四种数字混沌扩频序列的平衡性分析

探讨了Chebyshev、改进型Logistic、Logistic和Tent四种典型混沌映射的映射参数与平衡性之间的关系，得出了混沌序列新的映射参数取值范围，为混沌扩频码的产生提供了依据；并通过四种混沌序列的平衡性曲线图和映射参数对混沌扩频通信系统的误码率影响曲线图，验证了新取值范围的正确性。仿真和分析表明：Chebyshev映射的平衡性最好。

Balance analysis of four digital chaotic spread spectrum sequences

The research on the balance of chaotic sequence has important significance to spread-spectrum communication. The relationship between the balance and the parameter of four typical chaotic maps (Chebyshev, improved Logistic, Logistic and Tent) was discussed. The new numeric ranges of initial value and fractal parameter were decided, which provided reference for the generation of chaotic spread-spectrum sequence. Through the graphs of the four chaotic sequences' balance and the error-bit rate performance of these systems with the four chaotic sequences' map parameters, the new numeric ranges were validated. Both simulation results and the analysis show that the balance of Chebyshev is the best.