一种多通道混沌调相扩频方式及其在水声通信中的应用

发布时间：2018-04-13 10:42

本文选题：水声通信 + 伪随机序列　；参考：《声学学报》2017年02期

【摘要】：直接序列扩频通信是一种低检测概率通信方式,在保密通信中得到了广泛的应用。但该通信方式仍存在缺陷,其采用伪随机序列作为扩频码,而伪随机序列具有周期性和二值性等较为明显的特征,在敌对环境下这些特征可能被利用,使得直扩信号重要的特征参数被估计出来,进而引发信息泄露。针对这个问题,本文提出采用混沌调相序列代替伪随机序列,混沌调相序列是恒包络的复数值序列,可用数量多,相关特性好,而且克服了伪随机序列周期性和二值性的不足,具有更高的保密性。为了提高通信速率,将混沌调相序列与多通道技术相结合,数值仿真结果显示了该通信方式优异的误码率性能,表明该通信方式在水声通信中应用的可行性。
[Abstract]:Direct sequence spread spectrum communication (DSSS) is a low detection probability communication method, which is widely used in secure communication.However, there are still some defects in this communication mode. Pseudorandom sequences are used as spread spectrum codes, and pseudorandom sequences have some obvious characteristics, such as periodicity and binarity, which may be used in hostile environments.The important characteristic parameters of DSSS signal are estimated, which leads to information leakage.In order to solve this problem, the chaotic phase modulation sequence is proposed to replace the pseudorandom sequence. The chaotic phase modulation sequence is a complex sequence with constant envelope, which has many available quantities and good correlation characteristics, and overcomes the deficiency of periodicity and binarity of pseudorandom sequence.A higher degree of confidentiality.In order to improve the communication rate, the chaotic phase modulation sequence is combined with the multi-channel technology. The numerical simulation results show that the communication mode has excellent bit error rate performance, which indicates the feasibility of the application of the communication mode in underwater acoustic communication.
【作者单位】：中国科学院声学研究所声场声信息国家重点实验室;中国科学院大学;
【分类号】：TN914.42;TN929.3

【相似文献】