基于分段Logistic和自编码的扩频码构造

Construction of spread-spectrum codes based on piecewise logistic and self-coded

针对现有随机序列用于扩频通信时可靠性和安全性差的情况,提出了将混沌映射与自编码相融合的扩频序列构造方法,以实现高动态通信条件下信息的可靠安全传输。该方法借鉴离散标准映射的构造思想,对二维Henon变换进行改进,并将分段Logistic混沌映射产生序列与AR自编码序列相融合产生高质量复合随机序列作为扩频码。以混沌和自编码为基础分析了该方法有效性、提高了序列的复杂度。仿真结果表明,与现有方法相比,该方法改善了序列的随机性,产生的扩频序列的抗干扰能力更好,并能获得较低的扩频误码率。

The poor communication reliability and safety of the existing random sequence when it is used in spread spec- trum communication are paid attention, and a method for construction of spread spectrum sequences by combining chaotic maps with self-coded codes is proposed to achieve information＇ s reliable and secure transmission under high-dynamic communication conditions. This method uses the constructing thought of discrete standard mapping to improve the two-dimensional Henon transform, and combines the sequence generating a sequence piecewise logistic chaotic map with the self-coded sequence to generate a high quality composite random sequence as the spreading code. The effectiveness of the method is analyzed based on Chaos and self-coded. The simulation results show that compared with the existing method, the proposed method improves the randomness of the sequence and increases the complexity of the sequence, and the generated spread spectrum sequece has the better anti-jamming capability and a lower spread bit error rate.