一种基于Hadamard矩阵的扩频方法  

A Spread Spectrum Method Based on Hadamard Matrix

作　　者：李常春 刘绍华 王伟 谢箭 LI Changchun;LIU Shaohua;WANG Wei;XIE Jian(Chongqing Institute of Engineering,Chongqing 400056,China;Chongqing Jinmei Communication Co. ,Ltd. ,Chongqing 400030,China)

机构地区：[1]重庆工程学院,重庆400056 [2]重庆金美通信有限责任公司,重庆400030

出　　处：《无线电工程》2020年第7期530-533,共4页Radio Engineering

基　　金：重庆市教委高校创新研究群体项目(CXQTP19036)。

摘　　要：针对信道速率匹配的常用扰码实现方法容易带来误码扩散和不具备纠错能力的问题,通过对扩频技术、沃尔什码和Hadamard矩阵递推运算的研究,在Modelsimgon仿真软件中用VHDL编程实现一种基于Hadamard矩阵直接扩频方法的仿真,用于解决信道速率匹配问题。仿真结果表明,采用Hadamard矩阵的正交码组直接编码方法不仅具有抗干扰能力强的特点,同时较扰码法更利于定时信息的提取,并具有一定的纠错能力等优点。In view of the common scrambling methods of channel rate matching,which are easy to cause the problem of error diffusion and lack of error correction ability,through the research of spread spectrum technology,Walsh code and Hadamard matrix recursive operation,a simulation based on Hadamard matrix direct spread spectrum method is realized by VHDL in modelsimgon simulation software,which is used to solve the problem of channel rate matching.The results of simulation show that the orthogonal code group direct coding method based on Hadamard matrix not only has strong anti-interference ability,but also is more conducive to the extraction of timing information and has certain error correction ability than the scrambling code method.

关 键 词：速率匹配 扰码 沃尔什码 HADAMARD矩阵 扩频 

分 类 号：TN914.4[电子电信—通信与信息系统]