Article
Engineering, Electrical & Electronic
Haipin Chen, Pingping Chen, Shaohao Wang, Songlin Lai, Riqing Chen
Summary: In this paper, a reference-modulated permutation index differential chaos shift keying (RM-PI-DCSK) scheme is proposed for multipath fading channels. The scheme utilizes the quasi-orthogonal property between different permutated chaotic signals to suppress inter-sequence interference and recover desired information. The results show that the proposed RM-PI-DCSK achieves a performance gain of 3 dB over conventional PI-DCSK, especially in high-delay-spread channels.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Bingrui Wang, Haoyu Chen, Zhaopeng Xie, Xiaopu Ma, Ziqiang Zhu
Summary: In this paper, a permutation index differential chaos shift keying with noise reduction (NR-PI-DCSK) is proposed to reduce the negative impact of additive noise and fading interference. The proposed scheme generates beta/R chaotic samples as the reference sequence, which is permuted and used to carry the data. By correlating and averaging these chaotic segments at the receiver, the variance of noise and fading can be greatly reduced, leading to improved performance. The analytical BER expressions for multipath fading channels are derived and verified through simulations. Results show that the NR-PI-DCSK achieves up to 3 dB performance gain compared to the conventional PI-DCSK in different wireless fading channels. The proposed scheme also demonstrates performance advantages in a typical UWB channel. Moreover, it has similar complexity to conventional schemes, making it a promising candidate for low-cost short-range IoT communications.
Article
Telecommunications
Sujie Liu, Pingping Chen, Guanrong Chen
Summary: The proposed DPI-DCSK modulation scheme offers an efficient alternative for chaos-based wireless communication, outperforming traditional PI-DCSK in terms of transmission energy utilization and performance gain. Theoretical analysis and simulation results demonstrate the performance advantage of DPI-DCSK over PI-DCSK in multipath Rayleigh fading channels and practical ultra-wideband channels.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Mathematics, Interdisciplinary Applications
Doan Thi Que, Nguyen Xuan Quyen, Thang Manh Hoang, Christos Volos, Stevan Berber
Summary: This paper investigates a chaotic communication system called 2T2R-IDCSK, highlighting the differences in correlation characteristics between conventional and time-reversed chaotic sequences. The system's BER performance over an AWGN channel is analyzed considering the correlation effect, showing that 2T2R-IDCSK performs worse under this effect but still outperforms conventional 2x2 MIMO-DCSK system significantly.
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
(2021)
Article
Telecommunications
Zixian Lin, Weikai Xu, Haixin Sun, Lin Wang
Summary: In this paper, a hybrid DCSK scheme combining cyclic shift keying and code index modulation (CSK-CIM-DCSK) is proposed to improve data rate and BER performance. The analytical BER expressions of the CSK-CIM-DCSK are derived and validated through simulations. The results show that the proposed scheme outperforms DCSK with code index modulation (CIM-DCSK) in terms of BER performance.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Computer Science, Information Systems
Peng Kang, Ziqiang Zhu, Zhijian Lin, Pingping Chen, Yong Li
Summary: In this letter, a scheme combining pulse position modulation (PPM) and permutation index differential chaos shift keying (PI-DCSK) modulation is proposed to improve data rate and performance. The proposed scheme is shown to outperform existing DCSK-based schemes, and its superiority and feasibility are demonstrated in multipath Rayleigh fading channels and typical ultra-wideband channels.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yunye Li, Yi Fang, Lin Dai, Pingping Chen
Summary: This letter investigates the performance of protograph-coded reference reused differential chaos shift keying (DCSK) systems in order to improve transmission reliability. The traditional receiver for protograph-coded DCSK does not fully utilize the chaotic reference signals, leading to subpar error performance. To address this, a new receiver architecture called weighted reference estimation and iterative decoding (WRE-ID) is proposed, providing universal performance improvement over multipath fading and additive white Gaussian noise channels. The WRE algorithm is introduced to more accurately estimate the reference signal for calculating log-likelihood ratio (LLR), and iterative weight recalculation using extrinsic information from the decoder is employed. Analytical and simulated results demonstrate that the proposed WRE-ID-aided receiver consistently outperforms traditional receivers in reference reused DCSK systems, making it highly promising for high-rate and high-reliability wireless applications.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Doan Thi Que, Nguyen Xuan Quyen, Thang Manh Hoang
Summary: Improved-differential chaos-shift keying (I-DCSK) with time-reversed chaotic sequences shows good performance in terms of bit-error-rate (BER) and spectral efficiency, especially in land mobile satellite applications. The differences in cross-correlation characteristics between time-reversed and conventional chaotic sequences are highlighted in the study on BER performance of the I-DCSK system.
PHYSICAL COMMUNICATION
(2021)
Article
Telecommunications
Xiangming Cai, Weikai Xu, Shaohua Hong, Lin Wang
Summary: This paper proposes a non-coherent discrete W transform based index-keying M-ary differential chaos shift keying (DWT-IK-MDCSK) system to address the high PAPR and high-data-rate transmission demands. The system utilizes multiple chaotic signals and their Hilbert transforms to convey information-bearing signals, extended by index-keying discrete W vectors for improved data rate. Analytical BER expressions over AWGN and Rayleigh fading channels are provided, with simulation results demonstrating lower PAPR and better BER performance compared to competitors.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Yi Fang, Junming Zhuo, Huan Ma, Shahid Mumtaz, Yonghui Li
Summary: We propose a new index-modulation-aided differential chaos shift keying (DCSK) system, the CTIM-DCSK system, that utilizes frequency and time resources for high-data-rate transmissions. The system uses orthogonal sinusoidal carriers to transmit reference-chaotic and information-bearing signals, while the frequency and time resources are used as indices for additional information bits. The proposed CTIM-DCSK system improves bit error rate (BER) performance and complexity reduction by using time slots to convey the same index bits. Noise reduction methods at the receiver further enhance BER performance. The theoretical BER expressions are derived and compared with existing counterparts, confirming the accuracy and advantage of the proposed CTIM-DCSK system. Therefore, it is a competitive candidate for low-complexity Internet-of-Things applications.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Huan Ma, Yi Fang, Pingping Chen, Yonghui Li
Summary: In this paper, two reconfigurable intelligent surface-aided M-ary frequency-modulated differential chaos shift keying (RIS-M-FM-DCSK) schemes are proposed. The RIS is utilized either as a transmitter or a relay to incorporate M-ary phase-shift-keying (M-PSK) symbols into the FM chaotic signal for information transmission. The proposed system does not require channel state information, and theoretical expressions for bit error rates (BERs) are derived and verified through simulations. The RIS-M-FM-DCSK system is a promising alternative for wireless communication networks with its advantages of low cost, low power, and high reliability.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Zhaofeng Liu, Hing Cheung So, Lin Zhang, Xiao Peng Li
Summary: This paper addresses the receiver design problem for OFDM-DCSK communication systems, proposing dimensionality reduction and chaotic demodulation techniques for noise reduction and information decoding. The proposed approach outperforms conventional methods in terms of BER and error performance in both AWGN and impulsive noise environments.
Article
Telecommunications
Xiangming Cai, Weikai Xu, Shaohua Hong, Lin Wang
Summary: The TCS-DCSK system eliminates the reference signal traditionally used in differential chaos shift keying technology, improving energy efficiency and outperforming competitors. Additionally, under additive white Gaussian noise and multipath Rayleigh fading channels, the TCS-DCSK system demonstrates superior bit error rate performance.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Telecommunications
Gang Zhang, Rongcai Lai, Zhongjun Jiang
Summary: This paper proposes a novel carrier phase and code index modulation differential chaos shift keying system (CP-CI-DCSK) to improve the transmission rate and bit error rate (BER) performance of multi-carrier differential chaos shift keying system (MC-DCSK). The additional bit information is mapped into phase and code index information based on MC-DCSK through carrier phase modulation and code index modulation techniques, significantly improving the information transmission rate and spectral efficiency. The signals are replicated P times at the transmitter and moving averaged at the receiver to reduce variance and achieve lower BER.
WIRELESS PERSONAL COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Tao Sui, Yongxin Feng, Bo Qian, Fang Liu, Qiang Jiang, Xiao Li
Summary: A new MC-ODBR-DCSK communication system is proposed in this paper, which improves transmission speed and energy efficiency by transmitting 2M bits of information data on M-channel subcarriers with two composite signals generated by an orthogonal chaotic signal generator as reference signals. The system does not require an RF delay circuit for demodulation, making it easier to implement. The paper analyzes the DBR of the system and compares the bit error rate performance with traditional DCSK systems in Rician fading and AWGN channels.
Article
Engineering, Electrical & Electronic
Georges Kaddoum, Ebrahim Soujeri
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2016)
Article
Engineering, Electrical & Electronic
Georges Kaddoum, Ebrahim Soujeri, Yogesh Nijsure
IEEE TRANSACTIONS ON COMMUNICATIONS
(2016)
Article
Computer Science, Information Systems
Ebrahim Soujeri, Georges Kaddoum, Minh Au, Marijan Herceg
Article
Engineering, Electrical & Electronic
E. Soujeri, G. Kaddoum, M. Herceg
ELECTRONICS LETTERS
(2018)
Article
Engineering, Electrical & Electronic
Marijan Herceg, Denis Vranjes, Georges Kaddoum, Ebrahim Soujeri
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2018)
Article
Engineering, Electrical & Electronic
Marijan Herceg, Denis Vranjes, Ratko Grbic, Josip Job
INTERNATIONAL JOURNAL OF ELECTRONICS
(2019)
Article
Computer Science, Information Systems
Marijan Herceg, Luka Filipovic, Tornislav Matic, Georges Kaddoum
IEEE WIRELESS COMMUNICATIONS LETTERS
(2019)
Article
Engineering, Biomedical
Tomislav Matic, Leon Sneler, Marijan Herceg
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2019)
Article
Engineering, Electrical & Electronic
Mohamed Dawa, Georges Kaddoum, Marijan Herceg
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2020)
Article
Engineering, Electrical & Electronic
Leon Sneler, Tomislav Matic, Marijan Herceg
Summary: The circuit is a tunable Impulse-Radio Ultra-Wideband pulse generator based on feedback oscillator switching, providing a wide range of pulse amplitude and width tuning while ensuring system robustness with respect to temperature variations.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Chemistry, Analytical
Majid Mobini, Georges Kaddoum, Marijan Herceg
Summary: This paper proposes a DL-based DLCSK demodulation scheme to enhance existing chaos-based wireless communication systems. By training an LSTM-based receiver offline for online signal classification, the proposed scheme can estimate channels implicitly and improve the bit error rate performance.
Article
Engineering, Electrical & Electronic
Luka Filipovic, Marijan Herceg, Jelena Vlaovic, Ertugrul Basar
Summary: A energy-efficient and low-complexity method for capacitive-coupled human body communication (CC-HBC) systems, named impedance shift keying CC-HBC, is proposed in this letter. Information is mapped by the change of impedance between the transmitter's signal and the ground electrode, allowing transmission and demodulation of information between the transmitter and the receiver. The performance of this method is compared with frequency shift keying and on-off keying modulations.
IEEE SENSORS LETTERS
(2021)
Article
Computer Science, Information Systems
Khaled Eshteiwi, Georges Kaddoum, Kais Ben Fredj, Ebrahim Soujeri, Francois Gagnon