Research Of How To Resist Phase Noise For Self-interference Cancelation In Polarization For Full Duplex

With the rapid development of wireless communication technology,the shortage of current wireless spectrum resources is becoming a severe problem,it is necessary to develop the communication technologies with high frequency spectrum utilization.Full duplex communication allows a node to transmit and receive signal simultaneously at the same frequency band.In theory,the rate of spectrum utilization and data transmission are two times than he time division duplex and frequency division duplex.The key to realize the full communication is to cancel the self-interference,and the phase noise is proved to be the bottleneck of the self-interference cancelation.So how to suppress the phase noise effectivelyis essential:The task of this paper is from the national major projects for science:"Research on power amplifier energy efficience based on cognitive and polarization signal processing(61271177)" and "Research on polarimetric self-interference cancellation in full-duplex system based on additive Gaussianized phase noise(61501050)".Aiming at this problem,a novel method in polarization domain to cancel the effect of phase noise on the self-interference cancelation and recover the desired signal is proposed in this paper.This method can be achieved by converting the multiplicative noise to additive noise with polarization signal processing in two steps.The mian work of this paper is following three aspects:(1)This paper analyzes and summarizes the current research status of the full duplex,witch include the research content,primary uses and the mian challenge.It pointed that the phase noise is the bottleneck to cancel the self-interference.In addition,this paper gives a brief introduction of the polarization signal processing technologies,which has a tremendous potential in the wireless communication,especially for the self-interference cancelation in the full duplex communication.(2)Aim at the problem that the phase noise is the bottleneck of the self-interference cancelation.A novel method for suppressing the phase noise of the self-interference cancellation is proposed in this paper.The method considers the effect of phase noise both on the self-interference and the desired signal.This method can be achieved by converting the multiplicative noise to additive noise with polarization signal processing in two steps.The first step is converting the effect of phase noise on the self-interference to the desired signal and the white noise using stokes vector processing in polarization domain,then using the reconstructed signal to cancel the self-interference signal.The second step is recovering the desired signal using the same principle.Theory analysis and numerical simulation show that the phase noise caused by the local oscillator of the transmitter and receiver is canceled,the amount of cancelation is improved by 5-10dB than the traditional cancelation method.(3)Aim at the problem that the phase nosie is the bottleneck of the self-interference cancelation of the OFDM full duplex communication.A novel algorithm for suppressing the phase noise of the self-interference cancellation of the OFDM full duplex is proposed in this paper.The method cancels the CPE(common phase error)and ICI(inter-carrier interference)both of the self-interference and the desired signal.This method can be also achieved by two steps.The first step is canceling the CPE and ICI of the self-interference,the second step is canceling the CPE and ICI of the desired signal.Theory analysis and numerical simulation show that the phase noise caused by.the local oscillator of the transmitter and receiver is canceled,the amount of cancelation is improved by 3-7dB than the traditional cancelation method.This paper proposed two algorithms to suppress the effect of phase nosie for self-interference based on the polarization signal processing,which provide a new way to cancel the self-interference in the full duplex communication system.