A mean-field approach for an intercarrier interference canceller for OFDM
A mean-field approach for an intercarrier interference canceller for OFDM
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DOI：
10.1088/1742-5468/2012/07/p07006
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
A. Sakata;Y. Kabashima;Y. Peleg
中科院分区：
文献类型：
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作者：
A. Sakata;Y. Kabashima;Y. Peleg
利用随机场自旋系统的数学描述与无线通信中的正交频分复用（OFDM）方案的相似性，设计了一种用于OFDM解调的载波间干扰（ICI）消除器。傅立叶域中的平移对称性一般集中来自子载波的邻域中的每个子载波的ICI的主要贡献。这种观察结合平均场方法导致ICI消除器的发展，其必要的计算成本相对于子载波的数量线性缩放。它还表明，平均场抵消器的动态被很好地捕获由一个单一的宏观变量的离散映射，而不考虑估计变量的空间和时间相关性考虑。
The similarity of the mathematical description of random-field spin systems to the orthogonal frequency-division multiplexing (OFDM) scheme for wireless communication is exploited in an intercarrier interference (ICI) canceller used in the demodulation of OFDM. The translational symmetry in the Fourier domain generically concentrates the major contribution of ICI from each subcarrier in the subcarrier’s neighbourhood. This observation in conjunction with the mean-field approach leads to the development of an ICI canceller whose necessary cost of computation scales linearly with respect to the number of subcarriers. It is also shown that the dynamics of the mean-field canceller are well captured by a discrete map of a single macroscopic variable, without taking the spatial and time correlations of estimated variables into account.