Results 51 to 60 of about 2,608 (229)

A Power-Domain MST Scheme With BPPM in NLOS Ultraviolet Communications

IEEE Photonics Journal, 2023
Due to the high path loss of non-line-of-sight (NLOS) ultraviolet communications (UVC) channel, pulse modulation schemes, such as on-off keying (OOK) and M-ary pulse-position modulation (PPM), and photon-counting receivers are commonly adopted.
Tian Cao, Tianfeng Wu, Changyong Pan, Jian Song   +3 more
doaj   +1 more source

Resonant Tunneling Diode‐Integrated Terahertz Transceiver Module for Wireless Communications

Advanced Photonics Research, Volume 7, Issue 4, April 2026.
Resonant tunneling diode‐enabled terahertz transceiver module. Terahertz bands are essential for next‐generation wireless communications, offering ultrabroad bandwidth and unprecedented data throughput. However, realizing compact, low‐cost, broadband, and efficient terahertz transceiver modules remains challenging.
Weijie Gao, Nguyen H. Ngo, Daiki Ichikawa, Mingxiang Li, Yuta Inose, Yuki Morita, Hidemasa Yamane, Yoshiharu Yamada, Shuichi Murakami, Yosuke Nishida, Tadao Nagatsuma, Withawat Withayachumnankul, Masayuki Fujita   +12 more
wiley   +1 more source

Bit error performance of diffuse indoor optical wireless channel pulse position modulation system employing artificial neural networks for channel equalisation

, 2009
The bit-error rate (BER) performance of a pulse position modulation (PPM) scheme for non-line-of-sight indoor optical links employing channel equalisation based on the artificial neural network (ANN) is reported.
Ghassemlooy, Zabih, Angelova, Maia, Rajbhandari, Sujan   +2 more
core   +1 more source

32-Gb/s OOK and 64-Gb/s PAM-4 Modulation Using a Single-Drive Silicon Mach–Zehnder Modulator with 2 V Drive Voltage

IEEE Photonics Journal, 2019
We demonstrate a high-efficiency silicon Mach-Zehnder modulator with U-shaped PN junctions. The depletion region of the U-shaped PN junction has a large overlap with the waveguide optical mode, leading to a low drive voltage.
Gangqiang Zhou, Linjie Zhou, Yuyao Guo, Shuhuang Chen, Liangjun Lu, Lei Liu, Jianping Chen   +6 more
doaj   +1 more source

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, Volume 36, Issue 25, 26 March 2026.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

Investigation of Characteristics of Ultraviolet Light Pulse Weak Signal Communication System Based on Fourth-Order Frequency-Shift Keying Modulation

Photonics
In ultraviolet (UV) communication, On–Off Keying (OOK) is the primary modulation technique. Compared to OOK, frequency modulation offers stronger resistance to path attenuation.
Yingkai Zhao, Axin Du, Yu Jiao, Li Kuang, Jiawen Chen, Ning Sun, Jianguo Liu   +6 more
doaj   +1 more source

Performance Analysis of CA‐Polar Code for 5G‐IoT Low Power Wide Area Networks

Internet Technology Letters, Volume 9, Issue 2, March/April 2026.
ABSTRACT CRC‐Aided Polar (CA‐Polar) codes are the standardized channel coding scheme for control channels of 5G eMBB service class due to their capacity achieving performance. This work aims to assess the compatibility and scalability of CA‐Polar codes toward low power IoT applications coming under the domain of LPWAN.
Abhilasha Gautam, Prabhat Thakur, Ghanshyam Singh   +2 more
wiley   +1 more source

Aphid parasitism alters induced plant responses allowing a hyperparasitoid to locate its hidden parasitoid host

New Phytologist, Volume 249, Issue 4, Page 2055-2070, February 2026.
Summary Plants typically host insect communities composed of multiple trophic levels that are intricately linked through interactions mediated by the shared food plant. Hyperparasitoids are top‐level carnivores in such systems, preying on parasitoid larvae developing inside herbivores. These hyperparasitoids can dramatically reduce the effectiveness of
Mitchel E. Bourne, Alessia Vitiello, Gabriel A. Charvalakis, Leandra Meerkerk, Berhane T. Weldegergis, Karen J. Kloth, Erik H. Poelman   +6 more
wiley   +1 more source

Comparison of DPSK and OOK modulation format in 160 Gbit/s transmission system

, 2022
S.1458-1459Single-polarisation 160 Gbit/s OTDM transmission over 3x80 km dispersion-managed SLA fibre using DPSK and OOK modulation is reported. The influence of the fibre input power is experimentally and theoretically investigated.
Boerner, C., Ludwig, R., Berger, J., Unterbörsch, G., Weber, H.G., Ferber, S., Schmauss, B., Wietfeld, A., Schubert, C.   +8 more
core   +1 more source

Demonstration of 3D‐Printed Optical Antennas for High‐Speed Optical Wireless Communication Using Market‐Ready Materials

Advanced Materials Technologies, Volume 11, Issue 1, 8 January 2026.
The feasibility of 3D‐printed optical antennas using commercial, non‐optical materials for Optical Wireless Communications (OWC) is demonstrated. This study combines spectral analysis, anisotropy effects, and telecom‐relevant optical measurements, revealing promising performance and novel insights for low‐cost, customizable photonic components in ...
Mauro Aresti, Marco Meucci, Paolo Foggi, Caterina Credi, Satoshi Iketani, Cristiana Lofrumento, Jacopo Catani   +6 more
wiley   +1 more source