一种改进的OFDMA网络初始测距方案
An Improved Scheme for Initial Ranging in OFDMA-based Networks
摘要：
最近X. Fu等人在基于IEEE 802.16e-2005标准的正交频分多址（OFDMA）网络的上下文中描述的。所提出的解决方案旨在估计测距用户站（RSS）的功率电平和定时偏移，而不考虑接收信号与基站本地参考之间的可能载波频率偏移（CFO）的影响。出于上述问题，在目前的工作中，我们设计了一种新的OFDMA测距方案，其中测距信号被假定为在时间和频率上都不对准。我们的目标是估计每个活动RSS的定时误差和CFO。具体而言，CFO估计是通过诉诸子空间的方法来完成，而最小二乘方法用于定时恢复。计算机模拟被用来评估所提出的解决方案的有效性，并与现有的替代品进行比较。
英文摘要：
An efficient scheme for initial ranging has recently been proposed by X. Fu et al. in the context of orthogonal frequency-division multiple-access (OFDMA) networks based on the IEEE 802.16e-2005 standard. The proposed solution aims at estimating the power levels and timing offsets of the ranging subscriber stations (RSSs) without taking into account the effect of possible carrier frequency offsets (CFOs) between the received signals and the base station local reference. Motivated by the above problem, in the present work we design a novel ranging scheme for OFDMA in which the ranging signals are assumed to be misaligned both in time and frequency. Our goal is to estimate the timing errors and CFOs of each active RSS. Specifically, CFO estimation is accomplished by resorting to subspacebased methods while a least-squares approach is employed for timing recovery. Computer simulations are used to assess the effectiveness of the proposed solution and to make comparisons with existing alternatives.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
