正交时频空调制的信道估计与信号检测技术研究现状
Research status of channel estimation and signal detection techniques for orthogonal time frequency space modulation
王永川 1周平 1黄局1
作者信息
- 1. 陆军工程大学石家庄校区,河北 石家庄 050003
- 折叠
摘要
正交时频空(OTFS)调制是一种适用于高多普勒衰落信道的二维时延-多普勒(DD)域复用的技术,它通过一组二维变换将时间-频率(TF)域双选择性信道转换为在DD域近乎稳定的信道,使OTFS系统有能力获得时间和频率全分集.OTFS系统要想获得这种时间和频率全分集增益,需要为接收机设计高性能的信道估计和信号检测算法.首先介绍了OTFS调制的基本原理和系统模型,然后对信道估计和信号检测算法进行了分类综述和比较,最后讨论了信道估计和信号检测的未来挑战和解决途径.
Abstract
Orthogonal time frequency space(OTFS)modulation is a multiplexing technique designed in the two-dimensional(2D)delay-Doppler domain suited for high Doppler fading channels.OTFS converts a doubly-selective channel into an almost non-fading channel in the delay-Doppler domain through a series of 2D transformations.OTFS has the potential of capturing time-frequency full diversity.In order to obtain the time-frequency full diversity gain,a re-ceiver with advanced channel estimation and signal detection algorithm is needed.The basic principle and system model of OTFS was firstly introduced,then the existing channel estimation and signal detection algorithms were reviewed,fi-nally the future challenges and solutions for channel estimation and signal detection were discussed.
关键词
正交时频空调制/信道估计/信号检测/时延-多普勒Key words
orthogonal time frequency space modulation/channel estimation/signal detection/delay-Doppler引用本文复制引用
基金项目
陆军工程大学装备综合研究基金资助项目(KYSZJKZBXM24041)
出版年
2024
国家科技期刊平台
NSTL
万方数据