Article
Chemistry, Multidisciplinary
Qiangguo Zhou, Qinxi Qiu, Tuntan Wu, Yongzhen Li, Zhiming Huang
Summary: This article proposes a novel ultrawideband terahertz linear polarization converter, which has the characteristics of high-purity output and near-zero copolarization transmission in the full band. The physical mechanism of polarization conversion is elucidated through the analysis of surface current and electric field distribution. In addition, the influence of geometric parameters on the device is discussed, providing theoretical support for the design of high-performance polarization converters.
Article
Environmental Sciences
Jiangang Ma, Yikang Yang, Lvyang Ye, Lingyu Deng, Hengnian Li
Summary: This paper proposes a new constant-envelope frequency-hopping binary offset carrier multiplexing modulation technique named ACE-FHBOC, which improves design flexibility and reduces interference problems. With lower ACF ambiguity and better anti-interference performance, ACE-FHBOC shows promise for the signal design of new generation global navigation satellite systems.
Article
Engineering, Electrical & Electronic
Erico S. P. Lopes, Lukas T. N. Landau
Summary: In this paper, we propose an optimal MMSE precoding technique using quantized signals with constant envelope. Our approach differs from existing techniques by employing uniform phase quantization and considering the most restrictive relaxation of the nonconvex problem for a suboptimal design. We also propose robust MMSE designs and three different soft detection methods, as well as an iterative detection and decoding scheme that allows the utilization of channel coding with low-resolution precoding.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Audiology & Speech-Language Pathology
Josef Schlittenlacher, Ji Xia Lim, Jemima Lawson, Brian C. J. Moore
Summary: An intense low-frequency tone can affect the perception of amplitude modulation applied to a high-frequency carrier. The presence of a 50-Hz pure tone increased the thresholds for detecting amplitude modulation, with higher thresholds observed at higher modulation frequencies. The presence of the 50-Hz tone did not show the expected maximum near 50 Hz, suggesting that modulation detection interference was not the cause. The phase relationship between the amplitude modulation and the 50-Hz tone influenced the thresholds, with the lowest thresholds observed when the modulation was ahead of the tone by 90 degrees.
Article
Materials Science, Multidisciplinary
Joyce Yew Pei Ling, Zaiton Abdul Mutalip, Afif Hakim Hasanudin, Faezah Jasman, Zeina Rihawi
Summary: In the field of visible light communication (VLC) systems, carrier-less amplitude and phase modulation, specifically the CAP-4 scheme, has been found to have better performance compared to basic On-Off Keying. This study analyzes the performance of CAP-2, CAP-4, and CAP-8 based on bit-error-rate, constellation diagram, and eye diagram. CAP-4 has the lowest EVM (-10.90 dB) and highest MER (11.30 dB), indicating superior performance.
OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Wei-Chiang Wu
Summary: In this paper, a novel multiuser detection scheme for uplink massive MIMO systems based on generalized spatial modulation (GSM) is proposed. The scheme utilizes the indices of active antennas to convey information, and consists of a two-stage detection structure. The proposed algorithm significantly increases the system capacity and reduces complexity compared to existing algorithms. Computer simulations demonstrate its near-far resistance and reliability for low-latency requirements.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Acoustics
Christopher Conroy, Andrew J. Byrne, Gerald Kidd
Summary: Recent research suggests the presence of specialized mechanisms in the auditory system for coding spectrotemporal modulations (STMs), tuned to different combinations of spectral modulation frequency, temporal modulation frequency, and STM sweep direction. This study used a psychophysical forward masking paradigm to investigate evidence of such mechanisms. The findings support the existence of an STM-specific coding mechanism with sweep-direction selectivity, as reflected in the detectability of the target.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Electrical & Electronic
Dongdong Zou, Fan Li, Wei Wang, Mingzhu Yin, Qi Sui, Zhaohui Li
Summary: In this paper, a modified GS algorithm is proposed and experimentally shown to be effective for compensating chromatic dispersion in an IM-DD communication system. By optimizing the amplitude information at the transmitter and the phase information before the receiver, the proposed scheme achieves good results and demonstrates potential as a solution for IM-DD-based optical communication links.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Kai Liu, Yongqing Huang, Xiaofeng Duan, Xiaomin Ren, Qi Wang, Shiwei Cai, Xiaowen Dong
Summary: Analyzed the impact of carrier transport on the high-speed modulation performance of the integrated optoelectronic transceiving chip, and found that the hole transporting time through the p-side cladding layer can affect the dynamic performance and modulation bandwidth for chips with different cavity lengths.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Zhaobang Zeng, Lemeng Leng, Peiyan Zhao, Chenbin Zhang, Ding Ding, Dun Mao, Tingyi Gu, Wei Jiang
Summary: In a parallel-coupled dual-racetrack modulator, interference between resonant light in two resonators is utilized to achieve high extinction ratios for high-speed modulation. The modulator also enables the generation of four-level pulse-amplitude modulation without an external DAC.
Article
Chemistry, Multidisciplinary
Masashi Unoki, Miho Kawamura, Maori Kobayashi, Shunsuke Kidani, Junfeng Li, Masato Akagi
Summary: In this study, we comprehensively investigated whether the temporal amplitude envelope (TAE) of speech contributes to urgency perception. Our findings revealed that the temporal modulation cues in the TAE of speech are a significant component in the perception of urgency.
APPLIED SCIENCES-BASEL
(2023)
Article
Neurosciences
Helene Serre, Marion Dohen, Susanne Fuchs, Silvain Gerber, Amelie Rochet-Capellan
Summary: Recent research suggests a biomechanical link between upper limb movements and speech acoustics. This study investigates whether the effect of physical impulse on speech acoustics can be extended to leg motion, and the results suggest that the lower limbs may also impact speech acoustics.
JOURNAL OF NEUROPHYSIOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Tonghui Ji, Chuanbowen Sun, Honglin Ji, Zhaopeng Xu, Yunfeng Peng, William Shieh
Summary: In this article, a new interleaved subcarrier loading scheme for double-sideband signals is proposed to achieve optical field recovery at low CSPRs in self-coherent detection systems. Theoretical and simulation results show that the proposed scheme can work under lower CSPRs than previous systems, with almost the same electrical spectral efficiency. Additionally, the process of parameter optimization for the interleaved CADD scheme is illustrated, leading to successful transmission of 100-Gbps 16-QAM OFDM signals over 160-km fiber at 3.5-dB CSPR.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Correction
Engineering, Electrical & Electronic
Luis Gonzalez-Guerrero, Muhsin Ali, Robinson Guzman, Horacio Lamela, Guillermo Carpintero
Summary: In this manuscript, we document four errors in [1] and provide their respective corrections. Two errors are notational typos without any implications, while the other two mistakes pertain to the simulations. Rectifying these two mistakes alters the technical analysis presented in [1] slightly, but it does not impact the main conclusions reported in the paper.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Gregory James Mazzaro
Summary: This study describes carrier modulation as a variant of intermodulation distortion and explores its application in the remote detection of RF electronic devices. Experimental results confirm that carrier modulation can be remotely stimulated from various RF electronics, and the spectrum of the distortion can be used to pinpoint the emitter's frequency-of-operation.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Weiping Li, Jianjun Yu, Junjie Ding, Yuxuan Tan, Yanyi Wang, Jiao Zhang, Chen Wang, Li Zhao, Kaihui Wang, Wen Zhou, Min Zhu, Jianguo Yu
Summary: This study demonstrates a long-distance, high-capacity wireless terahertz transmission system without THz amplifiers, utilizing photonics assistance. By employing dielectric lenses and advanced digital signal processing, signal transmission at rates of 124 Gbit/s over 54 meters and 44 Gbit/s over 104 meters have been achieved. This represents the longest wireless distance achievable using dielectric lenses without THz amplifiers.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Optics
Jiao Zhang, Qingyi Zhou, Min Zhu, Bingchang Hua, Mingzheng Lei, Yuancheng Cai, Liang Tian, Yucong Zou
Summary: This study demonstrates an experimental all-digital burst clock and data recovery technology for symmetrical single wavelength transmission in a 50 Gb/s four-level amplitude modulation passive optical network. By utilizing 10G-class optics and simple digital signal processing, accurate assessment of PON uplink transmission performance is achieved, showing significant link loss budget under specific conditions.
OPTICS COMMUNICATIONS
(2022)
Article
Optics
Junjie Ding, Mingxu Wang, Weiping Li, Bowen Zhu, Feng Wang, Chen Wang, Yanyi Wang, Wen Zhou, Jiao Zhang, Min Zhu, Jianjun Yu
Summary: A record-breaking 200-m terahertz (THz)-wave wireless delivery at 335 GHz is achieved using a photonics-aided scheme, with a net bit rate of 44 Gbit/s. This successful demonstration showcases the potential of high-speed THz-wave communication with advanced digital signal processing.
Article
Engineering, Electrical & Electronic
Junjie Ding, Weiping Li, Yanyi Wang, Jiao Zhang, Min Zhu, Wen Zhou, Jianjun Yu
Summary: In this study, we experimentally achieved wireless transmission of a 16-GBaud probabilistic shaped 256-ary quadrature amplitude modulation signal in a photonics-aided terahertz-wave communication system. By utilizing poly tetra fluoroethylene lenses and PS technique, we set a new record for single-carrier 256QAM THz-wave signal delivery, with a single line rate of 124.8 Gbit/s and net spectral efficiency of 6.2 bit/s/Hz.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Mingzheng Lei, Min Zhu, Bingchang Hua, Jiao Zhang, Yuancheng Cai, Yucong Zou, Xiang Liu, Jianjun Yu
Summary: This paper proposes and experimentally demonstrates a novel spectrum-efficient MMW-over-fiber architecture for joint sensing and communication in B5G optical-wireless converged networks. By interleaving polarization and using polarization-insensitive filtering, the architecture successfully generates and up-converts sensing and communication sidebands, reducing the need for higher bandwidth devices and spectral resources. Experimental results show high-precision single and dual-target detection accuracy, as well as high-speed error-free transmission rates.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Computer Science, Hardware & Architecture
Min Zhu, Jiahua Gu, Tianyu Shen, Jiao Zhang, Pingping Gu
Summary: Network function virtualization (NFV) is a promising network architecture paradigm that enables flexible deployment and management of service function chains (SFCs) by migrating network functions from dedicated hardware to software instances in a virtualized environment. This paper investigates the realization of delay-aware and resource-efficient SFC mapping in inter-datacenter elastic optical networks and proposes an optimization model and a mapping algorithm to achieve optimal virtual network function placement.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2022)
Article
Engineering, Electrical & Electronic
Jiao Zhang, Min Zhu, Bingchang Hua, Mingzheng Lei, Yuancheng Cai, Yucong Zou, Weidong Tong, Junjie Ding, Liang Tian, Like Ma, Jinbiao Xiao, Yongming Huang, Jianjun Yu, Xiaohu You
Summary: We propose and experimentally demonstrate a real-time fiber-THz-fiber 2 x 2 MIMO seamless integration system, achieving a record net rate of 103.125 Gb/s DP-QPSK signals over two spans of 20 km wireline single-mode fiber-link and 3 m wireless 2 x 2 MIMO link. Two THz-to-optical conversion schemes are compared based on an integrated DP-MZM and two discrete IMs. It is the first real-time demonstration of THz-wireless and 100 GbE fiber-optic networks seamless integration transmission, which is compatible with IEEE 802.3 and ITU-T G.798 specifications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Min Zhu, Jiao Zhang, Bingchang Hua, Mingzheng Lei, Yuancheng Cai, Liang Tian, Dongming Wang, Wei Xu, Chuan Zhang, Yongming Huang, Jianjun Yu, Xiaohu You
Summary: This study proposes a novel ultra-wideband fiber-THz-fiber seamlessly converged real-time architecture, which utilizes the commercially mature digital coherent optical module to realize ultrahigh-capacity THz real-time wireless communication. The architecture employs the dual-polarization photonic up-conversion technique for THz generation and hybrid optoelectronic down-conversion technique for THz reception to facilitate the seamless integration between optical fiber and THz communications. Multidimensional modulation techniques are adopted for UWB THz signals to improve spectral efficiency and transmission capacity.
SCIENCE CHINA-INFORMATION SCIENCES
(2023)
Proceedings Paper
Telecommunications
Guohao Ruan, Tian Pan, Chengcheng Lu, Zhengjie Luo, Houtian Wang, Jiao Zhang, Yushi Shen, Tao Huang, Yunjie Liu
Summary: With dynamic constellation topologies, low earth orbit (LEO) satellite systems require efficient routing protocols. This paper proposes a lightweight route flooding mechanism that reduces redundancy by generating a sparse flooding topology and designing an algorithm for optimal topology calculation.
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC 2022)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Feng Wang, Bowen Zhu, Cuiwei Liu, Kaihui Wang, Jiao Zhang, Junjie Ding, Junting Shi, Chen Wang, Li Zhao, Miao Kong, Yanyi Wang, Wen Zhou, Min Zhu, Jianguo Yu, Feng Zhao, Jianjun Yu
Summary: In this study, a digital chaos-based encryption scheme is implemented in a photonics-aided terahertz radio-over-fiber system. The encrypted PS-64QAM-OFDM signal is successfully transmitted over a 20 km SSMF and 54 m wireless link.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Yanyi Wang, Weiping Li, Junjie Ding, Jiao Zhang, Feng Wang, Chen Wang, Li Zhao, Cuiwei Liu, Wen Zhou, Jianguo Yu, Mingzheng Lei, Min Zhu, Feng Zhao, Jianjun Yu
Summary: In this study, a novel integrated architecture for high-resolution THz band radar sensing and long-distance communication system, based on photonics, was proposed and experimentally demonstrated. The research achieved the first successful transmission of 60 Gbit/s THz signals at 340 GHz band over a wireless distance of 50 m, using an integrated radar with a resolution of 1.58 cm.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Jiao Zhang, Min Zhu, Mingzheng Lei, Bingchang Hua, Yuancheng Cai, Yucong Zou, Liang Tian, Aijie Li, Yongming Huang, Jianjun Yu, Xiaohu You
Summary: This study demonstrates the first real-time transparent fiber-THz-fiber 2 x 2 MIMO transmission system, based on photonic down-conversion, achieving a record line rate of 125.516 Gbit/s and a net data rate of 103.125 Gbit/s at a frequency range of 360 GHz-430 GHz.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Jiao Zhang, Min Zhu, Bingchang Hua, Mingzheng Lei, Yuancheng Cai, Yucong Zou, Liang Tian, Aijie Li, Yongming Huang, Jianjun Yu, Xiaohu You
Summary: This paper demonstrates the applications of 6G-oriented 100 GbE real-time streaming service in fiber-THz-fiber seamless transmission. With the utilization of photonic up-/down-conversion and digital coherent modules, a record net data rate of 103.125 Gbps at 370 GHz has been achieved.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Junjie Ding, Weiping Li, Yanyi Wang, Jiao Zhang, Feng Wang, Chen Wang, Jiaxuan Liu, Kaihui Wang, Li Zhao, Cuiwei Liu, Miao Kong, Wen Zhou, Min Zhu, Jianguo Yu, Feng Zhao, Jianjun Yu
Summary: Researchers successfully demonstrated the transmission of a 16-GBaud PS-256QAM signal in a photonics-aided THz-wave communication system, achieving a remarkable single line rate and net spectral efficiency.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Yuancheng Cai, Min Zhu, Sheng Liang, Jiao Zhang, Mingzheng Lei, Bingchang Hua, Pengyuan Wang, Liang Tian, Yucong Zou, Aijie Li, Yongming Huang, Jianjun Yu, Xiaohu You
Summary: In this study, we demonstrate real-time bi-directional 1.5Gbps uncompressed high-definition video transmissions using a 256-element phased-array antenna and photonics-assisted mm-Wave communication. The FPGA-based self-steering beamforming is implemented with the proposed automatic beam tracking technique.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
