基于数字预处理的同时同频全双工射频自干扰抑制关键技术

项目名称： 基于数字预处理的同时同频全双工射频自干扰抑制关键技术

项目编号： No.61471108

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 沈莹

作者单位： 电子科技大学

项目金额： 85万元

中文摘要： 同时同频全双工无线通信，与时分双工、频分双工相比能提高频谱效率1倍，核心关键 技术是如何有效抑制自身发射的强信号对接收通道的干扰。目前已有技术，射频域最多抑制干扰62dB，不能满足现实工程需要。这就是本项目的目标，探寻干扰抑制能力达到80dB的射频域干扰抑制新方法。 本项目重点研究能显著提高射频自干扰抑制能力的数字预处理射频自干扰抵消架构；探索该架构下有效抑制射频自干扰的信号预处理方法；分析数字预处理射频自干扰抵消接收机的自干扰抑制理论极限；搭建实验平台，完成关键技术的理论验证。 该项目将会揭示同时同频全双工通信体制与频谱高效率传输相互作用的深层机理，对移动通信网、宽带无线接入网、军用数据链与物联网等无线通信设备和系统的设计具有现实指导意义。

中文关键词： 全双工；射频；自干扰；抑制；数字预处理

英文摘要： Comparing with TDD and FDD, the spectrum efficiency can be doubled in co-time co-frequency full duplex (CCFD) wireless communication, where the key technique is how to cancel the influence on the receiver from the strong self-interference effectively. However, at most 62 dB self-interference cancellation can be provided in RF at present, which cannot meet the requirement of the practical engineering projects. That is just the target of this project, exploring new RF cancellation method providing at least 80 dB self-interference cancellation. This project focuses on digital-preprocessing RF self-interference cancellaiton framework, with which the RF self-interference cancellation can be improved significantly. The signal preprocess method is studied so as to cancel the self-interference in RF effectively. The limitation of the self-interference cancellation is analyzed theoretically in the receiver with digital-preprocessing RF self-interference. The test platform will be established to confirm the theoretical analysis on the key techniques. The project reveals the relationship between CCFD communication mechanism and spectrum-efficient transmission, which provides effect guidance for the design of wireless communication devices and systems, such as mobile communication network, broadband wireless access network, military data link, EMC and the Internet of things.

英文关键词： Full Duplex;RF;Self Interference;Cancellation;Digital Preprocessing