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基于残余自干扰获取的带内全双工水声通信系统结构方案与仿真
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中国船舶集团有限公司第七一O研究所 宜昌 443003


In-Band Full-Duplex Underwater Acoustic Communication System Structure Scheme and Simulation Based on Residual Self-Interference Acquisition
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1.No.710 R&2.D Institute,CSSC

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    摘要:

    强自干扰抵消是带内全双工(In-Band Full-Duplex, IBFD)水声通信系统工程实现中的最大挑战。近端接收端需结合模拟域及数字域进行联合干扰抵消才可将干扰强度降低至可接受水平。本文提出一种基于残余干扰获取的带内全双工水声通信系统结构设计方案，其特征为具备主、辅双采集链路，通过辅助采集链路实现对干扰信号的获取，并利用辅助采集链路与消干扰信号在数字域上的抵消结果作为主采集链路数字域上的线性滤波器的输入参考信号，以实现对残余干扰的抵消。该系统结构方案与现有系统结构方案相比，在有效克服功率放大器非线性影响的同时，可降低模拟域及数字域干扰抵消系统结构复杂度；仿真数据处理结果表明，该方案可实现公里级带内全双工水声通信。

    Abstract:

    The cancellation of strong self-interference is the biggest challenge in engineering implementation of In-band Full-duplex (IBFD) UnderWater Acoustic(UWA) communication system. The near receiving end needs to combine the analog domain and the digital domain to conduct joint interference cancellation to reduce the interference intensity to an acceptable level. This paper proposes an IBFD-UWA communication system structure design scheme based on residual interference acquisition, which is characterized by having primary and secondary acquisition links. The acquisition of interference signals is realized through the auxiliary acquisition link, and the cancellation result of the auxiliary acquisition link and the interference cancellation signal in the digital domain is used as the input reference signal of the linear filter in the digital domain of the main acquisition link to realize the cancellation of residual interference. Compared with the existing system structure scheme, this system structure scheme can effectively overcome the nonlinear influence of the power amplifier and reduce the structural complexity of the interference cancellation system in the analog domain and the digital domain. The simulation results show that the scheme can realize the kilometer level IBFD-UWA communication.

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  • 收稿日期:2022-04-19
  • 最后修改日期:2022-08-11
  • 录用日期:2022-08-26
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