Title :
Compensation for distorted LFM signal
Author :
Xu, Rongqirii ; Cao, Zhidao ; Liu, Xinggang
Author_Institution :
Dept. of Radio Eng., Harbin Inst. of Technol., China
Abstract :
A compensation method for non-ideal performance of the system using STRETCH processing (or full-deramp), and for modulation nonlinearity of LFM signal is presented. An analysis is developed to show that the effect caused by the non-ideal performance of the system on the signal output is time-invariant, and the effect caused by the nonlinearity of LFM signal on the output is time-variant. A series of simulation results demonstrate the efficiency of the method. Under some conditions, the sidelobe level as high as -5.76 dB may be reduced to -41 dB. If the tolerable sidelobe level is -30 dB, the target size may be extended to 120 m
Keywords :
compensation; electric distortion; frequency modulation; pulse modulation; signal processing; 120 m; 30 dB; 41 dB; STRETCH processing; compensation; distorted LFM signal; full-deramp; linear frequency modulated signal; modulation nonlinearity; nonlinearity; sidelobe level; Chirp modulation; Frequency conversion; Performance analysis; Phase distortion; Phase modulation; Pulse compression methods; RF signals; Radio frequency; Signal analysis; Signal resolution;
Conference_Titel :
Aerospace and Electronics Conference, 1993. NAECON 1993., Proceedings of the IEEE 1993 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-1295-3
DOI :
10.1109/NAECON.1993.290893
