关键词: 三角调频, 时域, 调制域, 相位差分法

Abstract:

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.

Key words: triangular linear frequency modulation;time domain;modulation domain;phase differential algorithm