基于水声信道探测的相干通信自适应调整技术研究

针对水声信道的特点,研究了相干通信自适应调整技术。通过对信噪比和接收信号与本地信号相关系数的分析,提出了在一定信噪比的条件下以相关系数为参考标准,自适应调整多种相干通信调制方式,从而达到在满足较低的误比特率前提下提高传输比特速率的目的。给出了相关系数控制参数k,通过k来调节相关系数控制区域,分别在降低误比特率、提高传输速率、降低调制模式转换速率三方面提高自适应相干通信系统的性能。

Research on Adaptive Adjustment of Coherent Communication Schemes Based on Underwater Acoustic Channel Detection

In consideration of the underwater acoustic channel,the adaptive adjustment of coherent communication schemes is re- searched. Analyzing the signal to noise ratio（ SNR） and the correlation coefficient of received signal and local signal,make the corre- lation coefficient as standard,which is under certain SNR,and adaptively adjust coherent communication modulation modes,so as to improve the transmission bit rate under the lower error bit rate. In this paper,the correlation coefficient control parameter k is pro- posed. Using k to adjust the correlation coefficient control area can improve the performance of adaptive coherent communication system in lowering error bit rate,improving transmission rate,reducing the rate of switching modulation mode.