Iterative algorithm for phase-noise compensation in OFDM systems

被引：0

作者：

Wu H.-W. ^{[1
]}

Yang S.-Z. ^{[1
]}

Ou J.-L. ^{[2
]}

Yang L.-S. ^{[1
]}

机构：

[1] Center of Communication and Tracking Telemetering and Command, Chongqing University

[2] College of Communication Engineering, Chongqing University

来源：

Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2011年 / 39卷 / 10期

关键词：

Common phase error; Equalization; Iteration; Orthogonal frequency division multiplexing; Phase noise;

D O I：

10.3969/j.issn.1000-565X.2011.10.005

中图分类号：

学科分类号：

摘要：

In order to compensate the interference from the phase noise (PHN) of local oscillators in orthogonal frequency division multiplexing (OFDM) systems, an iterative algorithm for PHN estimation and equalization is proposed based on the interpolation of estimated common phase error (CPE). In this algorithm, based on the slowgoing characteristic of PHN between neighbor symbols, PHN is estimated by acquiring the interpolation of the CPE estimation. Then, with the estimated PHN as the initial value, the iterative estimations of PHN and data symbols are jointly carried out, thus recovering the modulation symbols. Simulated results show that, as compared with the conventional method based on the CPE coefficient, the proposed algorithm is of better BER (Bit Error Ratio) performance and lower complexity at the same iterative number. In addition, the proposed algorithm without iteration is superior to the simple non-iteration CPE correction one in terms of BER performance, especially in the environments with severe PHN.

引用

页码：26 / 31

页数：5

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