Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Noise Figure Verification and Optimization of an Undersampled Software Defined Radio Based Radar Receiver for a Phased Array Radar System
 European Microwave Association: 48th European Microwave Conference, EuMC 2018. Proceedings : 2527 September 2018, Madrid, Spain Piscataway, NJ: IEEE, 2018 ISBN: 9782874870514 ISBN: 9782874870507 ISBN: 9781538652855 S.894897 
 European Microwave Conference (EuMC) <48, 2018, Madrid> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer FHR () 
Abstract
This paper aims to study practical applicable measurement and optimization methods of the noise figure of an undersampled radar receiver including the influence of aliasing caused by the analogdigitalconversion and the followed digital signal processing. For this, a measurement method is implemented that regards the convolution of noise components from adjacent frequency bands into the useful band which occurs through a weak bandlimiting analog filter. A comparison with the common YFactorMethod noise figure measurement method for only the analog frontend is made and it is shown why this method is not suitable for undersampled systems. The results have shown that the weak slope steepness of the used analog bandpass filter leads to a degradation of the noise figure in the upper half of the receiving frequency band that could not be determined by common measurement methods.