摘要
简述了水声信道与正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统之间的必然联系,概述了基于导频符号的信道估计算法、自适应信道估计算法、子空间信道估计算法以及压缩感知稀疏信道估计方法在水声通信中的应用现状,总结了各种算法的特点,比较了各种算法的优缺点,并指出了未来水声信道估计的发展方向。
The positive connection between underwater acoustic channel and OFDM system is briefly introduced in this paper,and then the pilot-based channel estimation algorithms,adaptive channel estimation methods,subspace channel estimation algorithms and compressive sensing estimation algorithms in sparse channel are summarized.The characteristics of the above mentioned methods are generalized,and the advantages and disadvantages of various algorithms are compared.Finally,the development direction of underwater acoustic channel estimation in the future is pointed out.
出处
《声学技术》
CSCD
2012年第1期77-81,共5页
Technical Acoustics
基金
国防预研基金项目
2011年海军工程大学博士研究生创新基金项目(HGBSJJ2011006)
关键词
正交频分复用
水声信道
导频符号
最小二乘(LS)估计
自适应估计
子空间估计
压缩感知
orthogonal frequency division multiplexing（OFDM）
underwater acoustic channel
pilot signals
least square（LS） estimation
adaptive estimation
sub-space estimation
compressive sensing
