FMT与FBMC/OQAM非正交接入波形共存分析及处理  

Coexistence analysis and processing of FMT and FBMC/OQAM non-orthogonal access waveforms

作　　者：邵凯[1,2] 高世雄 王光宇 SHAO Kai;GAO Shixiong;WANG Guangyu(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Chongqing Key Laboratory of Mobile Communication Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]移动通信技术重庆市重点实验室,重庆400065

出　　处：《系统工程与电子技术》2020年第6期1402-1409,共8页Systems Engineering and Electronics

基　　金：重庆市科委项目(cstc2017shmsA130115)资助课题。

摘　　要：针对滤波多音调制(filtered multi-tone modulation,FMT)和滤波器组多载波/交错正交幅度调制(filterbank-based multicarrier/offset quadrature amplitude modulation,FBMC/OQAM)波形非正交接入共存问题,提出了应用快速卷积方法进行数值化分析的方案。通过快速卷积方法,在相邻的频段同时产生FMT和FBMC/OQAM信号,以快速傅里叶变换粒度调整保护间隔,得到FMT频谱频点的变化值,构建FBMC/OQAM对FMT系统的干扰矩阵,并提出预编码方案优化滤波器过渡带系数消除干扰。仿真实验表明,快速卷积方法能更精确分析波形之间的干扰,通过所提预编码方案,FMT和FBMC/OQAM信号之间可以高效率共存,波形之间的干扰得到有效抑制,受干扰影响的误码率性能得到有效改善。Aiming at the non-orthogonal access coexistence problem of filtered multi-tone modulation(FMT)and filterbank-based multicarrier/offset quadrature amplitude modulation(FBMC/OQAM)waveforms,this paper proposes a fast convolution method to give numerical analysis.Fast convolution is applied to generate FMT and FBMC/OQAM signals simultaneously in adjacent frequency bands,and the changed frequency spectrum value of the FMT can be obtained by adjusting the guard band at the level of fast Fourier transform bins.Thus the interference matrix of the FBMC/OQAM to the FMT system is constructed accordingly,and a precoding scheme is proposed for transition band weights of the prototype filter to eliminate the interference.Simulation experiments show that the fast convolution method can achieve more accurate analysis of interference between waveforms,by using the proposed precoding scheme,FMT and FBMC/OQAM signals can coexist efficiently,and the interference between waveforms is effectively suppressed.The bit error rate characteristics influenced by interference is improved efficiently.

关 键 词：波形共存 滤波多音调制 快速卷积 预编码 

分 类 号：TN92[电子电信—通信与信息系统]