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| 基于脉冲积累的LFM脉冲调制斜率的ML估计方法 | |
| 引用本文： | 汝小虎,王 聪,李 悦,姜文利. 基于脉冲积累的LFM脉冲调制斜率的ML估计方法[J]. 电讯技术, 2012, 52(10): 1628-1632 |
| 作者姓名： | 汝小虎 王 聪 李 悦 姜文利 |
| 作者单位： | 1. 国防科学技术大学电子科学与工程学院,长沙410073 2. 海军航空工程学院电子信息工程系,山东烟台264000 3. 解放军61541部队,北京100094 |
| 基金项目： | 国家自然科学基金资助项目（61002026） |
| 摘 要： | 针对以往利用单个LFM脉冲进行调制斜率估计精度不高的问题,提出了先基于脉冲积累估计脉冲调制波形,再由调制波形估计调制斜率的方法,并且论证了这种方法是最大似然(ML)的.仿真结果显示,在10个脉冲、信噪比为0 dB的情况下,该方法可使得调制斜率估计方差达到克拉美-罗限. |
| 关 键 词： | 线性调频 调制斜率 脉冲积累 最大似然估计 门限效应 |
A pulse accumulation-based ML estimation method for chirp rate of LFM pulse |
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| RU Xiao-hu,WANG Cong,LI Yue and JIANG Wen-li. A pulse accumulation-based ML estimation method for chirp rate of LFM pulse[J]. Telecommunication Engineering, 2012, 52(10): 1628-1632 | |
| Authors: | RU Xiao-hu WANG Cong LI Yue JIANG Wen-li |
| Affiliation: | 1(1.School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China;2.Department of Electronic and Information Engineering,Naval Aeronautical and Astronautical University,Yantai 264000,China;3.Unit 61541 of PLA,Beijing 100094,China) |
| Abstract: | The estimation accuracy of the chirp rate is not high using a single LFM(Linear Frequency Modulation) pulse. To solve the problem, a new method is proposed which first estimates the modulation waveform based on pulse accumulation and then estimates the chirp rate using the estimated waveform. This method is proved to be maximum likelihood(ML). Simulation results show that the estimation variance of the chirp rate achieves the Cramér Rao lower bound(CRLB) under conditions of 10 pulses with SNR(Signal to Noise Ratio) of 0 dB using the proposed method. |
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