摘要
针对多径条件下,FBMC/OQAM系统采用分散式导频结构的信道估计算法存在导频功率开销过大的问题,提出一种基于双导频的功率优化信道估计算法(DDP with FFT)。在传统双导频信道估计(DDP)的基础上,主动引入相位模糊,降低传输导频对的功率消耗,利用多径信道能量集中的特点,对引入的相位模糊进行估计,进一步保证信道估计准确度。理论分析和仿真结果表明,提出的优化算法可以有效降低导频功率开销,实现高精度信道估计性能。
Under the multi-path channel condition,the scattered pilot channel estimation leads to excessive pilot power overhead in filter bank multicarrier with offset quadrature amplitude modulation(FBMC/OQAM)system.An improved power efficient scattered dual dependent pilot channel estimation method(DDP with FFT)was proposed.The proposed method based on dual dependent pilot(DDP)channel estimation algorithm optimized the transmission pilot pair setting by introducing phase ambiguity.The phase ambiguity was estimated by using the characteristics of multipath channel energy to guarantee the channel estimation accuracy.Theoretical analysis and numerical results show that the proposed algorithm can effectively improve power efficiency and realize highly accurate channel estimation performance.
作者
余翔
李阳洋
段思睿
YU Xiang;LI Yang-yang;DUAN Si-rui(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
出处
《计算机工程与设计》
北大核心
2019年第11期3130-3135,共6页
Computer Engineering and Design
基金
国家科技重大专项基金项目"低功耗大连接5G系统概念样机研发"(2017ZX03001004-004)
关键词
滤波器组多载波
交错正交幅度调制
固有干扰
导频
信道估计
filter bank multicarrier(FBMC)
offset quadrature amplitude modulation(OQAM)
intrinsic interference
pilots
channel estimation
