Research On Zone Correlation Zone Sequence Pairs Set And Consrtuction

The concept of zero correlation zone (ZCZ) satisfies the requirements of accuratesynchronization CDMA communication system among spreading sequences，at the sametime provides theoretical support for constructing more spectrum sequence meetingneeds.The ZCZ sequences based on concept of ZCZ have good correlation performancewithin a certain delay.ZCZ sequences with good performance can reduce or eveneliminate multiple path interference and multiple access interference (MAI).Zonecorrelation zone(ZCZ) sequence pair,which is further expansion of spreadingsequence,can provide more number of address code.As the basic theory of ZCZsequence starting spot,further research based on existing results is given in thisarticle.The article reads as follow:firstly, two class ternary sequence pairs sets are constructed. The two class ZCZsequence pairs set are based on the initial ZCZ sequence pairs set(based on ternaryperfect sequence pair and orthogonal matrix pairs (binary or ternary)), the performanceparameter of sequence pairs set can achieve the theoretical bounds. Based on interleavingmethod, a class ZCZ sequence pairs set is presented by multiple iterations.. Anothermethod extends the constructed ZCZ sequence pairs set by multiplying with unequalvectors after shifting.Secondly, another construction of ZCZ sequence pairs set is presented.Based onorthogonal matrix pairs, the method gives a long period and amount of ZCZ sequencepairs set by the way of adding zeros and recursive.Along with the recursive numberincreasing,the period,the number and the length of sequence pairs grow as exponential.Finally，Based on orthogonal complementary sequence pairs set and orthogonalmatrix pairs,new orthogonal complementary sequence pairs set and ZCZ complementarysequence pairs set,which have more number than original,are presented.