The Research On The Bounds On The Hamming Correlations Of The Multiple-length Frequency-hopping Sequence Sets Of The Period And The Construction Of Multi-subset Frequency Hopping Sequence Sets

The frequency hopping sequence plays a very important role in the frequency hopping communication system,and the performance of the frequency hopping sequence directly affects the quality of the frequency hopping communication system.This article mainly studies two aspects.First,in order to improve the anti-interception performance of the frequency hopping sequence,the concept of the multiple-length frequency hopping sequence sets is proposed,and the theoretical bound of the multiple-length frequency hopping sequence sets has been studied in related aspects;Secondly,in order to solve the interference problem of the inter-cell communication system in the multi-cell environment,the construction method of the multiple-subset low-hit zone frequency hopping sequence set is studied.Firstly,the research is the periodic Hamming related theoretical bound of the multiplelength hopping sequence sets and the low/zero hit zone periodic Hamming related theoretical bound.The research is mainly divided into three parts.In the first part,we study the periodic Hamming related theoretic bound of multiple-length frequency-hopping sequence sets;In the second part,we study the periodic Hamming related theoretic bound of multiple-length frequency-hopping sequence sets in the low-hit zone;In the third part,we study the periodic Hamming related theoretic bound of multiple-length frequencyhopping sequence sets in the zero-hit zone.The Hamming related theoretical bound of multiple-length frequency hopping sequence sets has very important theoretical significance for the construction of multiple-length frequency hopping sequence sets.Secondly,based on the interleaving theory,a construction method for designing a multi-subset frequency hopping sequence sets with low hit zone with low inter-set crosscorrelation and a construction method for designing multi-subset frequency hopping sequence sets with low cross-correlation between sets with shift inequality are proposed.The sequence sets obtained by these two construction methods contains multiple subsets,and each subset is a low-hit zone frequency hopping sequence sets,and the sets have good cross-correlation between sets.The second construction method obtains that the sequences in the multiple-subset frequency hopping sequence sets in the low hit zone are not equivalent to each other.The length of the low hit zone corresponding to the subset of the multi-subset frequency hopping sequence sets obtained by the two construction methods can be flexibly selected under certain conditions.The low hit zone multi-subset frequency hopping sequence sets constructed by these two design methods can be applied in the frequency hopping communication system to reduce the interference of user communication between cells.