CAJ | 학술논문

针对瑞利衰落信道存在定时不准、移动车载、多 UE(用户设备)间干扰和收发端具有固有频偏的情况，提出了一种全新的适用于 LTE(长期演进)系统多 UE下基站侧的频偏估计方法。该方法先估计由于加窗产生的频域展宽大小，分析频带相邻的 UE带来的频偏干扰功率的大小和范围，设计去除相邻 UE带来的干扰；再利用频偏与互相关函数的关系估计频偏。链路仿真结果表明，该方法降低了 UE间干扰，很大程度上克服了多径效应与定时不准带来的影响，得到了优于在这之前的各种方法的频偏估计拟合度和误块率性能。
침대서리쇠락신도존재정시불준、이동차재、다 UE(용호설비)간간우화수발단구유고유빈편적정황，제출료일충전신적괄용우 LTE(장기연진)계통다 UE하기참측적빈편고계방법。해방법선고계유우가창산생적빈역전관대소，분석빈대상린적 UE대래적빈편간우공솔적대소화범위，설계거제상린 UE대래적간우；재이용빈편여호상관함수적관계고계빈편。련로방진결과표명，해방법강저료 UE간간우，흔대정도상극복료다경효응여정시불준대래적영향，득도료우우재저지전적각충방법적빈편고계의합도화오괴솔성능。
For Rayleigh fading channels with inaccurate timing,vehicle moving,inter-User Equipment (UE)interference and innate frequency offset at the receiver/transmitter sides,this paper proposes a novel method suitable for the frequency offset estimation at multi-UE base station side of LTE systems.It first estimates the size of frequency domain broadening generated by window function.Then it analyzes the size and scope of the frequency offset interferences brought about by band-adjacent UE and designs to eliminate these interferences.Finally,it estimates the frequency offset by utilizing the relationship between the frequency offset and the cross-correlation function.The link simulation results show that this method reduces the inter-UE interferences and overcome the influences resulted from multipath effects and inaccurate timing to a great extent,achieving su-perior frequency offset estimation fitting and block error rate performance to those in various conventional methods.