基于优选混沌切换序列的TDCS伪随机相位生成方法

为了提高变换域通信系统(transform domain communication system,TDCS)基函数的随机性与相关性,提出了一种基于优选混沌切换序列映射产生基函数伪随机相位的方法。该方法首先根据参数的不同设置产生混沌序列,然后根据平衡性与自相关性进行优选,得到优选后的序列进行映射产生伪随机相位,生成的基函数通过对数据进行调制实现通信。与传统一维m序列产生方法相比,利用优选混沌切换映射产生的基函数具有更好的随机性和相关性,在多用户条件下,有效降低了系统误码率,提高了变换域通信系统的抗截获能力,具有良好的多址应用能力。

The pseudorandom phase generation in TDCSbased on preferred chaos sequence

In order to improve the randomness and correlation of Basis Function in Transform Domain Communication System(TDCS), A method that based on preferred chaos switch mapping sequence is proposed. The method firstly generates chaos sequence according to parameter, then chooses the preferred sequence base on balance and correlation, lastly utilizes the preferred sequence to map the pseudorandom phase, TDCS implements communication by modulating data on the Basis Function. Compare to the Basis Function generated by traditional one-ary m method, The Basis Function generated by preferred mapping sequence performs better randomness and correlation, the Bit Error Rate (BER) performances of multi-user using new method are improved, and thereby it is enhanced multiple access channel capacity and Low Probability of Intercept of TDCS.