多线性调频信号参数估计及DSP实现

Parameter Estimation of Multiple LFM Signals and Implementing with DSP

为实现多线性调频信号参数的快速准确估计,运用模糊函数和Radon变换的性质,提出以信号分数阶自相关实现模糊函数快速计算,并对分数阶自相关进行Radon变换,结合自适应滤波的方法来估计多线性调频信号的调频斜率,在C6701 EVM板上的仿真实验表明,算法在低信噪比下具有优良的参数估计性能,计算效率高。

To realize a fast and accurate parameter estimation of multiple linear frequency modulated signals, using the property of ambiguity function and Radon transform, the paper presents a fast algorithm for estimation chirp rates of multiple LFM signals by ambiguity function calculated by fractional autocorrelation, and by Radon transform. The result of simulation on the evaluation module board of TMS320C6701 shows that the algorithm has a better parameter performance and high computing efficiency under the low SNR.