Blind Frequency Ambiguity Resolution in OFDM Systems Using a Linear Precoder

Blind Frequency Ambiguity Resolution in OFDM Systems Using a Linear Precoder
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使用线性预编码器解决 OFDM 系统中的盲频率模糊度

DOI:
10.1007/s11277-012-0829-6
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发表时间:
2012-09
影响因子:
2.2
通讯作者:
Fu, Xiaolin
Fu, Xiaolin
中科院分区:
计算机科学4区
文献类型:
--
作者:
Xu, Weiyang;Fu, Xiaolin

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本文提出了一种正交频分复用系统的盲频率模糊度解决技术。该方法背后的基本思想是在离散傅里叶逆变换之前对预定义子载波中的数据应用线性预编码方案以部署相关结构,从而可以在离散傅里叶变换之后通过这些子载波之间的互相关操作来估计载波频率偏移的整数部分。进行性能分析以深入了解错误估计概率与系统参数之间的关系。这些预定义子载波的分配经过优化以避免错误估计。最后,进行数值模拟以证明所提出方法的效率以及与现有估计器的性能比较。
This paper presents a technique of the blind frequency ambiguity resolution for orthogonal frequency division multiplexing systems. The basic idea behind this method is a linear precoding scheme applied to data in predefined subcarriers before the inverse discrete Fourier transform to deploy a correlation structure, thus the integer part of the carrier frequency offset can be estimated after the discrete Fourier transform via cross correlation operations among these subcarriers. Performance analysis is carried out to gain insight into the relationship between the false estimation probability and system parameters. Allocation of these predefined subcarriers is optimized to avoid false estimation. Finally, numerical simulations are conducted to demonstrate the efficiency of the proposed method and the performance comparison with the existing estimators.
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