Institution
Saab AB
Company•Thun, Switzerland•
About: Saab AB is a company organization based out in Thun, Switzerland. It is known for research contribution in the topics: Antenna (radio) & Signal. The organization has 862 authors who have published 928 publications receiving 8807 citations. The organization is also known as: Saab AB & Svenska Aeroplan AB.
Topics: Antenna (radio), Signal, Radar, Radar imaging, Antenna rotator
Papers published on a yearly basis
Papers
More filters
•
09 Jul 2013TL;DR: The Smoothed Probabilistic Data Association Filter is presented, which shows that the root mean squared error performance of SmPDAF is significantly better than PDAF under comparable track loss performance.
Abstract: This paper presents the Smoothed Probabilistic Data Association Filter (SmPDAF) that attempts to improve the Gaussian approximations used in the Probabilistic Data Association Filter (PDAF). This is achieved by using information from future measurements. Newer approximations of the densities are obtained by using a combination of expectation propagation, which provides the backward likelihood information from the future measurements, and pruning, which uses these backward likelihoods to reduce the number of components in the Gaussian mixture. Performance comparison between SmPDAF and PDAF shows us that the root mean squared error performance of SmPDAF is significantly better than PDAF under comparable track loss performance.
•
16 Jun 2017TL;DR: In this paper, the authors propose a method for authenticating software by defining a set of parameters to use for trace mapping the software, wherein the set of parameter represents the software functionality when executed.
Abstract: The present invention relates to a method for authenticating software. The method comprises defining 41 a set of parameters to use for trace mapping the software, wherein the set of parameters represents the software functionality when executed. The method further comprises: a) creating 42 a trusted fingerprint that is created by trace mapping the software using the set of parameters when executed in a trusted environment; b) creating 43 an operating fingerprint that is created by trace mapping the software using the set of parameters when executed in an operating environment; c) comparing 44 the operating fingerprint with the trusted fingerprint, and identifying 45 any difference between the trusted fingerprint and the operating fingerprint; and d) when said operating fingerprint is non-identical with the trusted fingerprint, initiating 46 predefined action(s) in response to the identified differences between the trusted fingerprint and the operating fingerprint.
•
29 Mar 2005TL;DR: In this paper, a method for mapping a target scene by means of scanning radar utilizing the Doppler effect that arises in the event of movement between radar and target scene, where the movement of a platform upon which the radar's antenna is mounted is calculated utilizing navigation data obtained for the platform.
Abstract: The invention relates to a method for mapping a target scene by means of scanning radar utilizing the Doppler effect that arises in the event of movement between radar and target scene, where the movement of a platform upon which the radar's antenna is mounted is calculated utilizing navigation data obtained for the platform. The method can generate high-resolution radar images in an almost forward-looking application. This is achieved by introducing an approach compensation (7), in which the signal quantity received by the radar which is related to transmitted pulses is transformed pulse by pulse to a corresponding movement-corrected signal quantity by displacement in time and phase, dependent upon the platform's movement along an imaginary platform movement directed in such a way that the antenna's momentary direction is essentially 90° to the direction of the movement of the imaginary platform.
•
05 Nov 2008TL;DR: In this paper, an ignition and delay circuit of an ammunition unit for time controlled delay of the initiation of an electric blasting cap (8) is presented. But the delay is dependent on the type of ammunition in question.
Abstract: The present invention relates to an ignition and delay circuit of an ammunition unit for time controlled delay of the initiation of an electric blasting cap (8). The ignition and delay circuit comprises a piezo electric device (1) generating electrical energy when hitting a target, an energy storing device (4, 5) storing the energy generated by the piezo electric device (1) and a delay device (6) supplied by the energy storing device (4, 5) and controlling the initiation of the electric blasting cap (8). The object of the invention is to obtain a more flexible ignition and delay circuit easy to adapt to different ammunition types, different kinds of operation, different kinds of environments and so on. According to the invention a programmable micro processor (6) is provided supplied by the energy storing device and arranged to control the delay of the initiation in dependence of at least the type of ammunition in question.
•
10 Sep 2019TL;DR: In this paper, a method for detecting a horizontally buried linear object having a longitudinal extension is presented. But the method is limited to the detection of a single linear object and does not cover other objects.
Abstract: The present disclosure relates to a method for detecting a horizontally buried linear object, the horizontally buried linear object having a longitudinal extension. The method comprises moving (S10), with a flying platform comprising a radar for synthetic aperture radar, SAR, vertical imaging, along a trajectory corresponding to a synthetic aperture. The method further comprises transmitting (S20) and receiving radar signals while moving along the trajectory corresponding to the synthetic aperture. The method also comprises forming (S30) a SAR image based on collected data representing radar signal reflections received from the ground. The method additionally comprises detecting (S40) one or more features in the formed SAR image relating to the horizontally buried linear object. Said trajectory is oriented in a direction substantially perpendicular to an expected orientation of the longitudinal extension of the horizontally buried object and traversing the horizontally buried object.The present disclosure further relates to corresponding computer programs, radar systems, flying platforms and antenna systems.
Authors
Showing all 863 results
Name | H-index | Papers | Citations |
---|---|---|---|
Christer Larsson | 64 | 272 | 12916 |
Brian L. Wardle | 48 | 281 | 9394 |
Per Karlsson | 47 | 191 | 9697 |
Torbjörn Wigren | 30 | 281 | 3996 |
Per Lötstedt | 28 | 109 | 2960 |
Bengt Andersson | 27 | 92 | 2171 |
Carl Gustafson | 17 | 34 | 1035 |
Jan Torin | 15 | 41 | 902 |
Per-Johan Nordlund | 14 | 26 | 2738 |
Mikael Petersson | 13 | 51 | 446 |
Torbjorn M.J. Nilsson | 12 | 31 | 923 |
Tonny Nyman | 12 | 25 | 546 |
Kristian Amadori | 12 | 28 | 419 |
Torleif Martin | 11 | 33 | 387 |
Johan Fredriksson | 11 | 28 | 446 |