Ł. Podkalicki

Bio: Ł. Podkalicki is an academic researcher. The author has contributed to research in topics: Fidelity & Radar. The author has an hindex of 1, co-authored 1 publications receiving 6 citations.

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.

Universal RFSoC-based Signal Recorder for Radar Applications

Abstract: The paper shows a concept and development of a universal signal recorder for radar purposes. The recorder is based on RFSoC chip by Xilinx, which is placed on ZCU111 evaluation board. The recorder is capable of acquiring signals from 8 channels synchronously at a frequency of up to 4 GHz. The streaming of the data to a computer is realized using a 10 Gbit ethernet connection using the open-source FADE protocol.

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.

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).

Duty factor impact on WIFIRAD radar image quality

Abstract: WIFIRAD — a passive radar demonstrator developed at the Warsaw University of Technology — utilizes signals from the WIFI networks as sources of illumination. As these WIFI signals are not continuous and the duty factor depends on the amount of transmitted data by the WIFI network nodes, authors focused on an impact of the duty factor on the quality of the detections obtained by the WIFIRAD. This paper contains a description of the illuminating signal, a short analysis of an impact of the duty factor on a shape of the cross-ambiguity function and the results of the experiments. The experiment was planned to show how the amount of the traffic in the WIFI network impacts duty factor and how it impacts crossambiguity function obtained by the WIFIRAD. The set of experiments in the bistatic configuration were conducted in an outdoor environment using a 2-node WIFI network, the WIFIRAD as radar and a car as a target. The main goal of this paper is to show how the amount of the illuminating signal impacts the range-Doppler matrix.

Drone RCS estimation using simple experimental measurement in the WIFI bands

Abstract: In this paper, authors will describe simple experiment which goal is to estimate of a radar cross section (RCS) of a drone. Drones are targets very small in size and RCS. During the design of the passive or active systems dedicated for drone detection, the RCS value of potential targets is not a priori known. So far there were publications related to simulated results of a drone or its parts. The measurements are performed in the 2.4 GHz WIFI band.

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.