基于频域牛顿迭代的水声频率估计算法研究  

Research on Underwater Acoustic Frequency Estimation Algorithm Based on Newton Iteration In Frequency Domain

作　　者：李言胜 张建成 颜琪 秦正昌 LI Yan-sheng;ZHANG Jian-cheng;YAN Qi;QIN Zheng-chang(School of Information and Control Engineering,Qingdao University of Technology,Qingdao Shandong 266525,China)

机构地区：[1]青岛理工大学信息与控制工程学院,山东青岛266525

出　　处：《计算机仿真》2022年第8期195-199,281,共6页Computer Simulation

基　　金：水声技术重点实验室开放基金(SSKF2018008);山东省重点研发计划(2019GGX101059)。

摘　　要：针对水声信道复杂多变和离散傅里叶变换带来的栅栏效应问题,提出了一种简单有效的基于频域牛顿迭代的水声频率估计算法。算法利用离散傅里叶变换粗估计接收信号频率,将粗估计值作为牛顿迭代的初始值进行两次迭代,极大弥补栅栏效应造成的估计误差,最终实现精确的水声频率估计。良好的仿真(发射频率9kHz,采样频率120kHz)、水箱试验(发射频率10kHz,采样频率120kHz,收发节点间水平距离0.4m)和海上试验(静止试验和漂浮试验均发射8组不同频率的单频信号,初始频率7kHz,终止频率14kHz,间隔为1kHz,采样频率120kHz,静止试验收发节点水平距离500m,漂浮时收发节点初始距离700m)结果均验证了所提算法的有效性。Aiming at the complexity and variability of underwater acoustic channels and the picket fence effect problem caused by the discrete Fourier transform,an easy and effective frequency estimation algorithm of underwater acoustic based on Newton iterations in the frequency domain is proposed in this paper.The discrete Fourier transform is used to estimate the received signal frequency roughly and the rough estimated value is used as the initial value of Newton iterations for two iterations to compensate for the estimation error caused by the picket fence effect greatly.Finally,an accurate estimation of underwater acoustic frequency is achieved.The good results of simulation(the transmitted frequency is 9kHz and the sampling frequency is 120kHz),water tank experiment(the transmitted frequency is 10kHz,the sampling frequency is 120kHz and the horizontal distance between the transceiver nodes is 0.4m)and sea experiment(8 sets of single-frequency signals of different frequencies are transmitted in the static experiment and the floating experiment,the initial frequency is 7kHz,the termination frequency is 14kHz,the interval of frequency is 1kHz,the sampling frequency is 120kHz,the horizontal distance between the transceiver nodes of the static experiment is 500m and the initial horizontal distance between the transceiver nodes of the floating experiment is 700m)verify the effectiveness of the proposed algorithm.

关 键 词：水声信道 栅栏效应 牛顿迭代 频率估计 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]