中文摘要：

针对传统码元移位键控（CSK）较低的通信速率和采用m序列传统正交CSK具有较强烈的通道间干扰的问题，提出了基于小Kasami序列的正交CSK扩频水声通信技术，有效减少了通道间的干扰，并通过序列和通信方式上的优化结合获得性能上的提升。首先通过公式推导分析了影响该系统性能的因素，然后通过序列相关特性进行比较，并与由序列组成的通信系统的仿真性能进行比较。最后进行了实验验证，结果说明该方案有着相对于传统方案更优越的性能。

英文摘要：

With consideration to the problems of conventional code shift keying （CSK）, specifically with the low data communication rate and the existing strong interference between the channels of conventional orthogonal CSK which adopts the m sequence, the quadrature CSK spread spectrum underwater acoustic （UW A） communication technology utilizing the small Kasami sequence is proposed. The purpose is to reduce the interference between channels effectively, and enhance performance through optimization and combination in the sequence and communication scheme. This paper describes the factors influencing system performance and how the factors were deduced and analyzed by using specific formulas and then these factors were compared to the sequence correlation properties and the simulation performance of the communication system composed of this sequence. Finally, the experimentation results showed that the proposed scheme is superior to the conventional methods in performance.