Research On Construction Of Zero Or Low Correlation Zone Sequence Pairs Set And No Hit Zone Frequency Hopping Sequence Set

Spread Spectrum Communication (SSC, Spread Spectrum Communication) systemis widely used nowadays, and to a large extent the quality-related characteristics ofSpread Spectrum sequence determines the performance of Spread SpectrumCommunication system.Based of the theory of spreading sequence design, on the onehand, the new development direction of the sequence design is low or zero correlationzone (ZCZ/LCZ) sequence pairs in recent years. On the other hand, the traditionalfrequency hopping sequence requirements Hamming correlation function is zero in anycase time delay. However, no hit zone(NHZ) hopping sequence is hopping sequencewhen Hamming correlation function is zero only in a certain of near zero time delay. Thiswill expand the number of frequency hopping sequence. Therefore ZCZ/LCZ sequencepair set and NHZ frequency hopping sequence set research has important applicationssignificance. This paper’s research focuses on construction methods and performanceZCZ/LCZ of sequence pairs set and NHZ frequency hopping sequence set.Firstly, based on a non-repetitive frequency hopping sequence, according to set theparameters and construct shift sequences, NHZ frequency hopping sequence isconstructed, which is more length by using interleave method.Secondly, the basic concept NHZ frequency hopping sequence set were analyzed,and based on a NHZ frequency hopping sequence using interleaving method andpermutation theory had obtained NHZ frequency hopping sequence sets which areincreased the length and no hit zone length. Sequence sets the parameters obtained bythis method can satisfy theorists, is a kind of near-optimal NHZ frequency hoppingsequence set.Thirdly, based on a NHZ frequency hopping sequence set and cyclically distinct,combined with interleaving operation, subsets of NHZ frequence hopping sequence setsis obtained, which are expansioned the number and length of sequence and the length ofno hit zone.Finally, based on the interleaving, an new method which construct ZCZ/LCZsequence pairs set is discussed by utilizing the interleaving technique.,Parameterselection flexible shift sequences, this method can be extended to obtain plurality of cyclically distinct ZCZ/LCZ sequence pairs set.