Results 41 to 50 of about 4,646,007 (214)

Experimental Study on Shortwave Communication and OTHR Integrated System Based on OFDM Waveform

Leida xuebao, 2012
Based on the recently developed active-passive multifunctional all-digital HF surface wave radar hardware platform of Wuhan University, an experiment study of integrated technology for shortwave communication and Over-The-Horizon Radar (OTHR) application
Shao Qi-hong, Wan Xian-rong, Zhang De-lei, Zhao Zhi-xin, Ke Heng-yu   +4 more
doaj   +1 more source

Digital Domain Power Division Multiplexing Optical OFDM for Free Space Optical Communication (FSOC) Using 10-GHz Bandwidth Optical Components

IEEE Photonics Journal, 2022
We put forward and provide the first illustration of a high capacity and high spectral efficient free space optical communication (FSOC) system using digital domain power division multiplexing orthogonal-frequency-division-multiplexed (DDPD-O-OFDM ...
Wahyu Hendra Gunawan, Chi-Wai Chow, Yang Liu, Yun-Han Chang, Yin-He Jian, Ching-Wei Peng, Chien-Hung Yeh   +6 more
doaj   +1 more source

Unified Downlink‐Uplink Waveform Optimization For MIMO‐OFDM Integrated Sensing and Communication

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper presents a unified waveform allocation framework for downlink and uplink MIMO‐OFDM integrated sensing and communication (ISAC) systems in 6G networks. We develop five optimization schemes, including optimal‐for‐communication, optimal‐for‐sensing, and MMSE‐based joint allocation, with closed‐form expressions for spectral efficiency, sensing ...
Gujjula Ramya, Puli Kishore Kumar, Santhosh Kumar Dhatrika   +2 more
wiley   +1 more source

OFDM SIGNAL ENERGY CHARACTERISTICS RESEARCH IN CHANNEL WITH PERMANENT PARAMETERS

Information and Telecommunication Sciences, 2013
The simulation model for OFDM (Orthogonal Frequency Division Multiplexing) signal energy characteristics research is developed. The OFDM signal vector-phase states are examined. The momentary amplitudes distribution function is obtained.
Leonid Uryvskyi, Serhii Osypchuk
doaj   +1 more source

Orthogonal frequency division multiplexing (OFDM) in photonic communications [PDF]

, 2010
OFDM has emerged as a promising modulation technique in long-haul and access optical networks because of a number of advantages: Scalable spectrum partitioning, good spectral efficiency, dispersion tolerance, and a natural suitability for software-defined transmission.
Freude, W., Hillerkuss, D., Schellinger, T., Schmogrow, R., Winter, M., Vallaitis, T., Bonk, R., Marculescu, A., Li, J., Dreschmann, M., Meyer, J., Ben Ezra, S., Narkiss, N., Nebendahl, B., Parmigiani, F., Petropoulos, P., Resan, B., Weingarten, K., Ellermeyer, T., Lutz, J., Möller, M.   +20 more
openaire  

Secret Key Extraction Using Stable Channel Impulse Response in OFDM Wireless Networks

IET Communications, Volume 20, Issue 1, January/December 2026.
The process of converting a complex impulse response (CIR) highest peak into a binary sequence is called ‘quantisation’. By quantising the CIR highest peaks, Alice and Bob will generate the secret key bit sequences KA and KB, respectively. The number of CIR highest peaks is infinite, and these highest peaks can be easily selected from the set of CIRs ...
Dinh Van Linh, Vu Van Yem, Hoang Thi Phuong Thao   +2 more
wiley   +1 more source

MMSE Channel Prediction for Symbol-by-Symbol Adaptive OFDM Systems

, 2000
Subband Adaptive Orthogonal Frequency Division Multiplexing (OFDM) constitutes an effective method of compensating for the frequency selective fading incurred by mobile receivers.
Münster, M., Hanzo, L.
core   +1 more source

Clock Asynchronism Calibration in Bistatic Sensing Systems via Expert‐Guided Cross‐Attention Mechanism

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper addresses the issue of sampling point offset and ranging bias caused by frequency discrepancies between the crystal oscillators of transceivers in bistatic sensing systems, proposing an expert‐guided cross‐attention network. ABSTRACT With the rapid evolution of wireless communication networks, it has become increasingly desirable for base ...
Haitao Zhao, Zhennan Qin, Wenchao Xia, Chun Zhu, Yadong Wang   +4 more
wiley   +1 more source

Non-Orthogonal Multicarrier Waveform for Radar With Communications Systems: 24 GHz GFDM RadCom

IEEE Access, 2019
In this paper, we propose the usage of Generalized Frequency Division Multiplexing (GFDM), a non-orthogonal multicarrier waveform for radar. We presented a novel method that cancels the effect of interference caused by the non-orthogonality of GFDM ...
Jessica B. Sanson, Daniel Castanheira, Atilio Gameiro, Paulo P. Monteiro   +3 more
doaj   +1 more source

Deep Reinforcement Learning‐Enabled QoS‐Aware Adaptive Modulation for Visible Light‐Infrared Communication Systems

IET Communications, Volume 20, Issue 1, January/December 2026.
To address the challenges of channel sensitivity and reliability in aircraft cabin environments, this paper proposes a reinforcement learning‐assisted bidirectional communication system utilizing visible light for the downlink and infrared for the uplink. By combining an improved, resource‐efficient LMMSE algorithm for channel estimation with RL‐driven
Lei Xiao, Quanyi Cheng, Baolin Lai, Xiaodong Liu, BuGao Liu, Junyi Du   +5 more
wiley   +1 more source