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 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.
distribution networkdisaster recovery communicationfrequency hopping communicationfrequency hopping sequence
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