混合载波系统高阶计算分集方法  

High-order computation diversity for hybrid carrier system

作　　者：冯雨晴 房宵杰 沙学军[1] 宋鸽 FENG Yuqing;FANG Xiaojie;SHA Xuejun;SONG Ge(School of Electronics and Information Engineering,Harbin Institute of Technology,Harbin 150001,China;Science and Technology on Communication Networks Laboratory,China Electronics Technology Group Corporation Fifty-fourth Institute,Shijiazhuang 050080,China)

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001 [2]中国电子科技集团公司第五十四所通信网信息传输与分发技术国家重点实验室,河北石家庄050080

出　　处：《系统工程与电子技术》2023年第3期859-868,共10页Systems Engineering and Electronics

基　　金：国家自然科学基金(61901140);黑龙江省自然科学基金(YQ2021F003);中国博士后科学基金(2019M650067);通信网信息传输与分发技术国家重点实验室基金(SCX21641X003)资助课题。

摘　　要：面向多载波系统的分集方案对于通信技术的发展而言至关重要,针对混合载波系统设计分数域四分量计算分集(fractional domain four-component computation diversity,FDFC-CD)方法,利用分数傅里叶信号含有多个时频分量的特点提高混合载波系统的分集性能,并基于多分量扩展的计算分集方法存在能量分布不均匀的背景,提出高阶计算分集方法,并进行了相应的仿真验证。针对高阶分数域四分量计算分集数据块内部部分点位相关性过高的问题,提出了基于数据块反转的能量平均化策略。仿真结果表明,高阶计算分集可以使系统比特误码率得以降低,且分集阶数越高,降低效果越好,其阶数选择受限于系统资源、链路衰减和接收机灵敏度。能量平均化策略的提出完善了高阶计算分集方法,二者结合良好,分集效果得到了进一步提高。A diversity scheme for multi-carrier systems is essential for the development of communication technology.A fractional domain four-component computational diversity(FDFC-CD)method is designed for hybrid carrier systems to improve the diversity performance of hybrid carrier systems by using the feature that fractional Fourier signals contain multiple time-frequency components.The multi-component extended computation diversity(CD)has the background of uneven energy distribution and taking this fact into consideration,a high-order computation diversity method is proposed and verified by corresponding simulations.Aiming at the problem of high correlation between some points in the high-order FRFC-CD data block,an energy averaging strategy based on data block inversion is proposed.The simulation results show that high-order computation diversity can reduce the system bit error rate,and the higher the diversity order,the better the reduction effect.The choice of order is limited by system resources,link attenuation and receiver sensitivity.The proposed energy averaging strategy improves the high-order computational diversity method and with the perfect combination of the strategy and method,the diversity effect is further improved.

关 键 词：加权分数傅里叶变换 分数域四分量计算分集 能量平均化 高阶计算分集 混合载波 

分 类 号：TN92[电子电信—通信与信息系统]