| 分数阶Fourier域宽带相干LFM信号的DOA估计 |
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| 引用本文： | 魏红彬,张艳红. 分数阶Fourier域宽带相干LFM信号的DOA估计[J]. 河南师范大学学报(自然科学版), 2009, 37(4) |
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| 作者姓名： | 魏红彬 张艳红 |
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| 作者单位： | 河南教育学院,电路与系统重点学科,郑州,450046;河南教育学院,电路与系统重点学科,郑州,450046 |
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| 摘 要： | 针对具有相同时频分布的宽带相干LFM信号,提出了一种DOA估计新算法.该方法利用分数阶Fourier域前后向空间平滑技术对信号去相干,然后由MUSIC算法估计信号的DOA.这种算法既具有避免矩阵插值和汇聚变换,不需要到达角初始估计等优点,又能正确地估计宽带相干LFM信号的DOA.仿真结果验证了算法的有效性.
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| 关 键 词： | 宽带相干LFM信号 分数阶Fourier变换 DOA估计 |
DOA Estimation of Wideband Coherent LFM Signals in Fractional Fourier Domain |
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| WEI Hong-bin,ZHANG Yan-hong. DOA Estimation of Wideband Coherent LFM Signals in Fractional Fourier Domain[J]. Journal of Henan Normal University(Natural Science), 2009, 37(4) |
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| Authors: | WEI Hong-bin ZHANG Yan-hong |
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| Abstract: | In allusion to wideband LFM signals which have the same time-frequency signature,a novel algorithm of DOA estimation is proposed.In this method,the signals are non-coherent by forward /backward spatial smoothing in fractional Fourier domain,and then MUSIC is used to estimate DOA of impinging signals.This approach can estimate accurately the DOA of wideband coherent LFM signals,with the advantages such as avoiding focusing,avoiding interpolation,and no need of initial DOA estimation.The simulation results show the effectiveness of the method. |
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| Keywords: | wideband LFM signal fractional Fourier transform DOA estimation |
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