Results 11 to 20 of about 176,830 (290)

Free-space scattering characterization of ultrathin reflective metasurfaces and high-Q-factor sensing methods for conductor-backed materials

Results in Physics, 2022
Metal-backed materials establish the bridge linking traveling and surface waves for beam manipulation. Based on S-parameters, extracting the constitutive effective parameters (CEPs) is significant for characterizing their electromagnetic (EM) properties.
Feng-Yuan Han, Jin Zhao, Zi-Wen Zhang, Ming-Zhe Chong, Li-Zheng Yin, Tie-Jun Huang, Di Wang, Yun-Hua Tan, Pu-Kun Liu   +8 more
doaj   +1 more source

MDM-TDM PON Utilizing Self-Coherent Detection-Based OLT and RSOA-Based ONU for High Power Budget

IEEE Photonics Journal, 2016
A cost-effective mode-division-multiplexing and time-division-multiplexing passive optical network (MDM-TDM PON) utilizing a self-coherent detection for upstream signal at optical line terminal (OLT) and a high-gain reflective semiconductor optical ...
Yuanxiang Chen, Juhao Li, Peng Zhou, Paikun Zhu, Yu Tian, Zhongying Wu, Jinglong Zhu, Ke Liu, Dawei Ge, Jingbiao Chen, Yongqi He, Zhangyuan Chen   +11 more
doaj   +1 more source

Frequency Stabilization of a Cesium Faraday Laser With a Double-Layer Vapor Cell as Frequency Reference

IEEE Photonics Journal, 2022
We implement a compact optical frequency standard at the wavelength of 852 nm by the modulation transfer spectroscopy (MTS) technique, using a Faraday laser as the local oscillator and a double-layer cesium vapor cell to provide frequency reference.
Hangbo Shi, Pengyuan Chang, Zhiyang Wang, Zijie Liu, Tiantian Shi, Jingbiao Chen   +5 more
doaj   +1 more source

Weighted Inter-frame Averaging-Based Channel Estimation for CO-OFDM System

IEEE Photonics Journal, 2013
We propose an efficient channel estimation method for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) based on weighted inter-frame averaging (WIFA), in which the channel estimation results of the adjacent frames are averaged to ...
Hui Zhao, Juhao Li, Paikun Zhu, Cheng Zhang, Yue Liu, Yuping Zhao, Yongqi He, Zhangyuan Chen   +7 more
doaj   +1 more source

Broadband Photonic Down-Conversion Preprocessor for ADC With Arcsine Equalization

IEEE Photonics Journal, 2020
It is a challenge to convert broadband millimeter-wave signals directly with electronic analog-to-digital converters (ADCs). The photonic down-conversion preprocessor is a promising solution.
Rui Guo, Yankun Li, Chenbo Zhang, Peng Lei, Qing Yin, Xiaopeng Xie, Zhangyuan Chen   +6 more
doaj   +1 more source

Bidirectional wavelength-division multiplexing transmission over installed fibre using a simplified optical coherent access transceiver

Nature Communications, 2017
The signalling scheme used in access networks require electrical bandwidths many times greater than subscribers can utilise. Here, the authors describe a promising approach to achieve bidirectional transmission with bandwidth-efficient yet low-complexity
M. S. Erkılınç, D. Lavery, K. Shi, B. C. Thomsen, R. I. Killey, S. J. Savory, P. Bayvel   +6 more
doaj   +1 more source

Neural Successive Cancellation Polar Decoder With Tanh-Based Modified LLR Over FSO Turbulence Channel

IEEE Photonics Journal, 2020
The neural successive cancellation (NSC) decoder with tanh-based modified log-likelihood ratio (LLR) is proposed for reducing the decoding latency of polar codes over free space optical (FSO) turbulence channel.
Jiafei Fang, Meihua Bi, Shilin Xiao, Hang Yang, Zhiyu Chen, Zhiyang Liu, Weisheng Hu   +6 more
doaj   +1 more source

2-D DOA tracking using variational sparse Bayesian learning embedded with Kalman filter

EURASIP Journal on Advances in Signal Processing, 2018
In this paper, we consider the 2-D direction-of-arrival (DOA) tracking problem. The signals are captured by a uniform spherical array and therefore can be analyzed in the spherical harmonics domain.
Qinghua Huang, Jingbiao Huang, Kai Liu, Yong Fang   +3 more
doaj   +1 more source

Fair Resource Allocation Based on User Satisfaction in Multi-OLT Virtual Passive Optical Network

IEEE Access, 2020
In this paper, a fair resource allocation mechanism based on user satisfaction in multiple optical line terminal (multi-OLT) virtual passive optical network (VPON) is proposed.
Nianfei Zhan, Chaoqin Gan, Jianqiang Hui, Yaqin Guo   +3 more
doaj   +1 more source

Experimental Demonstration of 1.2-Tb/s Optical PDM SCFDM Superchannel Multicasting by HNLF

IEEE Photonics Journal, 2013
Threefold 1.2-Tb/s optical polarization-division-multiplexing (PDM) single-carrier frequency-division-multiplexing (SCFDM) and orthogonal-frequency-division-multiplexing (OFDM) superchannel multicasting, utilizing multiple-pump four-wave mixing (FWM) by ...
Yuanxiang Chen, Juhao Li, Paikun Zhu, Yingying Xu, Yongqi He, Zhangyuan Chen   +5 more
doaj   +1 more source