Aperiodic And Odd Periodic Complementary Squence Even Set Theory Research

Synchronous CDMA communication system is to the requirement of the spreadspectrum address code used within the scope of the synchronous error (near the zero delay)with ideal correlation properties. The stand or fall of spread spectrum sequence correlationproperties to a great extent determines the size of the interference in CDMA system, whichdirectly affect the performance of the system and the size of the system capacity.Therefore, have good correlation of spread spectrum sequence design is one of the coresubject of CDMA technology. Complementary sequence which is to satisfy suchrequirements of the sequence, is the best new research direction of discrete signal theory.This paper applies to spread spectrum sequence construction method of quasisynchronous CDMA system that has carried on the theoretical research. Specific to thebinary complementary sequence pair, zero correlation zone aperiodic complementarysequence pair set, the structure of the odd periodic complementary sequence even setproblem is studied.First, to study the method of binary complementary sequence pair, according to thenature of the binary complementary sequence pair in the known binary complementarysequence pair is constructed on the basis of a lot of the same length equivalentaccidentally complementary sequences, proved and process; Using the method ofmathematical formula and interweave, on the basis of the known binary complementarysequence pair constructed a large number of different length of complementary sequenceaccidentally, theory proves the rationality of the structure of the proposed method.Second, study the zero correlation zone aperiodic accidentally set of two complemen--tary sequence constructor, The recursive structure method, orthogonal matrix andorthogonal matrix by crone accidentally set multiple new orthogonal matrix is constructed,with the order even with the new orthogonal matrix orthogonal matrix accidentally setrecursive operations, I get the new matrix. Matrix mixed method, using the recursivestructure of orthogonal matrix accidentally set as the initial sequence accidentally set, themixed method is adopted to construct a new characteristic to completelycomplementarities of zero correlation zone aperiodic accidentally set complementary sequence.Finally, studied the structure of the odd periodic complementary sequence even setmethod, using the known binary complementary sequence pair set length of the cycle inthe nature of the equivalent transform and other transform way, get the same length anddifferent length of the cycle of binary complementary sequence pair set.