In this paper,we study the orthogonal time frequency space signal transmission over multi-path channel in the presence of phase noise(PHN)at both sides of millimeter wave(mmWave)communication links.The statistics char...In this paper,we study the orthogonal time frequency space signal transmission over multi-path channel in the presence of phase noise(PHN)at both sides of millimeter wave(mmWave)communication links.The statistics characteristics of the PHN-induced common phase error and inter-Doppler interference are investigated.Then,a column-shaped pilot structure is designed,and training pilots are used to realize linear-complexity PHN tracking and compensation.Numerical results demonstrate that the proposed scheme enables the signal to noise ratio loss to be restrained within 1 dB in contrast to the no PHN case.展开更多
在分析本振相位噪声对正交频分复用(orthogonal frequency division multiplexing,OFDM)系统性能影响的基础上,建立了一种新的相噪频域模型,并基于该模型提出了加入相噪估计导频来跟踪相噪的方法。由于导频与数据子载波之间有空子载波...在分析本振相位噪声对正交频分复用(orthogonal frequency division multiplexing,OFDM)系统性能影响的基础上,建立了一种新的相噪频域模型,并基于该模型提出了加入相噪估计导频来跟踪相噪的方法。由于导频与数据子载波之间有空子载波作为保护间隔,该方法可以估计出相噪的高阶频谱分量,从而有效地抑制相噪引入的共同相位误差(common phase error,CPE)和载波间干扰(inter-carrier interference,ICI)。仿真结果表明方法的有效性。展开更多
On the basis of the analysis of the effect of PHase Noise (PHN) and Common Phase Error (CPE) on Orthogonal Frequency Division Multiplexing (OFDM) systems, a cost function is constructed. By the cost function and the i...On the basis of the analysis of the effect of PHase Noise (PHN) and Common Phase Error (CPE) on Orthogonal Frequency Division Multiplexing (OFDM) systems, a cost function is constructed. By the cost function and the idea of Least-Mean-Square (LMS) adaptive algorithm, the adaptive algorithm for the correction of CPE is presented. The simulations have been performed to investigate the performance for tracking PHN and estimating CPE, the results show that the algorithm performs soundly.展开更多
MIMO OFDM无线多媒体通信系统中,载波频偏导致接收信号的载波不再正交产生公共相位误差(CPE),降低了OFDM的性能。为消除CPE的影响,本文提出在MIMO检测之前,分别利用各天线支路的CPE对接收到的每天线支路信号作补偿。模拟结果表明,该方...MIMO OFDM无线多媒体通信系统中,载波频偏导致接收信号的载波不再正交产生公共相位误差(CPE),降低了OFDM的性能。为消除CPE的影响,本文提出在MIMO检测之前,分别利用各天线支路的CPE对接收到的每天线支路信号作补偿。模拟结果表明,该方法能提高MIMO OFDM系统的误比特率性能。展开更多
基金supported by the National Natural Science Foundation of China(62071097)the Sichuan Science and Technology Program(2023NSFSC0458).
文摘In this paper,we study the orthogonal time frequency space signal transmission over multi-path channel in the presence of phase noise(PHN)at both sides of millimeter wave(mmWave)communication links.The statistics characteristics of the PHN-induced common phase error and inter-Doppler interference are investigated.Then,a column-shaped pilot structure is designed,and training pilots are used to realize linear-complexity PHN tracking and compensation.Numerical results demonstrate that the proposed scheme enables the signal to noise ratio loss to be restrained within 1 dB in contrast to the no PHN case.
基金Supported by the National Natural Science Foundation of China (No.60332030).
文摘On the basis of the analysis of the effect of PHase Noise (PHN) and Common Phase Error (CPE) on Orthogonal Frequency Division Multiplexing (OFDM) systems, a cost function is constructed. By the cost function and the idea of Least-Mean-Square (LMS) adaptive algorithm, the adaptive algorithm for the correction of CPE is presented. The simulations have been performed to investigate the performance for tracking PHN and estimating CPE, the results show that the algorithm performs soundly.
