Employees of the Department of Radio Communication Systems and Networks publish the results of their research and information on ongoing projects in numerous articles in peer-reviewed journals, and present at national and international conferences. Some of these publications are available in the form of Open Access, among others, on the website mostwiedzy.pl. To facilitate the search, below we attach a link to the catalog with our publications:
However, the monographs published in recent years, which summarize many years of research and constitute a significant contribution to the development of radiocommunication, deserve special attention. These monographs are available in university libraries and reading rooms, some of them are still on sale by publishing houses. Below is a list of these monographs with brief descriptions.
Kanał radiowy w sieciach WBAN (Radio channel in Body Area Networks)
Sławomir Ambroziak, 2020
[abstract will be added here...]
Propagacja fal radiowych w sieciach 5G/IoT (Radio wave propagation in 5G/IoT networks)
Ryszard Katulski, 2020
[abstract will be added here...]
Badanie i analiza systemów radiolokalizacyjnych do zastosowań specjalnych (Research and analysis of radio location systems for special applications)
Jarosław Sadowski, 2018
This work is dedicated to radio positioning systems, with special emphasis on groundbased solutions, designed for special applications. Systems for special applications should be understood as solutions designed to fulfill expectations of public order services, where precise and reliable positioning has a significant impact on safety and effectiveness of operation.
First the general principles of operation of radio location and radio navigation systems are presented. Theoretical background includes methods of radio signal parameters measurements, which allows getting data connected with positions of mobile user terminals, and selected algorithms of coordinates calculation for distance and distance difference measurement systems. In addition, some measures of the quality of position estimation and the reliability factors for positioning systems are presented.
Next part of this book contains results of investigations on two medium-range radio location systems: the first one is wideband system with spread spectrum (DS-CDMA) while the second is narrowband solution based on carrier phase measurements. In both systems base stations are working in asynchronous mode. Description of these systems includes structure of devices, rules of mobile receivers position calculation and main aspects of digital signal processing and data processing implemented in prototypes of positioning systems. Results of tests and position estimation accuracy evaluation are presented for both systems.
Another two positioning systems, presented in this work, were designed to estimate and track position of persons in indoor environments. In the first solution, position of persons equipped with personal nodes is estimated from results of distance measurements, which are made using CHIRP signals. The second indoor positioning system estimates position of persons using several sources of data, such as inertial sensors, pressure sensors, magnetometers and distances measured by impulse radio UWB modems. Results of real-field tests performed in various buildings and on board passenger ferry during cruise on the Baltic Sea are also presented with position estimation accuracy evaluation for both systems.
Asynchroniczne metody radiolokalizacyjne
Jacek Stefański, 2018
[abstract will be added here...]
Badanie metod i projektowanie usług lokalizacyjnych w sieciach radiokomunikacyjnych (Investigation of methods and design of location services in radiocommunication networks)
Jacek Stefański, 2012
In this monograph selected problems of object location in radiocommunication networks are introduced, especially in cellular networks.
First, new principles for the building and functioning of a wireless coastal cellular distress system based on the infrastructure of cellular networks are presented. On the basis of measurement data, a new method of mobile terminal position estimation in marine conditions is elaborated. This method is more accurate than the method applied in the location platform of mobile network operators.
Next, the accuracy of the measurement of container location in the container terminal is verified. New empirical propagation models for the design of radiocommunication networks in the container environment are elaborated. These models can be applied to objects location estimation in this environment using the RSS (Received Signal Strength) method.
A new method for improving mobile terminal estimation in UMTS (Universal Mobile Telecommunications System) networks, using the phenomenon of multipath propagation, is presented. Analytical and simulation works leading to new LCS (Location Service) algorithmic solutions for existing standards of cellular networks were also carried out. As the result of these works, a new algorithm improving the effectiveness of a location service in asynchronous UMTS networks has been worked out.
An important part of this work is also the methodology of designing and implementing location services in cellular networks. Several location services are elaborated, and some of them have been implemented in real-life mobile networks.
At the end of this work, the rules concerning the operation and the building of a radiolocation system with spread spectrum signals executed in the form of a technology demonstrator are presented. This system represents a significant contribution to the development of domestic location systems which can coexist with radionavigation/radiolocation satellite systems.