基于超Nyquist结构的无速率编码水声单载波通信迭代接收机技术研究

项目名称： 基于超Nyquist结构的无速率编码水声单载波通信迭代接收机技术研究

项目编号： No.61471138

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 张友文

作者单位： 哈尔滨工程大学

项目金额： 83万元

中文摘要： 基于超Nyquist结构结合无速率编码技术、逼近Shannon限预编码技术以及迭代接收机技术开展仿真及实际水声信道条件下的逼近信道容量的单载通信技术研究。研究内容包括：（a）时不变已知多途信道条件下的、可靠的、逼近信道容量的水声单载波通信系统结构设计与分析研究，重点开展超Nyqusit结构下的QC-LDPC卷积码预编码技术、软入软出双向判决反馈均衡器技术及软入软出自迭代软均衡器技术的研究；（b）时变窄带双扩信道条件下的基于超Nyquist结构的无速率迭代接收技术研究，重点解决迭代时变窄带稀疏双扩信道估计问题；（c）时变宽带双扩信道条件下的基于超Nyquist结构的无速率迭代接收机技术研究，重点解决迭代时变双向闭环宽带多普勒估计与补偿问题。研究意义在于促进逼近信道容量通信理论的发展，为在高度弥散、动态以及大延时的海洋环境中建立可靠的、逼近信道容量的水声通信链路提供切实可行的手段。

中文关键词： 水声通信；水声信道；载波干扰；信道估计；信道均衡

英文摘要： A Single Carrier underwater acoustic communication system operating at rates approaching channel capacity will be proposed under simulation and experimental underwater channel conditions, the scheme incorporate techniques such as super-Nyquist signaling, rateless coding, Precoding technique approaching Shannon's capacity and iterative receiver techniques. The study involves: (a) the design and performance analysis of underwater acoustic Single Carrier communication tranceiver approaching channel capacity under time-invariant and known channels, that aims to develope the encoding and decoding techniques for QC-LDPC convolutional, soft-in soft-out bidirectional decision feedback equalizer algorithm and soft-in soft-out seft-Iterating soft equalizer algorithm under a super-Nyquist architechture. (b) the design and performance analysis of a rateless coding iterative receiver based on super-Nyquist signaling under time-varying narrowband doubly spread channel conditions, that aims to develope the iterative time-varying sparse doubly spread channel estimation algorithm under narrowband assumption. (c) the design and analysis of a rateless coding iterative receiver based on super-Nyquist signaling under time-varying wideband doubly spread channel condition, that aims to develope the iterative time-varying close loop wideband doppler estimation and compensation algorithms based on soft-in soft-out bidirectional decision feedback equalizer. The study contributes to a development of the communication theory approaching channel capacity, to establish a reliable, capacity-approaching communication link under highly dispersive, dynamic and large delay ocean environment.

英文关键词： Underwater Acoustic Communication;Underwater Acoustic Channel;Carrier Interference;Channel Estimation;Channel Equalization