Article
Computer Science, Information Systems
Bai Shi, Huaizong Shao, Jingran Lin, Wei Zhang
Summary: Unmanned aerial vehicles and Internet-of-Things devices have brought convenience to daily life, but malicious use can pose serious threats to public security. Transmitting interference signals to disrupt wireless communication links is an effective way to counteract these threats. However, complex jamming waveforms are difficult to realize and the efficiency of jamming power is critical. Constant-envelope jamming waveforms appear to be a promising solution to these problems.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Jing He, Lin Xu, Yaoqiang Xiao
Summary: This paper proposes and experimentally demonstrates different rotated QAM-based DMT schemes. To overcome high-frequency fading in the underwater optical wireless communication (UOWC) channel, a deviation correction-based maximum likelihood detection (DC-MLD) is introduced. Other rotated-QAM schemes using machine learning, such as k-means clustering, support vector machine (SVM), and logistic regression (LR), are investigated. The experimental results show that the rotated-QAM schemes outperform the traditional 16QAM DMT in terms of received optical power (ROP) sensitivity and bit error rate (BER).
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yeonsoo Jang, Taewoo Lee, Dongweon Yoon
Summary: In this paper, a new decision method based on a support vector machine is proposed to improve the bit error rate performance of quadrature amplitude modulation (QAM) for arbitrary complex impairments. The algorithm assigns bit decision boundaries for M-ary QAM, considering the asymmetry caused by impairments. The optimal decision boundaries are determined by learning a linear classification model from received QAM signals, and the decision rules are presented for each bit based on the obtained optimal decision boundaries.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Shun Ishihara, Kenta Umebayashi, Janne J. Lehtomaki
Summary: This paper focuses on the energy detection of M-ary QAM signals and proposes three statistical distribution models to avoid the computational cost of brute-force search.
Article
Engineering, Electrical & Electronic
Wenjuan Yu, Haowei Jia, Leila Musavian
Summary: In this paper, joint adaptive M-QAM modulation and power adaptation for a downlink two-user non-orthogonal multiple access (NOMA) network are studied. Different power allocation strategies are proposed and the performance of joint adaptive transmission is analyzed. A dynamic rate and power adaptation (DRPA) algorithm is also proposed to further increase the total transmission rate.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Vishaka Basnayake, Dushantha Nalin K. Jayakody, Hakim Mabed, Ambrish Kumar, Tharindu D. Ponnimbaduge D. Perera
Summary: This paper proposes an asynchronous non-orthogonal multiple access-based cyclic triangular successive interference cancellation scheme for device-to-device networks. The scheme reduces decoding complexity, energy consumption, and bit error rate. It follows three stages: optimization, decoding, and retransmission.
Article
Computer Science, Information Systems
Zhuwen Yang, Guofa Cai
Summary: This paper proposes a new non-coherent cross-quadrature amplitude modulation (XQAM)-based M-ary differential chaos shift keying (XQAM-MDCSK) system, where an autocorrelator is used at the receiver to obtain the channel compensation value. Results show that the proposed system achieves better bit error rate (BER) performance and a lower peak-to-average power ratio (PAPR) compared to the star QAM-MDCSK system.
Article
Optics
Jiaxuan Liu, Jianjun Yu, Tangyao Xie, Xiongwei Yang, Long Zhang, Yi Wei, Tianqi Zheng, Jiao Zhang, Wen Zhou, Min Zhu, Jianguo Yu, Feng Zhao
Summary: This study proposes and experimentally verifies a photonics-aided W-band millimeter wave radio-over-fiber polarization-multiplexed envelope detection system for high-order quadrature amplitude modulation signals. To address the issues of low spectral efficiency and distortion in envelope detection of high-order QAM, the system introduces quantization noise suppressed delta-sigma modulation. The experimental results demonstrate that the system can transmit 131072 QAM signals meeting the error vector magnitude requirements of 5G new radio, and transmit 1048576 QAM signals meeting the soft decision threshold at 20%.
Article
Physics, Multidisciplinary
Zhi Quan, Jiyu Luo, Hailong Zhang, Li Jiang
Summary: Massive multiple-input multiple-output (MIMO) systems outperform small-scale MIMO systems in terms of data rate, making them crucial for next-generation wireless systems. However, the increased number of antennas poses computational challenges for data detection, thus requiring more efficient techniques. This paper introduces a detector based on joint deregularized and box-constrained dichotomous coordinate descent (BOXDCD) with iterations for rectangular m-ary quadrature amplitude modulation (M-QAM) symbols. The proposed detector achieves significant performance improvement compared to existing algorithms, with the advantage increasing with system size and signal-to-noise ratio.
Article
Engineering, Electrical & Electronic
Soumya P. Dash, Ranjan K. Mallik, Badri Ramanjaneya Reddy
Summary: This study examines a receive diversity power line communication system affected by correlated multipath channel fading and additive Nakagami-m background noise. It introduces an optimal receiver utilizing 4-ary imbalanced-phase-amplitude modulation for data transmission, as well as numerically computes the optimal constellation and investigates its optimality in relation to noise parameters and multipath channel gains.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Telecommunications
Veenu Kansal, Simranjit Singh
Summary: In this paper, a framework for deriving the closed-form expression for the average symbol error probability (ASEP) of generalized M-QAM over the Beaulieu-Xie fading channel is proposed. The derivation is presented using the Gauss hypergeometric function. Numerical results show that 64-QAM requires more average SNR compared to 16-QAM to achieve the desired ASEP.
TELECOMMUNICATION SYSTEMS
(2021)
Article
Telecommunications
Shuang Wei, Yajie Li, Kongni Zhu, Chao Lei, Yuang Li, Mengwen Pan, Wei Wang, Yongli Zhao, Jie Zhang
Summary: In the quantum noise stream cipher system, we propose an artificial amplitude noise-based secure key distribution scheme to generate secret keys for legal parties. The scheme can be implemented in high-speed optical communication systems and has the advantages of lower cost, better compatibility, and a higher key generation rate.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Computer Science, Information Systems
Dongxu Lu, Xian Zhou, Yuqiang Yang, Jiahao Huo, Jinhui Yuan, Keping Long, Changyuan Yu, Alan Pak Tao Lau, Chao Lu
Summary: This paper studies and compares the theoretical bit error rate (BER) of N-level PAM and M-QAM under different scenarios. Mathematical BER equations, including OSNR and CSPR, are provided for PAM signals. Simulation results show that the BER evaluation methods can serve as a theoretical guidance and system assessment criteria for SSB scenarios.
SCIENCE CHINA-INFORMATION SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Apurve K. Pandey, Kallapu Reeshitha, Soumya P. Dash
Summary: A non-multipath and receive diversity power line communication system subject to Rayleigh fading is analyzed in this paper. The optimal receiver structures for non-multipath and multipath PLC systems are proposed, and closed-form expressions for symbol error probability are derived. The optimal symbol correlation matrix for MFSK modulation is obtained using a search-based algorithm to achieve minimal SEP values.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Akintunde O. Iyiola, Ayokunle D. Familua, Theo G. Swart, Thokozani Shongwe
Summary: In this study, a three-state Fritchman-Markov chain-based error model for power line communication (PLC) is proposed, and a software-defined PLC system is developed. By analyzing error patterns, it can enhance data transmission efficiency and optimize PLC systems. The error model accurately represents the error characteristics of the developed M-QAM SD-PLC system.
