| Efficient integer frequency offset estimation for OFDM systems |
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| 作者姓名： | 吴贇 Ding Ming Luo Hanwen Huang Jianguo Liu Renmao |
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| 作者单位： | [1]Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240, P.R.China t [2]Marine Engineering College, Northwestern Polytechnical University, Xi＇an 710072, P.R.China [3]Sharp Advanced R＆D Centre, Sharp Electronnics Co. Ltd., Shanghai, P.R.China |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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国家自然科学基金 |
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| 摘 要： | An efficient scheme of integer frequency offset estimate for orthogonal frequency division multiplexing （OFDM） systems is proposed based on a training symbol with several identical
parts. In this scheme, the received training symbol is first reshaped into several sub-symbols.It shows that the reshaping process in-troduees time diversity multiplexing.After a special fast Fourier transform （FFT） algorithm is applied to the sub-symbol,the integer frequency is estimated by finding the maximum magnitude of the resulting fre-quency domain signal.To improve the estimate performance,diversity combining methods are presented to make
full use of the multiple frequency domain sub-symbols.Compared to the traditional scheme, the
proposed one has an improved estimate performance demonstrated by the computation simulation, while maintaining a very low complexity.
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| 关 键 词： | 有效整数频率 正交频分复用系统 通信 通道估计 |
Efficient integer frequency offset estimation for OFDM systems |
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| Wu Yun,Ding Ming,Luo Hanwen,Huang Jianguo,Liu Renmao.Efficient integer frequency offset estimation for OFDM systems[J].High Technology Letters,2007,13(2):164-168. |
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| Authors: | Wu Yun Ding Ming Luo Hanwen Huang Jianguo Liu Renmao |
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| Abstract: | An efficient scheme of integer frequency offset estimate for orthogonal frequency division multiplexing (OFDM) systems is proposed based on a training symbol with several identical parts. In this scheme, the received training symbol is first reshaped into several sub-symbols. It shows that the reshaping process introduces time diversity multiplexing. After a special fast Fourier transform (FFT) algorithm is applied to the sub-symbol, the integer frequency is estimated by finding the maximum magnitude of the resulting frequency domain signal. To improve the estimate performance, diversity combining methods are presented to make full use of the multiple frequency domain sub-symbols. Compared to the traditional scheme, the proposed one has an improved estimate performance demonstrated by the computation simulation, while maintaining a very low complexity. |
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| Keywords: | OFDM estimation integer carrier frequency offset FFT |
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