[射频]Signal Model and Linearization for Nonlinear Chirps in FMCW Radar SAW-ID Tag Request

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 54, NO. 4, APRIL 2006 1477 :CkR4J!m3  
Signal Model and Linearization for Nonlinear Chirps jle%|8m&@  
in FMCW Radar SAW-ID Tag Request "X{aS}  
Stefan Scheiblhofer, Student Member, IEEE, Stefan Schuster, Student Member, IEEE, and e=n{f*KG`  
Andreas Stelzer, Member, IEEE F`BgKH!  
Abstract—In this paper, we present a frequency-modulated eFj6p
<  
continuous-wave radar interrogation concept, based on direct m!#)JFe67  
digital synthesis (DDS), that operates without the commonly R|)2Dg  
necessary high-frequency DDS reference oscillator. As the generated 6`4W,  
frequency sweeps are nonlinear, standard Fourier transform r0g/:lJi  
methods for baseband signal evaluation cannot be applied directly. 97]a-)SA  
We show the corresponding signal model, derive a linearization nvs}r%1'5  
concept on the basis of resampling, and demonstrate the linearization 0nD=|W\@{  
algorithm on simulated data, as well as on real wireless [#>$k 6F*  
interrogations of surface acoustic-wave sensors. ~ S?-{
X+  
Index Terms—Direct digi .. 2htA7V*dD  
!,6v=n[Nz  

未注册仅能浏览部分内容，查看全部内容及附件请先 登录 或 注册

hehe