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中文摘要：
为提高变换域通信系统多址接入性能,降低系统误比特率,提出基于改进型Logistic混沌序列的变换域扩频编码通信系统。利用扩频序列优选原则,选取改进型Logistic混沌序列作为扩频序列,对m序列产生的随机相位矢量进行相位编码形成扩频基函数的扩频随机相位矢量。仿真结果表明,该扩频基函数具有更好的随机性,产生的扩频随机相位矢量互（自）相关性能优于传统基函数产生的随机相位矢量;在2个用户和多用户条件下,其信噪比增益和误比特性能都要优于传统基函数和基于Gold序列的扩频基函数,显著提高系统抗干扰性能,能更好地实现TDCS多址接入。
英文摘要：
To improve the multiple access performance of Transform Domain Communication System, and reduce the bit error rate of system, SPC-TDCS （Spread Phase Coding based TDCS） is proposed based on modified Logistic chaotic sequence. Taking modified Logistic chaotic sequence as a spread sequence in accordance with the principle of the optimized sequence, the random phase vector generated by m sequence is utilized by phase encoding vector to form spread random phase vector （SRPV）. The simulation results show that the spread basic function has still more randomness, and the generated SRPV is superior in rela- tive performance to the traditional random phase vector. No matter in the condition of single-user or multi -users, the spread basic function based on modified Logistic chaotic sequence （SBF-ML） has an improved gained SNR, and its performance is better than that of the traditional basic function and the spread basic function based Gold sequence. By doing so, this significantly enhances anti-jamming capability and realizes further TDCS multiple access capability.
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