| 一种新的mc-PPS瞬时频率变化率的估计 |
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| 引用本文： | 张雯雯,司锡才.一种新的mc-PPS瞬时频率变化率的估计[J].电子与信息学报,2008,30(12):2881-2885. |
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| 作者姓名： | 张雯雯 司锡才 |
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| 作者单位： | 哈尔滨工程大学信息与通信工程学院,哈尔滨,150001 |
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| 基金项目： | 国家部委基金
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| 摘 要： | 该文在分数阶傅里叶(FRFT)计算分解的基础上，讨论了其某些步骤在信号检测中的冗余，提出了一种简化的分数阶傅里叶算法(RFRFT)，详细讨论了它的几种重要性质，并结合一次相位差分法提出了乘积性RFRFT(PRFRFT)算法，实现了mc-PPS的瞬时频率变化率(IFR)估计。同时借助角度变换提高了RFRFT识别参数的分辨率。该方法运算量小，易于实现。仿真结果证实了该方法能够有效地抑制噪声和交叉项，可以适应低信噪比环境。
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| 关 键 词： | 多分量多项式相位信号 瞬时频率变化率 参数估计 分数阶傅里叶变换 简化算法 |
| 收稿时间： | 2007-12-3 |
| 修稿时间： | 2008-6-9 |
A New Estimation Method of Instantaneous Frequency Rate for Multicomponent Polynomial Phase Signal |
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| Zhang Wen-wen,Si Xi-cai.A New Estimation Method of Instantaneous Frequency Rate for Multicomponent Polynomial Phase Signal[J].Journal of Electronics & Information Technology,2008,30(12):2881-2885. |
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| Authors: | Zhang Wen-wen Si Xi-cai |
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| Affiliation: | College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | This paper discusses some redundancy steps of FRFT in signal detection based on the decomposition of FRFT, and puts forward a Reduced FRFT (RFRFT) algorithm. Then it discusses several important characters of RFRFT in detail. Combined with the phase difference method, it proposes the product RFRFT arithmetic to realize the Instantaneous Frequency Rate (IFR) estimation of mc-PPS. And it enhances the parameter resolution rate of RFRFT by angle transform. This method is easy to calculate and implement. Simulation results validate the method is able to suppress the noise and cross-terms, and can apply to low SNR environment. |
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| Keywords: | Multicomponent Polynomial Phase Signal(mc-PPS) Instantaneous Frequency Rate(IFR) Parameter estimation FRactional Fourier Transform(FRFT) Reduced arithmetic |
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