Title :
The ambiguity function of PN-chirp pulse signal
Author :
Liu, Jing ; Zhao, Huichang ; Zhu, Yanping
Author_Institution :
Dept. of Electron. Eng. & Optoelectron. Technol., Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
The power spectral density function and the ambiguity function(AF) properties of Combination of Chirp Modulation and Pseudonoise Phase Modulation (PN-chirp) pulse signal is analyzed. According to the AF definition of a given finite energy signal, the AF of PN-chirp signal is deduced, and the autocorrelation function of the signal is also obtained. The AF of PN-chirp signal and Pseudonoise Phase Modulation signal are contrasted to show the difference between the two pulse signals. Simulation results show that the AF of PN-chirp signal can be obtained by shearing an angle of the AF of Pseudonoise Phase Modulation signal; Compared with Pseudonoise Phase Modulation signal, PN-chirp signal has a better range accuracy and range resolution. The Doppler sensitivity is also significantly improved.
Keywords :
Doppler radar; chirp modulation; correlation methods; phase modulation; radar signal processing; Doppler sensitivity; PN-chirp pulse signal; ambiguity function; autocorrelation function; chirp modulation; power spectral density function; pseudonoise phase modulation signal; Correlation; Density functional theory; Doppler effect; Doppler radar; Phase modulation; Signal resolution;
Conference_Titel :
Information Science and Technology (ICIST), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-9440-8
DOI :
10.1109/ICIST.2011.5765309
