【摘要】 对当前典型的水下无线通信网进行分析,针对水声、光、射频3种通信模式在水下无线通信中的优缺点,提出基于软件无线电技术的多模式自适应水下无线通信网络的概念及其框架结构,并对其中的自适应调制解调方式展开研究。结合MAC层协议,提出一种跨层的自适应调制解调解决方案,即通过收发双方的握手信息携带当前信道状态,由发射方根据握手信息,判断双方通信距离,预计信道未来状态,结合需要传输的数据量,自适应选择合适的通信模式和调制方式,并利用握手信号通知接收方,从而实现在通信网络范围内数据或指令的快速可靠传输。更多还原

【Abstract】 This article analyzed the current typical underwater wireless communication networks,discussed with the advantages and disadvantages among the several kinds of communication modes in underwater wireless communication,such as the acoustic,optical and radio,proposed the concept and framework of SDR-based,multi-mode adaptive underwater wireless communication networks,and researched the adaptive modulation/ demodulation method.Combination of MAC layer protocol,it proposed a cross-layer adaptive modulation/demodulation solution,namely through the current channel state carried by the hands information,the transmiter selectted the appropriate communication mode and adaptive modulation.Based on judging the distance between the transmitter and receiver,was the future forcastted state with channel.Considering the needed data volume,it noticed the receiver by handshake signal.Thus,it will realize rapid and reliable transmission of data or instructions within the communication network.更多还原