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结合Chebyshev源映射和通信原理中抽样理论,产生了过抽样混沌映射(OSCM),证明了OSCM也具备混沌特性.并提出利用最大平衡差函数考察序列平衡性.通过和源映射序列广义相关函数的对比,分析了自相关、互相关旁瓣的最大值和平均值,进而分析了四相OSCM序列的相关性.仿真结果表明:针对现行移动通信扩频系统地址码,四相ChebyshevOSCM序列具有良好的自相关和互相关性,可以增强系统的保密性和提升系统容量,是CDMA移动通信扩频系统地址码的优选方案之一.
Combined with the sampling theory of Chebyshev source mapping and communication principle, an oversampled chaos map (OSCM) is generated, which proves that OSCM also possesses chaotic characteristics. The balance balance function is also investigated by using the maximum balance difference function. The correlation and correlation between the four-phase OSCM sequences are analyzed.The simulation results show that the four-phase Chebyshev OSCM sequence has good performance for the current mobile communication spread spectrum system address codes Autocorrelation and cross-correlation, can enhance the system’s confidentiality and improve system capacity, CDMA mobile communication system is one of the preferred address code optimization program.