LTE系统中的频偏估计算法性能分析
首发时间:2014-09-22
摘要:由于LTE系统对频偏十分敏感,所以在LTE的实际系统中需要对频偏进行准确的估计和补偿,才能保证接收系统的良好工作。因此本文讨论两种频偏估计算法,一种是本文提出的具有低复杂度的基于时域循环前缀(CP)进行频偏估计的算法,另一种是基于频域信道估计进行频偏估计的算法。同时借鉴Cramer-Rao Lower Bound(CRLB),提出了对两种频偏估计算法性能进行分析的方法。通过对两种频偏估计性能分析的仿真结果表明,两种算法都能够很好地逼近Cramer-Rao Lower Bound,从而达到LTE系统的要求。
关键词: 通信与信息系统 LTE 频偏估计 循环前缀 Cramer-Rao Lower Bound
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Performance Analysis of Frequency Offset Estimation Algorithms for LTE system
Abstract:LTE system has the drawback that it's very sensitive to the frequency offset. Therefore, it is necessary to ensure the performance of receiving system by applying accurate frequency offset estimation and compensation in actual LTE system. In this paper, we discussed two frequency offset estimation algorithms, one is proposed by this article-a low-complexity frequency offset estimation algorithm based on time-domain cyclic prefix(CP), and the other one is already studied before-frequency offset estimation algorithm based on frequency domain channel estimation. Moreover, the performance analysis of the two frequency offset estimation algorithms above based on the Cramer-Row Lower Bound is proposed. Through the numerical simulation, we can see the two algorithms can both well approximate the boundary, and meet the requirements of LTE system.
Keywords: Communication and Information System LTE frequency offset estimation Cyclic Prefix Cramer-Row Lower Bound
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No.4609817100214314****
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