基于虚载波的OFDM系统频偏估计算法仿真  

Simulation on the Frequency Offset Estimation Based on Virtual Carrier in OFDM System

作　　者：陈月芬[1,2] 

机构地区：[1]浙江省台州学院物理与电子工程学院,台州318000 [2]西安电子科技大学综合业务网国家重点实验室,西安710071

出　　处：《系统仿真技术》2009年第1期28-31,共4页System Simulation Technology

摘　　要：正交频分复用(OFDM)技术由于存在诸多优点而得到了广泛的应用,然而容易受频偏的影响是其存在的主要缺点之一。基于虚载波的频偏估计不需要冗余信息,相对于其他方法存在一定的优势。为此进一步研究了该算法,指出该算法中价值函数存在多解问题,从而导致估计频偏与实际频偏之间存在整数倍频差,并进一步提出可以通过选择合适的虚载波来解决该问题,仿真结果证实了其有效性。Orthogonal Frequency Division its advantages. However, the sensitivity to Multiplexing （OFDM） scheme has been widely used due to carrier frequency offset（CFO） is one of its main drawbacks. This paper focuses on the CFO estimation algorithm based on virtual carrier（ VC）, and pointed out the cost function used in this algorithm may have more than one solution, which will lead to an integer frequency offset between the estimated CFO and actual CFO. It proposed that this problem can be solved through reasonably choosing VCs which will be used to estimate the frequency offset. Simulation results have verified the validation.

关 键 词：正交频分复用 频偏估计 虚载波 

分 类 号：TN91[电子电信—通信与信息系统]