【作者】 李沁媛； 何成兵； 张群飞； 霍思羽；

【Author】 LI Qin-yuan;HE Cheng-bing;ZHANG Qun-fei;HUO Si-yu;School of Marine Science and Technology, Northwestern Polytechnical University;

【机构】 西北工业大学航海学院；

【摘要】 被动时反是近年来水声通信中的研究热点之一,它具有一定的空时聚焦特性,已用于单载波时域均衡(SC-TDE)和正交频分复用(OFDM)系统中。单载波块传输采用频域均衡处理方式,具有计算量低、可靠性高等优点,是高速率水声通信的新方法。与OFDM一样,它要求其循环前缀长度大于水声信道多径时延扩展,长循环前缀将影响带宽利用率。为此,本文提出被动时反(TR)单载波块传输水声通信方法,可有效压缩信道,减小循环前缀长度。理论分析和仿真研究验证了该方法的有效性。更多还原

【Abstract】 For recent years the time-reversal process is one of the hotspots research in underwater communications. It has the property of space-time focusing, which has been used in single carrier time domain equalization(SC-TDE) and orthogonal frequency division multiplexing(OFDM) systems. Single carrier block transmission adopting frequency domain equalization processing, which has the advantages of low complexity and high reliability. It is a new method for high speed underwater acoustic communication. Like OFDM, single carrier block transmission requires that the length of the cyclic prefix is longer than that of the channel delay spread, and the long cyclic prefix will limit the bandwidth utilization. Therefore, this paper presents a method of passive time reversal(TR) single carrier block transmission for underwater acoustic communication. This method can compress the channel effectively and reduce the length of the cyclic prefix. Theoretical analysis and simulation studies have confirmed the validity of the proposed method.更多还原