Time‐domain approach for LFM signal parameter estimation based on FPGA. Issue 13 (1st June 2018) - Zhang, Peng
Abstract : An FPGA‐based parameter estimation method for linear frequency modulation (LFM) signal is proposed. The average frequency value of basic time slice is obtained by using improved time‐domain counting method. Then, frequency values are used for the least‐squares fitting, so as to obtain the sweep rate of LFM signal. Compared to estimation methods based on digital signal processing, the proposed approach can effectively reduce the estimation time. Experimental results show that the slope fitting accuracy of mono‐component LFM signal is better than 99.8% and the processing time is <250 ns.