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码元移位键控(CSK)作为一种广义的M元扩频技术被广泛应用于水声通信领域来克服扩频增益对通信速率的限制.为了获得更高的通信速率,减少通道间干扰,并充分利用CSK的冗余信息,本文提出联合利用码元相位信息的正交双通道CSK扩频水声通信技术.首先,推导了正交CSK每符号积分输出的表达式;然后,研究了正交CSK的性能及与传统CSK和双通道CSK对比仿真的误码率;最后,通过实验验证了仿真对比的正确性.实现了正交CSK在104bits,4kHz带宽下580.6bps通信速率的有效传输.通过公式推导、仿真分析和实验研究,得到正交CSK提供了优良的性能的结论.
As a generalized M-ary spread spectrum technique, Symbol Shift Keying (CSK) is widely used in the field of underwater acoustic communication to overcome the limitation of communication rate caused by spreading gain. In order to obtain higher communication speed and reduce inter-channel interference , And make full use of the redundancy information of CSK, this paper proposes quadrature two-channel CSK spread-spectrum underwater acoustic communication technology using symbol phase information jointly.Firstly, the expression of quadrature CSK per symbol integrated output is derived. Then, The performance of orthogonal CSK and the bit error rate compared with the traditional CSK and two-channel CSK. Finally, the correctness of the simulation is verified by experiments. The effective transmission of 580.6bps communication rate of orthogonal CSK at 104bits and 4kHz bandwidth is achieved Through the formula derivation, simulation analysis and experimental research, we get the conclusion that orthogonal CSK provided excellent performance.