FrFT-OFDM系统中联合ICI自消除方案  

Combined ICI self-cancellation scheme for FrFT-OFDM system

作　　者：王震铎 朱云飞 宁晓燕[1,2] 刁鸣 WANG Zhenduo;ZHU Yunfei;NING Xiaoyan;DIAO Ming(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Advanced Marine Communication and Information Technology,Ministry of Industry and Information Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]先进船舶通信与信息技术工业和信息化部重点实验室,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2022年第8期2645-2651,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(62001138);中央高校基本科研业务费专项资金(3072021CF0809);黑龙江省自然科学基金(LH2021F009);中国博士后科学基金(2020M670885)资助课题。

摘　　要：针对分数阶傅里叶变换正交频分复用(fractional Fourier transform orthogonal frequency division multiplexing, FrFT-OFDM)系统中由时频双选信道产生的子载波间干扰(inter-carrier interference, ICI)的问题,提出了一种基于ICI自消除编码和频率偏移补偿的联合自消除方案。该方案运用带有相位补偿的自消除矩阵对信号进行编码,通过利用FrFT-OFDM系统子载波旋转角度可调的结构优势,在适宜的旋转角度下进行分数阶傅里叶变换,对频率偏移进行补偿,达到在相同编码效率下比传统ICI自消除技术更好的ICI抑制效果。仿真结果验证了该方案的性能。In order to solve the problem of inter-carrier interference(ICI) in fractional Fourier transform orthogonal frequency division multiplexing(FrFT-OFDM) system caused by time-frequency double selective channel, a joint self-cancellation scheme based on ICI self-cancellation coding and frequency offset compensation is proposed. In this scheme, the self-cancellation matrix with phase compensation is used to encode the signal. By taking advantage of the structural advantage of the adjustable rotation angle of the subcarriers in the FrFT-OFDM system, the fractional Fourier transform is carried out under the appropriate rotation angle to compensate the frequency offset, so as to achieve better ICI suppression effect than the traditional ICI self-cancellation technology under the same coding efficiency. The simulation results verify the performance of the scheme.

关 键 词：分数阶傅里叶变换正交频分复用 子载波间干扰 自消除编码 频率偏移补偿 

分 类 号：TN929[电子电信—通信与信息系统]