全相位频谱校正技术在水声通信中的应用研究  

Research on the application of all-phase spectrum correction technique in underwater acoustic communication

作　　者：孙向前 李晴 范展[2,3] 

机构地区：[1]广东湛江91388部队 [2]哈尔滨工程大学水声技术重点实验室 [3]哈尔滨工程大学水声工程学院

出　　处：《声学技术》2015年第2期127-133,共7页Technical Acoustics

基　　金：国家自然科学基金资助项目(51279043;61201411);国家"863计划"资助项目(2013AA09A503)

摘　　要：多普勒效应是影响水下移动通信性能的主要因素,准确估计多普勒频移对提高通信系统可靠性具有重要意义。在进行离散频谱分析时,时域非整周期截断会造成频域能量的泄漏,导致频谱估计精度降低。全相位频谱分析具有良好的抑制频谱泄漏特性及相位不变性。仿真验证了全相位频谱校正技术相对于传统频谱校正技术在估计性能上的优势,并在此基础上探讨了全相位频谱校正技术在水声通信中的应用。采用全相位频谱校正技术进行多普勒频移估计,进而进行多普勒补偿以降低通信系统误码率。仿真结果表明,全相位频谱校正技术能够实现高精度多普勒频移估计,从而提高水下移动通信系统的可靠性。The Doppler effect is a main factor influencing the performance of underwater mobile communication, so it＇s important to effectively estimate the frequency shift for the improvement of the system reliability. Resulting from non-inter-period sampling in time domain, the leakage error of discrete spec^m analysis leads to reducing accuracy of spectrum estimation. The satisfactory characteristics of all-phase spectrum analysis are lower spectrum leakage level and non-phase shift. Simulation experiments prove that aU-phase spectrum correction technique has the advantage in precision over traditional methods. Furthermore, the application of all-phase spectrum correction in underwater acous- tic communication is studied. The technique is adopted for Doppler estimation and compensation to reduce the error rate of system. Simulation results show that adopting all-phase spectrum correction for high frequency estimation ac- curacy improves the reliability of underwater mobile communication system.

关 键 词：全相位频谱分析 全相位频谱校正 水声通信 多普勒 

分 类 号：TN929.3[电子电信—通信与信息系统]