| 载波频偏估计复矢量FFT算法研究 |
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| 引用本文： | 陈大夫,张尔扬.载波频偏估计复矢量FFT算法研究[J].信息工程大学学报,2006,7(3):244-247,279. |
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| 作者姓名： | 陈大夫 张尔扬 |
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| 作者单位： | 国防科技大学,电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 文章基于mPSK调制的正交解调,首先构造一个载波频偏的希尔伯特复矢量,然后根据最大似然参数估计原理,提出一种快速傅里叶变换频偏估计算法。该算法能够精确地检测出载波频偏的绝对值大小和正负方向;当输入端信噪比大于一定门限时,其估计精度与输入端信噪比大小无关。它可应用于中继卫星通信中多普勒频率的捕获跟踪。
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| 关 键 词： | 卫星通信 载波恢复 希尔伯特变换 mPSK FFT |
| 文章编号： | 1671-0673（2006）03-0244-04 |
| 收稿时间： | 2006-02-21 |
| 修稿时间： | 2006-02-212006-06-12 |
Study on the Algorithm to Estimate Carrier Frequency Deviation
with FFT of a Complex Vector |
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| CHEN Da-fu,ZHANG Er-yang.Study on the Algorithm to Estimate Carrier Frequency Deviation
with FFT of a Complex Vector[J].Journal of Information Engineering University,2006,7(3):244-247,279. |
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| Authors: | CHEN Da-fu ZHANG Er-yang |
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| Affiliation: | National University of Defence Technology, Changsha 410073, China |
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| Abstract: | Structuring a Hibert complex vector of carrier frequency-deviation in the mPSK's demodulation,based on the maximum-likelihood approach and using Fast Fourier Transform,an algorithm for accurately estimating the carrier frequency-deviation of absolute value and polarity is presented,whose precision is independent of the input Signal-to-Noise.It can be used for satellite communications in order to capture and track the Doppler frequency. |
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| Keywords: | satellite communication carrier recovery hibert translation mPSK FFT |
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