摘要
针对采用GFDM(Generalized Frequency Division Multiplex)多载波调制的移动通信系统中,非正交性引起的ICI(Inter Carrier Interference)、OOBE(Out of Band Emission)问题,以及在衰落信道条件下存在的时域、频域选择性衰落问题,提出了根据干扰信号能量预估值来调整原型滤波器参数以降低干扰的方法.在此基础上,采用结合了压缩感知的低复杂度预编码算法,在降低计算复杂度的同时能进一步提高频谱效率.使用Matlab软件搭建模型验证上述方法,仿真结果表明,采用上述降低干扰的方法可以将GFDM系统BER(Bit Error Rate)控制在较低水平.
The disturbances such as：ICI（Inter Carrier Interference）,OOBE（Out of Band Emission）,etc.in GFDM（Generalized Frequency Division Multiplex）multi-carrier modulation communication system may degrade system performance,and time-frequency dual-selective fading will worsen this issue.A channel estimation algorithm is introduced to lower the system＇s interferences and computational complexity,by optimizing the prototype filter parameters according to disturb signal energy.Precode and equilibrium are also chosen to suppress ICI,OOBE,and interference from other users or antennas.A simulation model by Matlab is set up,BER curves and constellation diagrams have been worked out to evaluate the system performances.The simulation result indicates that GFDM with those corrective actions may get a lower BER level.
作者
吴虹
刘兵
赵迎新
王冲
张钰婷
唐然
马肖旭
徐锡燕
穆巍炜
刘之洋
WU Hong LIU Bing ZHAO Yingxin WANG Chong ZHANG Yuting TANG Ran MA Xiaoxu XU Xiyan MU Weiwei LIU Zhiyang(College of Electronic and Optical Engineering, Nankai University, Tianjin 300350, China,Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, Chin)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2017年第9期1117-1123,共7页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金(61571244
61501262)
天津市科技计划(16YFZCSF00540
15JCYBJC51600)资助项目
关键词
广义频分复用
载波干扰
带外辐射
计算复杂度
generalized frequency division multiplex（GFDM）
inter carrier interference（ICI）
out of band emission（OOBE）
computational complexity
