摘要
为精确测量三角调频脉冲信号参数,文中提出了一种联合时域、调制域测量的方法。时域分析时采用统计脉冲信号包络数值的方法估计判决门限,以实现脉冲个数、脉冲宽度等时域参数的测量。基于时域参数测量结果,调制域分析时采用相位差分法得到信号的瞬时频率曲线,进而获得准确的线性度等调制域参数。仿真结果表明,高信噪比下,该方法比现有其他方法运算量少、误差小。
To accurately measure the parameters of triangular linear frequency modulation pulse signal,this paper proposes a new measurement approach which combines time domain and modulation domain methods. Firstly,we estimate the decision threshold based on the statistic value of the signal＇s envelope in time domain. The pulse number,pulse width and other time domain parameters are measured by using this threshold. And then on the basis of the time domain results,the frequency curve is obtained using phase differential algorithm,which yields a more accurate linearity measure in modulation domain. Simulations show that the proposed method is more computational effective and has lower measurement errors under high signal-to-noise ratio background than the existing approaches.
出处
《电子科技》
2015年第2期154-157,163,共5页
Electronic Science and Technology
基金
国家重大科学仪器设备开发专项基金资助项目(2012YQ20022405)
关键词
三角调频
时域
调制域
相位差分法
triangular linear frequency modulation
time domain
modulation domain
phase differential algorithm
