Fundamental Limitations of Crystal Oscillator Tolerances on FMCW Radar Accuracy

被引：0

作者：

El-Shennawy, Mohammed ^{[1
]}

Al-Qudsi, Belal ^{[1
]}

Joram, Niko ^{[1
]}

Ellinger, Frank ^{[1
]}

机构：

[1] Tech Univ Dresden, Chair Circuit Design & Network Theory, D-01062 Dresden, Germany

来源：

2016 GERMAN MICROWAVE CONFERENCE (GEMIC) | 2016年

关键词：

Phase locked loops; oscillators; radar; chirp;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Crystal oscillators (XOs) are widely used in fractional-N phase locked loops (Frac-N PLLs) as reference frequency sources due to their good phase noise performance. However, these XOs have manufacturing tolerances in the range of few tens of parts per million (ppm). When a Frac-N PLL is used in frequency modulated continuous wave (FMCW) radar applications, the XO accuracy affects the frequency and timing accuracies of the radar chirps and so it directly affects the distance measurement accuracy. In this work, the fundamental limits of XO tolerance on distance measurement accuracy of FMCW radars are discussed and modelled. Moreover, an FMCW radar system hardware prototype is developed. Measurement results are in good agreement with the expectations of the simulation model.

引用

页码：297 / 300

页数：4