时频编码水声通信技术研究

Time frequency coding underwater acoustic communication

时频编码技术是利用信号码元不同时隙的不同频率进行二维信息编码的调制技术,具有较强的抗多途抗衰落能力,已被广泛应用于无线电短波信道和大气对流层散射信道,将其应用于多途效应严重的水声通信领域是一有价值的探索。

This paper proposes to use the Time-Frequency coding for underwater acoustic communication system in which there is serious multipath interference of transmitted signal. Using different frequency sequence over different time slot is well known as two-dimensional coding. The system based on this principle is found by us to have good performance against multipath interference and the data transmission rate can be increased to some extent.