基于循环相关变换的多径LFM信号检测与参数估计
doi: 10.3724/SP.J.1146.2005.01300
Multipath LFM Signal Detection and Parameter Estimation Based on Cyclic-Correlation Transform
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摘要: 该文针对多径条件下线性调频(LFM)信号，首先给出了信号模型，然后介绍了一种变换循环相关变换，接着结合逐次消去技术提出了基于循环相关变换的多径LFM信号检测和参数估计实用算法，该方法可准确地估计多径情况下LFM信号参数、各径时间延迟和衰减因子参数，有效地抑制了各径相关交叉项的影响。计算机仿真结果表明了该算法的有效性。Abstract: In this paper, a complex Linear FM (LFM) signal model is given, and a transform called Cyclic- Correlation Transform (CCT) is introduced. Then, a new method combining CCT with clean technique for multipath LFM signal detection and parameter estimation is presented. Multipath LFM signal parameters, time delays and attenuation factors are estimated precisely with this method, and the correlated cross-item can be avoided effectively. The relevant conclusions are got and verified by the computer simulation.
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