项目名称: 宽带扩频通信和雷达系统中的低相关序列设计研究
项目编号: No.61201263
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 电子学与信息系统
项目作者: 刘凯
作者单位: 燕山大学
项目金额: 25万元
中文摘要: 本项目研究适于宽带扩频通信及雷达系统应用的序列设计。低相关序列广泛应用于扩频通信、多址通信信号检测、脉冲压缩、信号同步等方面,序列性能优良。低相关序列尚待解决的问题是如何构造具有良好性能的大容量低相关序列集。围绕此问题基于数学构造方法展开以下研究工作:(1)研究周期低相关序列集在有限域及差集理论上的构造方法,结合序列偶理论研究多相序列偶的低相关性质及数学构造方法。(2)研究非周期低相关序列偶的数值分析方法和品质因素收敛范围,建立雷达检测系统的仿真模型,衡量新序列的性能。(3)在理论界指导下研究低相关区序列(偶)的构造方法,研究其作为扩频码和同步码元在准同步码分多址通信系统中的性能。(4)提出信号正交变换的偶理论思想,研究正交矩阵偶的数学性质和构造方法,以及在序列设计和信号处理方面的应用。低相关序列设计将为宽带移动通信和雷达系统提供更广泛的信号选择空间。
中文关键词: 序列设计;编码理论;序列偶;信号设计;
英文摘要: We will give a deep study on sequence design applied in the broadboand spread spetrum communication system and radar system. Low correlation sequences with good property are applied widely in spread spectrum communications, signal identification in multiple access communication systems, pulse compression and signal synchronization.The problem to be solved at present is how to construct low correlation sets with high capacity and good sequence property.According to this problem, four reseaches are developed based on mathmatics construction methods : (1) Based on the finite fields theory and difference sets theory, the construction methods of low correlation periodic sequence sets are explored. Combined with sequence pair theory, correlation property and construction of low correlation polyphase sequence pairs are developed. (2) Computation analysis method and convergence range of merit factors of low correlation aperiodic sequence pairs are studied. New sequences are tested in the radar testing system model. (3) Under theory bounds, construction of low correlation zone sequence (pair) is studied. Performance of new sequence as spreading code and synchronization symbol are measured in quasi-synchronous CDMA systems. (4) Pair theory of signal orthogonal transformation is advanced. Mathematical nature and constructi
英文关键词: sequence design;code theory;sequence pair;signal design;