SimpliciTI网络频率捷变机制的研究

Research on Frequency Agility Mechanism in SimpliciTI Network

针对SimpliciTI网络存在着跳频盲目性和通信初始信道易受到干扰的问题,引入FA帧模型,提出一种改进的频率捷变方案。该方案根据FA帧的同步码信息,采用时钟同步法构建网络的主从同步体系;通过SimpliciTI信道模型计算出的RSSI阀值,使频率捷变次数相对降低,进而提高网络的抗干扰能力和频谱利用率。研究结果表明,在40个通信节点的网络规模下,FA帧中同步码的错误检测概率与假同步概率均仅为0.13%,网络同步时钟的误差达到1.2ms,改进算法的频道切换次数平均降低3次。

A developed frequency agility（FA）method with FA frame model was proposed,intended to address the problem of the frequency-hopping blindness and the initial communication channel instability occurring in existing SimpliciTI protocol.The newly-elaborated method utilizes clock synchronization approach to establish master-slave synchronization network according to synchronous code of FA frame.Meanwhile,on the basis of RSSI threshold calculated by SimpliciTI channel model,the number of frequency agility is relatively reduced,thus the network anti-jamming ability and frequency spectrum efficiency are obviously improved.The experiment shows that the probability of error detection and the probability of false synchronization are only 0.13%.For the meantime,the synchronous clock error could be reduced to 1.2ms and the frequency of channel-switching averagely reduces 3 times.