A New Method for Parameters Estimation of LFM Signal Based on DAF at Low SNR
低信噪比下基于DAF的LFM信号参数估计新方法

Discrete Ambiguity Function (DAF) is used to estimate parameters of LFM signal after improving SNR based on recomposing sequences. This method does not add the number of the sampling data and ensures real-time processing, but can improve the precision of parameters estimation and reduce the need for input Signal-to-Noise Ratio(SNR) in order to estimating exactly. This paper analyses theoretically its basic principle and performance. Simulation results prove the validity of this method.