项目名称: 分布式天线OFDM中针对多频偏的补偿技术研究
项目编号: No.61201266
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 电子学与信息系统
项目作者: 邓凯
作者单位: 宜宾学院
项目金额: 25万元
中文摘要: 在采用分布式天线的正交频分复用(OFDM)无线通信系统中,由于分布在不同地理位置的各个天线使用的晶振不同等原因,导致可能存在多个载波频偏。此时,传统的针对单个频偏的简单频偏补偿方法不再适用,需要研究其他的信号处理方法来对多个频偏进行补偿。 本项目旨在从发射端和接收端两个角度探索分布式天线OFDM中针对多个频偏的频偏补偿理论和方法,解决存在多个频偏时的频偏补偿中的关键技术问题。建立具有普遍意义的针对多个频偏的频偏补偿问题的系统模型,从理论上准确分析多个频偏对系统性能的影响。研究接收端最优初始频偏校正和低复杂度频偏补偿方法以及频偏补偿与信号检测的联合处理。探索发射端频偏预补偿以及不受频偏影响的分布式发射信号设计原则和方法。 本研究成果可应用于未来基于分布式天线思想的分布式蜂窝移动通信网、分布式无线局域网、分布式数字无线广播等无线通信系统中,具有重要的理论及经济价值。
中文关键词: 分布式天线;OFDM;频偏补偿;迫零检测;全双工
英文摘要: In orthogonal frequency division multiplexing (OFDM) wireless communication systems with distributed antennas, since the multiple antennas are distributed at different geographic locations, there probably exist multiple carrier frequency offsets (CFOs). Therefore, the traditional simple CFO compensation method aiming at a single CFO becomes invalid, and some other signal processing methods are needed to compensate for multiple CFOs. This project aims at exploring the theory and methods for compensation of multiple CFOs at both the transmitter and the receiver in OFDM systems with distributed antennas, and finding solutions to crucial issues on compensation of multiple CFOs. We will set up the general system model for the problem of compensation of multiple CFOs, and make exact theoretical analysis about the impact of multiple CFOs on the system performance. We will study the optimal initial CFO correction, low-complexity CFO compensation methods and the joint processing of CFO compensation and signal detection at the receiver. And we will also explore CFO pre-compensation at the transmitter and design of distributed transmitted signals immune to CFOs. The results of this project can be adopted in future wireless communication systems with distributed antennas, such as distributed cellular mobile communication ne
英文关键词: Distributed antennas;OFDM;Frequency offset compensation;Zero-forcing detection;Full duplex