Karol Klincewicz

Bio: Karol Klincewicz is an academic researcher from Warsaw University of Technology. The author has contributed to research in topics: Passive radar & Bistatic radar. The author has an hindex of 5, co-authored 12 publications receiving 42 citations.

Doppler only localization in GSM-based passive radar The concept and simulation results

Abstract: The localization in a classical multistatic passive radar is based on finding bistatic ellipsoid crossing with at least three pairs of transmitter-receiver. The localization accuracy is dependent on the geometry and bandwidth of the illumination signal. For narrow band signals like GSM cellular phone transmission the bistatic range resolution is very poor, in a range of several kilometers. The paper presents an alternative solution - exploitation of Doppler information and localization based on Doppler-only measurements. Because there were 4 unknowns (in 2-D localization: two spatial and to velocity components) or 6 unknowns (in 3D localization) it is necessary to have at least 4 or 6 bistatic measurements to localized the target. The paper presents the theory of Doppler-only target localization in GSM passive radar, related simulation results and accuracy considerations.

Doppler only localization in GSM-based passive radar

Abstract: The localization in a classical multistatic passive radar is based on finding bistatic ellipsoid crossing with at least three pairs of transmitter-receiver. The localization accuracy is dependent on the geometry and bandwidth of the illumination signal. For narrow band signals like GSM cellular phone transmission the bistatic range resolution is very poor, in a range of several kilometers. The paper presents an alternative solution - exploitation of Doppler information and localization based on Doppler-only measurements. Because there were 4 unknowns (in 2-D localization: two spatial and to velocity components) or 6 unknowns (in 3D localization) it is necessary to have at least 4 or 6 bistatic measurements to localized the target. The paper presents the theory of Doppler-only target localization in GSM passive radar, related simulation results and accuracy considerations.

Experimental results of DANIEL-35 SAR system tests

Abstract: This paper presents results of DANIEL-35 Synthetic Aperture Radar (SAR) system tests carried out recently by the Warsaw University of Technology (WUT) together with the Air Force Institute of Technology (AFIT), Poland The DANIEL-35 system is a high resolution (up to 15cm), compact SAR radar operating in the 35GHz band The system has been developed under the framework of a μSAR project founded by the Polish National Centre for Research and Development (NCBiR) The goal of this project is to develop a multiplatform SAR system dedicated for ground surface monitoring The preliminary results obtained from the various system tests, including recent trials where a small plane was used as a radar carrier, are presented in this paper

Multistatic Wireless Fidelity Network Based Radar – Results of the Chrcynno Experiment

Abstract: This paper presents the theory and experimental result of passive radar using WIFI transmitters as illuminators of opportunity. As a result of experiments conducted on 17th August 2013 at airfield Chrcynno a Cessna C208 airplane was detected using multistatic passive radar system based on low power signal from WIFI network nodes, which were acting as non-cooperative illuminators of opportunity. In the experiment the 3 wireless access points (AP) were communicating with each other and illuminating the radar scene (airfield). The direct reference and reflected (surveillance) signals have been acquired and processed using specially developed algorithm presented in the paper. After signal processing using Passive Coherent Location methods the target has been detected. This paper describes in details the algorithms and the results of the experiment for the multistatic passive radar based on the WIFI signal.

Supersonic target detection in passive radar

Abstract: The detection of supersonic targets in passive radar is a challenge due to the high speed and acceleration of the targets. In the classical approach, where the crossambiguity function is used, the integration time is limited by the range and Doppler migration. In this paper the application of the extension of the crossambiguity function to the 3-dimensional range-Doppler-acceleration is presented. The target of interest was a supersonic target - a sounding rocket launched by the Student Astronautical Group of the Warsaw University of Technology. As an illumination signal the DVBT-signal was selected.

35 GHz FMCW drone detection system

Abstract: This paper presents an experimental system dedicated for the detection and tracking of small aerial targets such as Unmanned Aerial Vehicles (UAVs) in particular small drones (multirotors). The system was proposed in response to increasing drone popularity and the related threats. The hardware and software parts of the system are covered, including the analogue front-end, FPGA based pre-processing and PC based processing, detection and tracking. Real life trials are described with promising results provided. Further research on the subject is proposed.

Experimental investigation on target detection and tracking in passive radar using long-term evolution signal

Abstract: This study examines the feasibility of the recently deployed wireless communication system, namely, long-term evolution (LTE), for passive radar applications. Specifically, the capability of the system to detect and track a ground moving target is analysed. A theoretical analysis is conducted on the actual LTE signal transmitted in the atmosphere, followed by field experimentation using a moving vehicle with different bistatic geometries. The experiment examines the capability of an LTE-based passive radar to detect a moving vehicle and then track it using a standard Kalman filter. Results show that the LTE-based passive radar can detect and track the ground vehicle at different locations, speeds and trajectories, and localise it in the XY-axis coordinate.

VHF Cross-Range Profiling of Aerial Targets Via Passive ISAR: Signal Processing Schemes and Experimental Results

Abstract: The possibility of obtaining cross-range profiles of aerial targets is contemplated in this paper by applying inverse synthetic aperture radar (ISAR) techniques against FM-based passive radar data. The considered application is shown to pose a number of limitations, mostly related to the very long coherent processing interval required to attain a reasonable cross-range resolution. To mitigate such limitations, a suitable two-stage ISAR processing scheme is proposed for the estimation of the target motion induced phase history and its compensation. The results are shown against experimental data sets collected by a very high frequency (VHF) band passive radar receiver developed at Sapienza University of Rome. This allows to demonstrate the effectiveness of the proposed approach that provides the FM-based passive radar with advanced capabilities for air traffic surveillance applications.

C-band SAR radar trials using UAV platform: Experimental results of SAR system integration on a UAV carrier

Abstract: In this paper the experimental results of C-band synthetic aperture radar (SAR) system integration on an unmanned aerial vehicle (UAV) are shown. The goal of the presented trials was to check the capabilities and limitations of the SAR system in UAV applications. The trials were conducted with a UAV system developed and operated by the Portuguese Air Force Academy (PAFA) using a compact SAR system, named SARENKA, developed by the Warsaw University of Technology (WUT).

WiFi-based PCL for monitoring private airfields

Abstract: In recent years, a number of studies have looked at the use of passive coherent location (PCL) radar systems for short-range surveillance applications [1]–[8]. In such applications, the transmitters for mobile personal communication and network connection have been successfully exploited as illuminators of opportunity; these include the base stations of the global system for mobile communications, universal mobile telecommunications system, worldwide interoperability for microwave access (WiMAX), and long-term evolution (LTE).