Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Robust direct data domain processing for MTI
 Klemm, Richard; Nickel, Ulrich; Gierull, Christoph; Lombardo, Pierfrancesco; Griffiths, Hugh; Koch, Wolfgang: Novel radar techniques and applications. Vol.1: Real aperture array radar, imaging radar, and passive and multistatic radar Herts: SciTech Publishing, 2017 ISBN: 9781613532256 ISBN: 9781613532270 ISBN: 9781613532294 ISBN: 9781613532263 S.99133 

 Englisch 
 Aufsatz in Buch 
 Fraunhofer FHR () 
Abstract
Direct data domain spacetime adaptive processing (D3STAP) is an interesting approach for multichannel radar moving target indication. The main difference with respect to conventional stochastic STAP resides in the capability to cancel the interference (both jammers and clutter) using only the information contained in the single range gate under test. Therefore, being implicitly a single snapshot interference cancellation technique, D3STAP shows several advantages compared to stochastic STAP in fast varying interference scenarios, where the availability of secondary data for interference statistics estimation is limited. In this chapter, a novel approach for D3STAP is described. This amelioration overcomes the main limitation of D3STAP in its classical derivation. In fact, target detection performance of D3STAP is severely deteriorated in case of inaccurate knowledge of target parameters, namely direction of arrival (DOA) and Doppler frequency. To overcome this problem, a robust D3STAP (viz. RD3STAP) implementation is shown which takes into account a possible mismatch between nominal and actual target parameters. The approach reformulates the D3STAP problem in the context of convex optimization, and it can be applied to the different implementations of D3STAP, namely forward, backward and forwardbackward methods. In addition to that, an implementation of RD3STAP with dimension reducing transformations is shown which limits the number of degrees of freedom. The effectiveness of the proposed approach is shown both in simulated scenarios and by direct application to real data taken from the experimental multichannel radar system PhasedArray Multifunctional Imaging Radar (PAMIR) developed at FraunhoferInstitute for high frequency physics and radar techniques; in German: FraunhoferInstitut fur Hochfrequenzphysik und Radartechnik (FHR). Finally, possible applications of RD3STAP to multichannel synthetic aperture radar and to target DOA estimation cases are presented.