A Full-Duplex Transceiver Architecture and a Self-Interference Channel Estimation Method to Suppress the Phase Noise

收发机 相位噪声 电子工程 计算机科学 估计员 频道(广播) 振荡器相位噪声 单天线干扰消除 噪音(视频) 干扰(通信) 电信 工程类 噪声系数 无线 带宽(计算) 数学 人工智能 放大器 统计 图像(数学)
作者
Haotian Liang,Xin Quan,Pingzhi Fan,Xiaoxu Zhang
标识
DOI:10.1109/vtc2023-fall60731.2023.10333761
摘要

Phase noise is known as a main bottleneck in full-duplex (FD) communications, and limits the self-interference (SI) cancellation capability. There exist some works to mitigate the negative impact of phase noise, but usually relying on a perfect self-interference (SI) channel response information, which is difficult to be estimated accurately because of phase noise behavior. To improve the SI cancellation capability and suppress the impact of phase noise, we propose a multiple-downconversion FD transceiver design, which includes a new FD transceiver architecture and an SI cancellation algorithm. The proposed FD transceiver architecture deploys multiple receive chains to downconvert the signal split from the receive antenna. Particularly, the oscillator signal of each receive chain is originated from the transmit oscillator with a unique delay, such that the phase noises contained in the multipath SI components can be partially compensated. The SI cancellation algorithm includes a phase noise coefficients extraction step and an SI channel estimation step. As the extracted phase noise coefficients are used in the SI channel estimation, the estimation accuracy is improved. Simulation results show that, the limit of cancellation capability of the proposed FD transceiver with the proposed SI channel estimator is improved by 10 dB compared to that of the proposed FD transceiver with least square (LS) channel estimator.
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