低时延同时同频全双工相位噪声校正关键技术

Wireless full-duplex communication is an effective method to reduce the end-to-end transmission latency between air interfaces, which transmits and receives signals simultaneously at the same frequency band. However, in the scenario of low-latency applications, the phase noise of the local oscillator becomes a key factor that prevents the full duplex communication from approaching its theoretical limit. Therefore, studying the phase noise suppression technology will contribute to the development of low-latency full-duplex communications in both theory and practice..In order to satisfy the strong requirement of low-latency communication, we focus on the phase-noise suppression and self-interference capability promotion for wireless full-duplex communications. In this project, three key issues are investigated as follows: (1) analyzing both theoretical and practical limits for the self-interference cancellation capability of a full-duplex transceiver with the presence of phase noise; (2) developing a novel receiver structure and corresponding suppression algorithm to minimize the impacts of the phase noise on multipath self-interference signals; (3) designing a practical receiver structure to maximum the self-interference cancellation capability, and verifying the structure and algorithm via experiments.

同时同频全双工在相同的频点同时发射、接收信号，是降低空中接口时延的一种有效方法。在低时延约束条件下，相位噪声是同时同频全双工逼近其接收极限性能的重要制约因素。因此，研究相位噪声校正，对推动低时延同时同频全双工发展，具有重要的理论与工程意义。.本项目面向未来低时延通信的强烈需求，以抑制相位噪声、提升同时同频全双工自干扰抑制能力为目的，重点研究如下关键问题：(1)相位噪声对同时同频全双工自干扰抑制影响的理论和工程界限分析；(2)最小化多径自干扰信号相位噪声的接收结构设计与优化校正研究；(3)工程约束下的接收结构设计与关键技术验证。

同时同频全双工在相同的频点同时发射、接收信号，是降低空中接口时延的一种有效方法。在低时延约束条件下，相位噪声是同时同频全双工逼近其接收极限性能的重要制约因素。因此，研究相位噪声校正，对推动低时延同时同频全双工发展，具有重要的理论与工程意义。.本项目面向未来低时延通信的强烈需求，以抑制相位噪声、提升同时同频全双工自干扰抑制能力为目的，重点研究了最小化相位噪声影响的全双工收发结构和自干扰抑制方法，给出了该架构下的自干扰抑制能力界限，分析了工程实现误差对该方法的影响，提出了该方法的参数选择方法。.采用项目研究的接收结构和自干扰抑制方法，可以有效提升全双工收发机的自干扰抑制能力，扩大接收机的通信范围；项目中进行的性能分析和参数选择方法，为全双工收发机的结构设计、器件选型等提供了理论依据，降低实现复杂度，可以有力推动全双工工程化进程。