The Design Of Zcz Sequence Set

In the quasi-synchronous CDMA system, the request to adopt the spreading sequence is that the sequence should have perfect correlation properties in the synchronous error (near the zero time delay), the zero-correlation zone (ZCZ) sequence is just fit for the need and have perfect correlation properties.ZCZ sequence extend the exist space for the best signal, therefore, to research the ZCZ sequence deeply has the extremely vital significance in the theory and application. The zero-correlation zone(Z-) complementary sequence set solve the limitations on the length and the number of complementary set and complementary set mate, so the theoretical research of Z-complementary sequence set is also very important.After summarizing and comparing the known design methods of ZCZ sequence pairs set,Z-complementary sequence set and ZCZ sequence set, the paper makes a series study for the construction of the three kinds of set to extend the exist space of the three kinds of set,.The main work is just as following:(1) The basic concepts of sequence pair, especially the ZCZ sequence pair, and their correlation properties are discussed. The applications of the sequence pair in the signal process and communication system are also introduced.(2) the properties of a kind of special sequence pairs was studied, a new class of ZCZ sequence pair set was constructed by using the kind of special sequence pairs as the initialization matrix through the recursive method. we also give some examples.(3) A new class of Z-complementary sequence set was constructed which using the Inter-Group Complementary(IGC) sequence set or Z-complementary sequence set as the initialization matrix through the recursive method. We also give some examples.(4) A new class of ZCZ sequence set and mutually orthogonal ZCZ sequence set was constructed by using the Inter-Group Complementary(IGC) sequence set or Z-complementary sequence set as the initialization matrix through the recursive method. At last, the paper introduces two applications of the ZCZ sequence in the practice system.