospected.