Nonlinearity Correction Method in FMCW Laser Range Finder 


Vol. 38,  No. 4, pp. 351-358, Apr.  2013


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  Abstract

We propose a correction method of nonlinear frequency sweep in an FMCW(Frequency Modulated Continuous Wave) laser range finder. FMCW laser range finder requires linear frequency sweep for high resolution, and nonlinear frequency sweep makes the system performance degrade. In general, VCO(Voltage Controlled Oscillator) which is a component used for frequency modulation in FMCW method has nonlinear property. To correct the nonlinear frequency sweep, we utilize an auxiliary delay structure for generating trigger signal of ADC(Analog to Digital Converter). Because the trigger signal has same rate of change with the beat signal, the nonlinearity of the beat signal can be corrected. the experimental results show that the proposed method effectively eliminates the nonlinear frequency sweep problem and enhances the system performance.

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  Cite this article

[IEEE Style]

S. Jung, S. R. Lee, M. A. Jeong, C. Park, "Nonlinearity Correction Method in FMCW Laser Range Finder," The Journal of Korean Institute of Communications and Information Sciences, vol. 38, no. 4, pp. 351-358, 2013. DOI: .

[ACM Style]

Soo-Yong Jung, Seong Ro Lee, Min A Jeong, and Chang-Soo Park. 2013. Nonlinearity Correction Method in FMCW Laser Range Finder. The Journal of Korean Institute of Communications and Information Sciences, 38, 4, (2013), 351-358. DOI: .

[KICS Style]

Soo-Yong Jung, Seong Ro Lee, Min A Jeong, Chang-Soo Park, "Nonlinearity Correction Method in FMCW Laser Range Finder," The Journal of Korean Institute of Communications and Information Sciences, vol. 38, no. 4, pp. 351-358, 4. 2013.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880