毫米波FBMC调制系统中基于盲扫估计的相位噪声估计研究  

Phase Noise Estimation Based on Blind Estimation for mmWave FBMC Systems

作　　者：陈达[1] 宋磊磊 陈城[1] 罗锴 王巍[1] CHEN Da;SONG Leilei;CHEN Cheng;LUO Kai;WANG Wei(Huazhong University of Science and Technology,Wuhan 430074;Sun Yat-sen University,Shenzhen 518107)

机构地区：[1]华中科技大学,湖北武汉430074 [2]中山大学,广东深圳518107

出　　处：《移动通信》2025年第2期100-107,共8页Mobile Communications

基　　金：国家自然科学基金面上项目“毫米波频段上FBMC原型滤波器设计理论与方法研究”(62071195)。

摘　　要：毫米波滤波器组多载波(FBMC)调制系统作为一种新型的调制技术,受到广泛关注的同时也面临着一些挑战。由于其发送端和接收端振荡器的非线性失真而产生的相位噪声,导致毫米波FBMC的符号恢复遭受相位噪声污染问题。目前,现有对频域类的相位噪声盲扫估计的方法表现效果欠佳。因此,提出一种频域类的基于盲扫的相位噪声估计方法。首先,针对条状图案散点处理范围处理不精确问题,利用靠近原点的条状图案及图案散点的实部连续性,采用分别向原点左右两个方向进行数据符号散点的筛选;针对符号间串扰和载波间串扰对斜率估计的影响,通过计算不同数据符号的斜率之间的二次差值去间接表示符号所收到的干扰,然后利用干扰权重去抑制受到严重干扰数据符号对斜率估计影响。仿真结果表明,相较于传统的频域类的相位噪声盲扫估计方法,提出新的方法在不同的子载波数,调制阶数,以及不同相位噪声变化场景下,误比特率等性能指标有显著提升。As a novel modulation technology,mmWave filter-bank multi-carrier(FBMC)modulation system has attracted widespread attention but still faces some challenges.Due to the phase noise caused by the nonlinear distortion of the oscillators at the transmitter and receiver,the symbol recovery of the mmWave FBMC suffers from phase noise pollution.Currently,for the mmWave FBMC modulation system,the existing method for blind scanning estimation of phase noise in the frequency domain are not very effective,and thus a frequency domain phase noise estimation method based on blind scanning is proposed.First of all,for the problem of imprecision in the determining boundary range of the stripe pattern scatter,this paper utilizes the real part continuity of the strip pattern and pattern scatter points close to the origin to determine the symbol scatters in the positive and negative directions,respectively.Then,for the effects on the slope estimation of the inter-symbol interference and the inter-carrier interference,this paper utilizes the quadratic difference between the slopes of different data symbols to represent the interference of the data symbol indirectly,and then the interference weight is used to suppress the effect of data symbols suffering from the serious interference on the phase noise estimation.The simulation results show that compared with the traditional phase noise estimation in the frequency domain,the proposed method can significantly improve the bit error ratio performance under different subcarriers,modulation orders,and different phase noise variation scenarios.

关 键 词：毫米波 FBMC 相位噪声估计 

分 类 号：TN929.5[电子电信—通信与信息系统]