基于GFDM的空口波形实现及干扰抑制  

An implementation of air interface waveform based on GFDM and Interference Cancellation

作　　者：李婷[1] 杨阳 朱立东 谭琪 张少雄 汤辉[1] LI Ting;YANG Yang;ZHU Lidong;TAN Qi;ZHANG Shaoxiong;TANG Hui(Southwest China Institute of Electronic Technology,Chengdu Sichuan 610036,China;National Key Laboratory of Science and Technology on Communication,University of Electronic Science and Technology of China,Chengdu Sichuan 610036,China)

机构地区：[1]中国西南电子技术研究所,四川成都610036 [2]电子科技大学通信抗干扰技术国家级重点实验室,四川成都610036

出　　处：《太赫兹科学与电子信息学报》2020年第1期50-56,共7页Journal of Terahertz Science and Electronic Information Technology

摘　　要：广义频分复用(GFDM)具有比正交频分复用(OFDM)更低的峰均功率比(PAPR)和带外频谱泄露。因为本身固有的子载波间干扰(ICI),传统GFDM解调具有较高复杂度。本文基于导频子载波,提出一种适用于卫星通信的数据辅助干扰消除GFDM接收算法,消除了匹配滤波(MF)接收中的子载波干扰,降低了误符号率(SER)。仿真结果与复杂度分析表明,本文所提算法优于传统串行干扰消除匹配滤波算法,有助于促进GFDM在天地一体化通信系统中的应用。Generalized Frequency-Division Multiplexing(GFDM)has lower Peak to Average Power Ratio(PAPR)and out-of-band than OFDM.However,the traditional GFDM receivers have high complexity due to the intrinsic Inter-Carriers-Interference(ICI).Based on designed pilot subcarriers,a new data-aided Interference Cancellation(IC)GFDM receiver is proposed for satellite communications in this paper.The improved algorithm solves the problem of inter-subcarriers interference in Matched Filtering(MF)receiver and decreases the receiving Symbol Error Rate(SER)obviously.The simulation results and the complexity analysis prove that the proposed GFDM receiver performed significantly better than traditional GFDM receiver at reasonable computational cost,which can promote the application of GFDM in hybrid S-T communication systems.

关 键 词：广义频分复用 天地一体化通信系统 干扰消除 匹配滤波 

分 类 号：TN927[电子电信—通信与信息系统]