Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Spatially resolved subNyquist sensing of multiband signals with arbitrary antenna arrays
 Sellathurai, M. ; Institute of Electrical and Electronics Engineers IEEE; IEEE Signal Processing Society: IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016 : Edinburgh, 0306 July 2016 Piscataway, NJ: IEEE, 2016 ISBN: 9781509017492 ISBN: 9781509017508 S.761765 
 International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) <17, 2016, Edinburgh> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer IIS () 
 Richtungsschätzung (DoA); compressed sensing 
Abstract
In recent years it has been shown that wideband analog signals can be sampled significantly below the Nyquist rate without loss of information, provided that the unknown frequency support occupies only a small fraction of the overall bandwidth. The modulated wideband converter (MWC) is a particular architecture that implements this idea. In this paper we discuss how the use of antenna arrays allows to extend this concept towards spatially resolved wideband spectrum sensing by leveraging the sparsity in the angularfrequency domain. In our system each antenna element of the array is sampled at a subNyquist rate by an individual MWC block. This results in a tradeoff between the number of antennas and MWC channels per antenna. We derive bounds on the minimal total number of channels and minimal sampling rate required for perfect recovery of the 2D angularfrequency spectrum of the incoming signal and present a concrete reconstruction approach. The proposed system is applicable to arbitrary antenna arrays, provided that the array manifold is ambiguityfree.