| A Novel Minimum Output Variance Estimator for Carrier Frequency Offset in OFDM Systems |
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| 作者姓名： | 李培胜 张贤达 苏泳涛 武露 |
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| 作者单位： | Department of Automation Tsinghua University，Department of Automation Tsinghua University，Department of Automation Tsinghua University，Department of Automation Tsinghua University，Beijing 100084 China，Beijing 100084 China，Beijing 100084 China，Beijing 100084 China |
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| 基金项目： | 国家自然科学基金;清华大学智能技术与系统国家重点实验室开放性基金 |
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| 摘 要： | In orthogonal frequency-division multiplexing (OFDM) systems, the carrier frequency offset (CFO) destroys the orthogonality among subcarriers which degrades system performance. Various CFO estimation methods have been developed to compensate for the CFO at the receiver. This paper describes a novel minimum output variance method for OFDM systems with CFO in additive white Gaussian noise channels. This method utilizes the phase and the amplitude of the received signal and reduces the mean square error of the CFO by about 3 dB compared with the original minimum output variance method.
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| 关 键 词： | 载体频率 正交频率 多路技术 方差 |
| 收稿时间： | 2006-12-19 |
| 修稿时间： | 2007-06-30 |
A Novel Minimum Output Variance Estimator for Carrier Frequency Offset in OFDM Systems |
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| Peisheng Li, Ü, Xianda Zhang,
྾, Yongtao Su, ÏÏÛ,Lu Wu, &#x;.A Novel Minimum Output Variance Estimator for Carrier Frequency Offset in OFDM Systems[J].Tsinghua Science and Technology,2007,12(6):674-677. |
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| Authors: | Peisheng Li Ü Xianda Zhang
྾ Yongtao Su ÏÏÛ Lu Wu &#x; |
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| Institution: | aDepartment of Automation, Tsinghua University, Beijing 100084, China |
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| Abstract: | In orthogonal frequency-division multiplexing (OFDM) systems, the carrier frequency offset (CFO) destroys the orthogonality among subcarriers which degrades system performance. Various CFO estimation methods have been developed to compensate for the CFO at the receiver. This paper describes a novel minimum output variance method for OFDM systems with CFO in additive white Gaussian noise channels. This method utilizes the phase and the amplitude of the received signal and reduces the mean square error of the CFO by about 3 dB compared with the original minimum output variance method. |
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| Keywords: | carrier frequency offset (CFO) orthogonal frequency-division multiplexing (OFDM) additive white Gaussian noise (AWGN) minimum output variance (MOV) |
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