TY - JOUR AU - Cai, Xiangming AU - Xu, Weikai AU - Wang, Lin AU - Kolumbán, Géza TI - Design and Performance Analysis of a Robust Multi-Carrier M -Ary DCSK System: A Noise Suppression Perspective JF - IEEE TRANSACTIONS ON COMMUNICATIONS J2 - IEEE T COMMUN VL - 70 PY - 2022 IS - 3 SP - 1623 EP - 1637 PG - 15 SN - 0090-6778 DO - 10.1109/TCOMM.2022.3144276 UR - https://m2.mtmt.hu/api/publication/33611138 ID - 33611138 N1 - Department of Information and Communication Engineering, Xiamen University, Xiamen, China Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, Hungary Cited By :9 Export Date: 6 March 2024 CODEN: IECMB Correspondence Address: Xu, W.; Department of Information and Communication Engineering, China; email: xweikai@xmu.edu.cn LA - English DB - MTMT ER - TY - JOUR AU - Bai, Chao AU - Zhao, Xiao-Hui AU - Ren, Hai-Peng AU - Kolumbán, Géza AU - Grebogi, Celso TI - Double-Stream Differential Chaos Shift Keying Communications Exploiting Chaotic Shape Forming Filter and Sequence Mapping JF - IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS J2 - IEEE T WIREL COMMUN VL - 21 PY - 2022 IS - 7 SP - 4954 EP - 4972 PG - 19 SN - 1536-1276 DO - 10.1109/TWC.2021.3135043 UR - https://m2.mtmt.hu/api/publication/33185899 ID - 33185899 N1 - Cited By :6 Export Date: 6 March 2024 Correspondence Address: Ren, H.-P.; Xi'an Technological UniversityChina; email: renhaipeng@xaut.edu.cn AB - A new Differential Chaos Shift Keying modulation scheme exploiting Chaotic Shape-forming Filter and Sequence Mapping (CSF-SM-DCSK) is being proposed. The new CSF-SM-DCSK system employs a novel sequence mapping rule and includes a data correction module to achieve a good trade-off between the low Bit Error Rate (BER) performance and high transmission rate. It transmits two data streams simultaneously and preserves the simplicity and robustness of DCSK method. Channel one, transmitting a Low Priority Stream (LPS), generates the chaotic carrier by a Chaotic Shape-forming Filter (CSF) at the transmitter and applies a coherent Matched Filter (MF) at the receiver to recover the information. Channel two, transmitting a High Priority Stream (HPS), relies on conventional DCSK modulation, while the reference and information-bearing parts are transmitted simultaneously with orthogonal sine and cosine carriers. This double-stream solution eliminates the need for analog RF delay lines and doubles the data transmission rate. Before feeding the LPS data stream into the modulator, each LPS bit is encoded into a symbol sequence using sequence mapping. This approach, together with the coherent MF reception, equips the LPS channel with an extremely high robustness against channel noise and multipath propagation. To handle every possible redundancy in the received signal and to minimize the possibility of making wrong decisions, a data correction block is also introduced. Initially, a rough estimation of the received HPS DCSK bit is done at the receiver, then this estimation is used to remove the DCSK modulation from the received information-bearing signal. The three inputs of data correction blocks are: (i) the reference and (ii) the information-bearing parts of the received signal in their original form, and (iii) the received information-bearing signal where the DCSK modulation is removed. The data correction block improves the BER performance while the increased channel capacity, enabled by the double-stream approach, improves the spectral efficiency. Analytical expressions are derived to predict the BER performances in additive white Gaussian noise channel for both the LPS and HPS channels. Computer simulations are used to show that the system performance of the CSF-SM-DCSK modulation scheme proposed in this work is superior to that of the already published solutions. In addition to the computer simulations, the new chaos-based wireless communications system has been implemented on a wireless open-access research platform to experimentally demonstrate the feasibility and the superiority of CSF-SM-DCSK. LA - English DB - MTMT ER - TY - JOUR AU - Bai, Chao AU - Ren, Hai-Peng AU - Kolumbán, Géza TI - Double-Sub-Stream M-ary Differential Chaos Shift Keying Wireless Communication System Using Chaotic Shape-Forming Filter JF - IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS J2 - IEEE T CIRCUITS-I VL - 67 PY - 2020 IS - 10 SP - 3574 EP - 3587 PG - 14 SN - 1549-8328 DO - 10.1109/TCSI.2020.2993674 UR - https://m2.mtmt.hu/api/publication/31688690 ID - 31688690 N1 - School of Mechatronic Engineering, Xi'An Technological University, Xi'an, China School of Electronics Information Engineering, Xi'An Technological University, Xi'an, China Faculty of Information Technology and Bionics, Pazmany Peter Catholic University, Budapest, Hungary Shaanxi Key Laboratory of Complex System Control and Intelligent Information, Xi’an University of Technology, Xi’an, 710048, China School of Engineering, Edith Cowan University, Perth, WA 6027, Australia Cited By :30 Export Date: 6 March 2024 Correspondence Address: Ren, H.-P.; School of Electronics Information Engineering, China; email: renhaipeng@xaut.edu.cn AB - An M-ary Differential Chaos Shift Keying modulation using Chaotic Shape-forming Filter (CSF-M-DCSK) is proposed here to transmit two sub-streams with different system performances. The chaotic shape-forming filter is used to generate the chaotic carrier which is modulated according to the DCSK concept. The modulated chaotic signal is demodulated by a coherent matched filter receiver and the maximum likelihood decision rule is used to get the best noise performance. Compared to DCSK and its enhanced versions, the new modulation scheme offers not only better noise and multipath performances but also a higher data rate. The hardware implementation of the proposed method is as simple as that of a conventional communication system. Analytical expressions have been derived for the CSF-M-DCSK Bit Error Rate (BER) and its performance has been evaluated in AWGN and multipath channels by simulations. The new CSF-M-DCSK system has been implemented and successfully tested on a Wireless open-Access Research Platform (WARP). Results of simulations and measurements performed in real application scenarios have proven the feasibility and superiority of CSF-M-DCSK over its competitors. LA - English DB - MTMT ER - TY - JOUR AU - Cai, Xiangming AU - Xu, Weikai AU - Wang, Lin AU - Kolumbán, Géza TI - Multicarrier M-Ary Orthogonal Chaotic Vector Shift Keying With Index Modulation for High Data Rate Transmission JF - IEEE TRANSACTIONS ON COMMUNICATIONS J2 - IEEE T COMMUN VL - 68 PY - 2020 IS - 2 SP - 974 EP - 986 PG - 13 SN - 0090-6778 DO - 10.1109/TCOMM.2019.2957431 UR - https://m2.mtmt.hu/api/publication/31477694 ID - 31477694 N1 - Department of Information and Communication Engineering, Xiamen University, Xiamen, 361005, China Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, 1088, Hungary School of Engineering, Edith Cowan University, Perth, WA 6027, Australia Cited By :23 Export Date: 6 March 2024 CODEN: IECMB Correspondence Address: Xu, W.; Department of Information and Communication Engineering, China; email: xweikai@xmu.edu.cn AB - A new multicarrier M-ary orthogonal chaotic vector shift keying with index modulation (MC-MOCVSK-IM) is presented in this paper. In this design, information bits are conveyed not only by the multiple groups of M-ary information bearing signals, but also by the specific indices of the selected reference signals which depend on the incoming mapped bits. Benefiting from the favorable features of multicarrier modulation, M-ary modulation and index modulation, MC-MOCVSK-IM system is capable to offer higher energy efficiency and spectral efficiency at some expense of hardware complexity. In addition, the analytical bit error rate (BER) expressions of MC-MOCVSK-IM system are derived over additive white Gaussian noise (AWGN) and multipath Rayleigh fading channels. The BER performance comparison between MC-MOCVSK-IM system and other non-coherent chaotic communication systems is carried out to highlight the superiority of MC-MOCVSK-IM system in terms of BER performance. Considering the dramatically increased demand for high-data-rate transmission and the harsh environment of future wireless communication, MC-MOCVSK-IM system shows strong robustness and offers competitive solutions for high-data-rate non-coherent chaotic communication systems. LA - English DB - MTMT ER - TY - GEN AU - Kolumbán, Géza TI - Universal Portable SDE Platforms: Enebling a Revolutionary New Way of Teaching the Theory and Practice of ICT Systems PY - 2019 UR - https://m2.mtmt.hu/api/publication/30970967 ID - 30970967 N1 - előadás LA - English DB - MTMT ER - TY - BOOK AU - Kolumbán, Géza TI - Cyber-Physical and IoT Systems, Biomedical Applications: Emerging Areas Where Brand New ICT Tools and Algorithms Are Required PY - 2019 UR - https://m2.mtmt.hu/api/publication/30970952 ID - 30970952 LA - English DB - MTMT ER - TY - BOOK AU - Kopacz, Zsófia AU - Kolumbán, Géza TI - SDE Concept and Embedded Implementation in ICT Applications: From the Theory to a Working Universal HW Platform C1 - Esztergom PY - 2019 UR - https://m2.mtmt.hu/api/publication/30767756 ID - 30767756 AB - The general trend of our time is that the HW and SW components are completely separated in the latest ICT implementations, the different applications are implemented entirely in SW, and only one universal HW device is used to establish the transformation between the data streams processed and generated in SW on a computing platform and the physical signals measured in the real world. The most important feature of SW implementation is that both the functionality and parameters of a given application can be changed easily in SW. The block diagram of SDE concept is shown in Fig. 1 where the real-world analog signals are shown in red, the green universal RF HW devices perform the transformation between the real-world analog signals and their baseband digital equivalents and all applications are implemented in the SW shown in blue. Fig. 1. Generic block diagram of equivalent BB implementation. The transformations between the RF band-pass and BB low-pass domains are performed in both directions by the Universal RF HW device. Analog RF band-pass signals and their BB equivalents, the complex envelopes, are given in red and blue, respectively. In Figure 1 the computing platform is represented by the blue boxes marked by „SW implementation”. In SDE concept, the universal RF HW transformers are embedded in this computing platform. The computing device and the universal HW transformers together form the universal HW platform.The two key issues are (i) how the minimum sampling rate required by the distorless information processing can be assured and (ii) how the embedded operation, i.e., the smooth transition between the two domains can be achieved. The contribution proposed here will answer these basic questions. The SDE concept exploits the theory of complex envelopes because the complex envelopes assure the use of minimum sampling rate, attainable theoretically, when the information to be processed is carried by bandpass signals. First the talk will survey the theory of complex envelopes including deterministic and random signals, LTI systems. It will be shown how an ICT system working on the bandpass real-world analog signals can be substituted by its digital baseband equivalent. Then the implementation of the universal HW transformers and their embedded operation will be discussed. Finally it will be shown how these SW and HW components can be integrated into one single solution in order to get a universal HW platform which can be used to implement any kind of ICT, data communications and information processing system, entirely in SW. LA - English DB - MTMT ER - TY - CHAP AU - Kolumbán, Géza AU - Krébesz, Tamás István ED - IEEE, null TI - Universal Portable SDE Platform for Teaching the Theory and Practice of ICT Systems T2 - 2019 IEEE International Symposium on Circuits and Systems (ISCAS) PB - IEEE CY - Piscataway (NJ) SN - 9781728103976 T3 - IEEE International Symposium on Circuits and Systems Proceedings, ISSN 0271-4302 PY - 2019 SP - 1 EP - 5 PG - 5 DO - 10.1109/ISCAS.2019.8702408 UR - https://m2.mtmt.hu/api/publication/30684688 ID - 30684688 AB - A universal portable software defined electronics platform developed to teach info-communications systems is proposed here. Because every application is implemented in software, the universal platform is suitable for the implementation and simulation of any kind of communications or measurement systems where the information is carried by band-pass signals. The software defined electronics platform needs only a laptop and two universal software radio peripheral devices, and it can be used everywhere without a laboratory infrastructure. LA - English DB - MTMT ER - TY - CHAP AU - Kolumbán, Géza TI - SDE implementation of chaos-based communications systems T2 - Advances on Nonlinear Dynamics of Electronic Systems PB - World Scientific SN - 9789811201523 T3 - ; 17. PY - 2019 SP - 41 EP - 45 PG - 5 DO - 10.1142/9789811201523_0008 UR - https://m2.mtmt.hu/api/publication/30625081 ID - 30625081 LA - English DB - MTMT ER - TY - GEN AU - Kun, Péter AU - Kolumbán, Géza TI - Concept of Software Defined Electronics PY - 2019 UR - https://m2.mtmt.hu/api/publication/30456398 ID - 30456398 N1 - előadás LA - English DB - MTMT ER -