Decision Feedback Estimation of Multiple input /Multiple output Orthogonal Frequency Division Multiplexing Channel Based on Punching Technique Via UWA Shallow Sea
Decision Feedback Estimation of Multiple input /Multiple output Orthogonal Frequency Division Multiplexing Channel Based on Punching Technique Via UWA Shallow Sea
复制标题
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Wang We
中科院分区：
文献类型：
--
作者：
Wang We
主要研究多输入多输出正交频分复用(MIMO-OFDM)水声通信判决反馈信道估计技术。针对信道判决反馈估计算法误码传播的缺点，提出了一种基于信道打孔技术的改进算法。该算法利用接收原始信号与重编码后的信息信号之间的差值来判断信道补偿的准则，对不确定的子信道采用插值技术进行打孔和重估值.数值仿真和槽试数据的实验结果表明，该算法能有效地抑制误码的传播，减小突发噪声的影响，跟踪信道的变化并显著提高系统的质量。
The technique of channel decision feedback estimation of multiple input /multiple output orthogonal frequency division multiplexing( MIMO-OFDM) underwater acoustic communication system is studied. To overcome the disadvantage of error code propagation of channel decision feedback estimation algorithm,an improved algorithm based on channel punching technique is proposed. The difference between the received raw signal and the re-coded information signal is used to judge the criteria of channel compensation,and those uncertain sub-channels are punched and revalued by interpolation technique.The experimental results obtained with numerical simulation and tank-trial data are provided,demonstrating that the proposed algorithm can effectively confine the propagation of error code,abate the burst noise effect,track the variety of channel and significantly increase the quality of the system.