Abstract
The designation of Frequency Hopping (FH) sequences is the crucial factor affecting the quality of FH communication in asynchronous network (AN). According to the requirement of FH communication in AN, some definitions are put forward, the frequency similarity, the sequence similarity, as well as the general similarity, and then the similarity matrix of available FH sequences is constructed. The method of hierarchy clustering analysis (HCA) is introduced to mine the clustering structure of FH sequences in characteristic space. Based on the principle that the similarity of suitable FH sequences used in different networks should be the least, the optimized sequences can be designated from different clusters finally.
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