用于mMTC的序号调制自适应接收机算法研究  

Adaptive Detector Design for OFDM with Index Modulation for mMTC

作　　者：杨晶 李烨 呼增 田丰[3] YANG Jing;LI Ye;HU Zeng;TIAN Feng(Fourth Research institute of Telecommunications Technology Co.,Ltd.,Xian 710061,China;College of Information Science and Technology,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;College of Communication&Information Engineering,Xian University of Science and Technology,Xian 710054,China)

机构地区：[1]电信科学技术第四研究所有限公司,西安710061 [2]仲恺农业工程学院信息科学与技术学院,广州510225 [3]西安科技大学通信与信息工程学院,西安710054

出　　处：《无线通信技术》2021年第3期7-12,共6页Wireless Communication Technology

基　　金：国家自然科学基金项目(62071504);广东高校青年创新人才项目(2018KQNCX114,2018KQNCX115)。

摘　　要：载波序号调制(Orthogonal frequency division multiplexing with index modulation,OFDM-IM)是最近提出来的一种传统多载波传输OFDM的一种改进。OFDM-IM通过将序号调制技术引入的传统OFDM中,可有效提高无线通信系统的能量效率和频谱效率,并获得更优的误比特性能。本文提出一种用于OFDM-IM的低复杂度自适应树形译码搜索接收机算法,通过充分挖掘信道状态信息来调节树形搜索中有效路径的数量,可获得比传统树形搜索更优的误比特性能。蒙特卡罗仿真证明了本文提出的自适应树形搜索算法在线性复杂度下可以获得接近最优的最大似然概率接收机的误比特性能。Orthogonal frequency division multiplexing with index modulation(OFDM-IM)is a novel improvement of conventional multicarrier transmission technique OFDM,which can improvement the energy efficiency and spectral efficiency of the wireless communication systems due to the introduction of IM into conventional OFDM.To reduce the computational complexity in detection,we propose a novel adaptive tree search decoding detection algorithm for OFDM-IM,which adjust the effective paths in each subcarrier level by exploiting the channel state information of the subcarriers.Monte Carlo simulations demonstrate that the proposed algorithm achieves near optimal bit error rate of maximum likelihood detector with linear computational complexity.

关 键 词：海量机器设备通信 正交频分复用 序号调制 树形译码 

分 类 号：TN925[电子电信—通信与信息系统]