适用于配网节点接入的灾备跳频通信系统

Frequency Hopping Communication Systems for Access of Distribution Network Nodes Under Disaster Recovery

摘要:

在自然灾害、恶意攻击或意外故障等不可预见的情况下，配电网往往会受其影响导致节点通信发生故障，因此具有容灾备份的通信网络必不可少。为了保障灾害条件下配电网节点的顺利通信，提出了一种适用于灾害条件下的跳频通信系统，该系统采用两级跳频系统结合的方式来保证配电网节点通信网络接入的可靠性；然后，采用迹函数的方法设计了满足该系统的两级跳频序列族，并验证了该跳频序列族的两级汉明相关特性，主用跳频序列族的汉明相关特性满足理想的汉明相关值特性，而备用序列族的汉明相关特性虽然稍高于主用跳频序列族的相关特性，但是仍然能够达到一个很低的值；最后，将主备用跳频序列族用于信道传输中进行仿真分析。结果表明，该序列族的误码率特性优于传统的低碰撞跳频序列族。通过分析可知，该新型跳频通信系统适用于灾害条件下的配电网节点接入，能够保障信息传输的可靠性。

Abstract:

In unforeseeable situations such as natural disasters, malicious attacks or unexpected failures, distribution networks are often affected by these disasters, leading to communication failures at their node, so a communication network with disaster recovery backup is essential. In order to ensure the smooth communication of distribution network nodes under disaster conditions, a frequency hopping communication system suitable for disaster conditions is proposed. This system adopts a combination of two-level frequency hopping systems to ensure the reliability of communication network access for distribution network nodes. Then, a two-level hopping sequence set that satisfies the system is designed using the trace function method, and the two-level Hamming correlation characteristics of the frequency hopping sequence set are verified. The Hamming correlation characteristics of main frequency hopping sequence set satisfy the ideal Hamming correlation value characteristics, while the Hamming correlation characteristics of backup sequence set, although slightly higher than those of main frequency hopping sequence set, can still reach a very low value. Finally, the main and backup frequency hopping sequence sets are used for simulation analysis in channel transmission, and the results show that the characteristics of bit errors of this sequence set are superior to traditional low-hit-zone frequency hopping sequence sets. Through analysis, it can be concluded that the proposed frequency hopping communication system is suitable for the access of distribution network nodes under disaster conditions, and can ensure the reliability of information transmission.