基于完备序列集的扩频码构造方法

为了改善传统扩频序列周期短、复杂度低的问题,提出一种基于完备序列集的扩频码构造方法。利用移位算法将二进制理想的二元自相关序列转换为长周期、高复杂度的完备序列集,随机地按行或列抽取完备序列集中的子序列,以其作为扩频码并用于扩频通信。利用传统伪随机序列和Logistic混沌序列分析该方法的有效性,并与现有方法相比得知,新方法可改善序列相关性,提高序列复杂度。仿真测试结果显示,完备序列具有较强的抗噪声干扰能力,并能获得较低的扩频误码率。

Constructing spread-spectrum code based on perfect sequence set

In order to solve the problem of short period and low-complexity in traditional spread spectrum sequence,a method of constructing spread-sprectrum code based on perfect sequence set is proposed in this paper.In this method firstly aperfect sequence set of long period and high complexity is obtained by using binary ideal autocorrelation sequence through the algorithm of shift.A spread spectrum code is then set by random sampling row or column sub-sequence of perfect sequence and used for spread spectrum communication.The effectiveness of this method is analysed based on traditional pseudo-random sequence and Logistic chaos sequence.Compared with the conventional method,this method can improve correlation of sequence and increase complexity of sequence.Simulation test show that the perfect sequence has strong noise immunity,and can also obtain a lower spread bit error rate.