基于相位噪声加性高斯化的全双工极化自干扰消除研究

项目名称： 基于相位噪声加性高斯化的全双工极化自干扰消除研究

项目编号： No.61501050

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 刘芳芳

作者单位： 北京邮电大学

项目金额： 20万元

中文摘要： 为突破全双工中乘性相位噪声对自干扰消除性能的限制瓶颈，课题利用全双工信号所固有的极化属性，开创性地提出通过极化信号处理将乘性相位噪声进行加性高斯化处理来提升自干扰消除性能的思想。课题围绕如何实现加性高斯化相位噪声影响下的极化自干扰消除展开。首先研究全双工信号的极化状态控制机制并充分论证相位噪声加性高斯化特性，进而构建具有相位噪声的全双工极化自干扰信号模型，在此基础上研究不同信道条件下的极化自干扰消除方案，最后对极化全双工系统相比于半双工系统的数据速率增益进行研究，推导增益上限并提出优化增益性能的方案。课题从根本上解决了全双工传统自干扰消除受限于乘性相位噪声的科学难题，力争使自干扰消除性能逼近于理论上限，向实现全双工频谱效率倍增的目标迈出坚实的一步。

中文关键词： 全双工；自干扰消除；极化信号处理；相位噪声；加性高斯化

英文摘要： To break the bottleneck limit caused by phase noise, this proposal investigates polarization based phase noise Gaussianization for self-interference cancellation in full-duplex system. Taking advantage of polarization signal processing, the multiplicative phase noise will be transformed to an additive complex Gaussian noise. Hence, the self-interference signal can be cancelled effectively to noise floor without any prior knowledge of the phase noise. The research will be developed on the focus of polarization based phase noise Gaussianization and self-interference cancellation to optimize the data rate of full-duplex system as following. Firstly, the methods to control polarization of the full duplex system signals are investigated. Meanwhile, the principle of transforming phase noise to the additive Gaussian process is fully demonstrated; the full duplex polarization self-interference signal considering phase noise is built, and the cancellation schemes under different channel conditions are then researched. Secondly, the rate gain of the full duplex compared with the half duplex is researched, the upper bound of the gain is derived and corresponding scheme is proposed to optimize the rate gain. Rely on this project, the critical problem of limiting the self-interference reduction in traditional cancelation, which is due to phase noise, will be solved. A theory system, based on additive Gaussianized phase noise to reduce the polarized self-interference, is expected to be creatively established in the field of full duplex in wireless communication. This research will enable to double the spectrum efficiency further with approaching the theoretic upper bound limitation of self-interference cancellation.

英文关键词： Full-duplex;Self-interference cancellation;Polarization signal processing;Phase noise;Additive Gaussianization