Title :
Improving range precision of LFMCW radar based on frequency domain up-sampling-interpolating method
Author :
Zhang, Rongquan ; Huang, Yulin ; Yang, Jianyu ; Xiong, Jintao
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
The paper presents a method based on the frequency domain up-sampling-interpolating method (FDUSIM) of the beat signal spectrum to improve the range precision of LFMCW radar. Simulation indicates that this method can effectively decrease the ranging error caused by the inherent frequency domain sampling spacing of FFT, and can also accurately reflect the beat signal spectrum characteristic of multiple different range targets in the whole frequency domain. This method overcomes the limitation of the chirp-Z or zoom-FFT method which can only be used in local frequency domain thinning. Furthermore, the calculation of this method can be decreased considerably compared with the adding zeros FFT, which has the same frequency domain sampling intervals as the FDUSIM.
Keywords :
CW radar; FM radar; fast Fourier transforms; frequency-domain analysis; interpolation; radar signal processing; signal sampling; FMCW radar; adding zeros FFT; beat signal spectrum; frequency domain sampling intervals; frequency domain thinning; frequency domain up-sampling-interpolating method; linear frequency modulation continuous wave radar; Chirp modulation; Delay effects; Frequency domain analysis; Frequency measurement; Information analysis; Paper technology; Radar; Sampling methods; Signal processing algorithms; Signal resolution;
Conference_Titel :
Communications, Circuits and Systems, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9015-6
DOI :
10.1109/ICCCAS.2005.1495226
