一种水声自适应通信的信噪比估计方法  

A Signal-to-Noise Ratio Estimation Method for Underwater Acoustic Adaptive Communication

作　　者：王巍[1] 普湛清 钮彪 陶磊 黄海宁[1] WANG Wei;PU Zhan-qing;NIU Biao;TAO Lei;HUANG Hai-ning(Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;Suzhou Soundtech Oceanic Instrument Ltd.,Suzhou 215000,China)

机构地区：[1]中国科学院声学研究所,北京100086 [2]苏州桑泰海洋仪器研发有限责任公司,江苏苏州215000

出　　处：《水下无人系统学报》2022年第6期768-773,共6页Journal of Unmanned Undersea Systems

摘　　要：针对动态通信中的信噪比(SNR)估计问题,提出了一种适用于跨介质链路自适应通信的SNR估计方法。利用低导频占用率信道估计算法过程中的重构数据对最小均方误差SNR估计算法进行改进,实现时变信道条件下的SNR跟踪。仿真结果表明,所提方法在高SNR条件下能够获得高准确度的估计结果,在低SNR条件下的估计结果能够快速下降,适合链路自适应通信的速率策略调整。所提方法给出的自适应速率调整策略可以有效降低功耗,提高通信数据率。To solve the problem of signal-to-noise ratio(SNR) estimation for dynamic communication, an SNR estimation method suitable for underwater acoustic adaptive communication in trans-media heterogeneous networks was proposed. The minimum mean square error SNR estimation algorithm was improved by using the reconstructed data in the process of a low pilot occupancy channel estimation algorithm to achieve SNR tracking under time-varying channel conditions. Simulation results show that the proposed method can obtain highly accurate SNR estimation results under high SNR conditions, and the SNR estimation results can decline rapidly under low SNR conditions, which is particularly suitable for the rate-adjustment strategy of link adaptive communication. The adaptive rate adjustment strategy given by the proposed method can effectively reduce the power consumption and improve the communication data rate.

关 键 词：跨介质异构网络 水声通信 链路自适应 信噪比估计 时变信道 

分 类 号：TJ630.1[兵器科学与技术—武器系统与运用工程] U666.7[交通运输工程—船舶及航道工程]