Blind maximum likelihood CFO estimation for OFDM systems via polynomial rooting

被引：59

作者：

Gao, FF ^{[1
]}

Nallanathan, A ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 119260, Singapore

来源：

IEEE SIGNAL PROCESSING LETTERS | 2006年 / 13卷 / 02期

关键词：

blind carrier frequency offset (CFO) estimation; orthogonal frequency division multiplexing (OFDM); polynomial rooting; virtual carriers;

D O I：

10.1109/LSP.2005.861583

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The blind carrier frequency offset estimation problem has been well studied by exploiting the virtual carriers existing in practical orthogonal frequency division multiplexing transmissions. A highly efficient approach by rooting a polynomial has been proposed in the literature. However, this rooting method is suboptimal when noise is present. In this letter, we propose an improved polynomial rooting method that is shown to be the maximum likelihood estimator for both the noisy and the noise-free case.

引用

页码：73 / 76

页数：4

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