Title :
An algorithm to improve range estimation for frequency-modulation continuous-wave (FM-CW) radar level gauge
Author_Institution :
Dept. of Power Eng., Chongqing Commun. Inst., China
Abstract :
In FM-CW radar level gauge, fast Fourier transform (FFT) is usually used to coarsely estimate the beat signal´s frequency. Algorithms for the frequency´s fine-estimation are also essential to improve range estimation. So, a method of estimating the beat signal´s frequency is proposed based on discrete Fourier transform (DFT) and interpolation. Simulation results show that the method is adaptive to noise and has high computational accuracy and small computation necessary, which makes it suitable for an online use of frequency-estimation.
Keywords :
CW radar; FM radar; discrete Fourier transforms; distance measurement; frequency estimation; gauges; interpolation; microwave devices; DFT; FFT; FM-CW; beat signal frequency estimation; discrete Fourier transform; fast Fourier transform; frequency-modulation continuous-wave; interpolation; microwave radar level gauge; range estimation; Chirp modulation; Discrete Fourier transforms; Frequency estimation; Interpolation; Microwave generation; Radar antennas; Receiving antennas; Signal generators; Transmitters; Voltage-controlled oscillators;
Conference_Titel :
Information Acquisition, 2004. Proceedings. International Conference on
Print_ISBN :
0-7803-8629-9
DOI :
10.1109/ICIA.2004.1373401