摘要
线性调频信号是雷达中常采用的一种脉冲压缩信号。提出了一种新的线性调频信号数字产生方法,该方法是利用两个二阶无限脉冲响应滤波器进行计算产生信号;分析和评价了用该方法产生带宽为15MHz、脉宽为20$s的线性调频信号,并进行了幅度误差补偿。实验结果及分析表明:该产生方法具有计算复杂度低、无需大容量存储器且实现容易的特点。
The Linear Frequency Modulated (LFM) signal is a popular pulse compression radar signal.A new digital method for LFM signal generated is proposed.The LFM signal can be generated by means of two second-order infinite impulse response filters (IIR) computing.At the same time the LFM signal generated in this way with 15 MHz bandwidth and 20 μs pulse width is analyzed and evaluated.The amplitude error of the signal is compensated.The experiment results and analysis show that the merits of the method are low computational capability,very low memory and easy realization.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第25期69-71,共3页
Computer Engineering and Applications
基金
国家教育部博士点基金资助~~
关键词
线性调频信号
脉冲压缩
无限脉冲响应滤波器
匹配滤波器
直接数字合成技术
Linear Frequency Modulated signal
pulse compression
Infinite Impluse Response filter
matched filter
Direct Digital Synthesizer(DDS)