The Analyses On The Channel Adaptable Performance Of Spread Spectrum Communication And Telemetry Complex System

In this paper, based on the analysis of traditional spread spectrum complex system, the tamed-DS and concatenated sequence technology are introduced, three new complex systems are introduced. Trough the research of the performance the three new complex systems in different channels, the adaptation performance in different channels is gotten, which offer the theory basis to the application of complex systems.This paper introduces the principle and key technology of distance measurement by direct spread spectrum technology. Trough the analyses of contradiction and the abuse of traditional spread spectrum and distance measurement complex system, the tamed-DS and concatenated sequence technology are proposed and the new complex system is constructed. Above all, this paper demonstrates and simulates the autocorrelation and cross-correlation property. Then complex system based on m_W sequence is built up and the adaptation performance of different channels is simulated. The paper analyses the cross-correlation property of same order Walsh sequence. The cross-correlation property of m_W is seriously influenced by the precision of synchronization, the changing of the m_W complex system is necessary.Then the theory of the complete complementary sequence and the modified method is proposed. The cross-correlation property of the complete complementary sequences and modified complete complementary sequences is validated. Based on this, the multiplex system based on the complete complementary sequences and modified complete complementary sequences is built up and simulated in different channels for the property of adaptation. This multiplex system applied many complete complementary sequences as the inside sequences and the m sequences (or Gold sequences) is used as exterior sequences. At last, for the same complex system in different channels and the different systems in the same channel are simulated. The channel adaptation property of the complex system summarized which offer the theory basis to the application of complex systems.