多径环境下的BOC信号的通用模型及捕获方法  

General framework and method of acquisition for BOC signal in multipath environment

作　　者：宋玉龙[1] 张天骐[1] 杨强[1] Song Yulong;Zhang Tianqi;Yang Qiang(Chongqing Key Laboratory of Signal ＆ Information Processing,Chongqing University of Posts ＆ Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065

出　　处：《计算机应用研究》2018年第7期2124-2127,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61671095;61371164);信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003);重庆市教育委员会科研项目(KJ130524;KJ1600427;KJ1600429)

摘　　要：针对BOC(binary offset carrier)信号在多径环境下缺乏将各种边峰消除方法统一起来的通用模型以及无法精确捕获的问题,提出了一种基于Rake模型的边峰消除通用精确捕获方法。该方法首先利用Rake接收机将多径BOC信号采用最大比合并的方法得到近似单径信号,然后通过建立泛化的扩频符号波形,得到其边峰消除通用模型,最后通过相关合成运算得到精确的无模糊捕获方法。理论和计算机仿真表明,该方法不仅消除了多径干扰,建立了边峰消除通用模型而且较其他方法有更精确的捕获精度,对于sin BOC(1,1)而言,检测性能比SCPC算法提高了4 d B。For the problems of BOC signal is a lack of uniform theoretical frame for the existing side-peak cancellation techniques and cannot acquire accurately in multipath environment,the paper proposed a new method based on Rake model to solve the problems. Firstly,the received signals passed through the Rake model and got the approximate single-path signal by using the method of the maximum ratio combining,then the paper presented a generalized spreading symbol waveform. Finally,the paper proposed an unambiguous acquisition method based on the combination of correlation functions. Theoretical analysis and computer simulations show that this method not only eliminates the multipath interference,makes a uniform theoretical frame for the existing side-peak cancellation techniques,but also has more accurate accuracy of acquisition. For sin BOC（1,1）,the detection performance increases by 4 d B compared to the SCPC algorithm.

关 键 词：多径 边峰消除 扩频符号 捕获精度 

分 类 号：TN911.7[电子电信—通信与信息系统]