Results 31 to 40 of about 35,081 (210)
Principles，technologies and challenges of OQAM-OFDM for 5G applications
Dianxin kexue, 2016 5G will need to be able to support much larger connections of communication devices and meet the requirements of diverse scenarios.However，this requirement cannot be met by OFDM（orthogonal frequency division multiplexing）due to its own drawbacks.As an ...
Jun LI +4 more
doaj +2 more sources
OFDM transmission scheme with subcarrier supply index modulation
Tongxin xuebao, 2023 To address the drawback that subcarrier activation pattern (SAP) of the orthogonal frequency division multiplexing with index modulation (OFDM-IM) cannot match the binary numbers which affects the system performance, the orthogonal frequency division ...
Yi GUO +3 more
doaj +2 more sources
Robust time synchronization for NC-OFDM cognitive radio systems
Journal of King Saud University: Computer and Information Sciences, 2022 In this paper, we propose a time-synchronization method for non-contiguous orthogonal frequency division multiplexing (NC-OFDM) systems. NC-OFDM is a modulation and multiplexing technique that is often used for cognitive radio (CR) systems. In OFDM-based
Suyoto Suyoto +3 more
doaj +1 more source
, 2007 In this contribution, a nonlinear hybrid detection scheme based on a novel soft-information assisted Genetic Algorithm (GA) is proposed for a Turbo Convolutional (TC) coded Space Division Multiplexing (SDM) aided Orthogonal Frequency Division ...
Akhtman, Jos, Hanzo, Lajos, Jiang, Ming
core +1 more source
Orthogonal frequency-division multiplexing in wireless communication systems with multimode fiber feeds [PDF]
, 2001 The feasibility of using multimode fiber as an inexpensive cell feed in broad-band indoor picocellular systems is investigated in this paper. The performance of coded orthogonal frequency-division multiplexing (OFDM) for a variety of multimode fiber ...
Dixon, B.J., Iezekiel, S., Pollard, R.D.
core +1 more source
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 +6 more
wiley +1 more source
Parallel-Interference-Cancellation-Assisted Decision-Directed Channel Estimation for OFDM Systems using Multiple Transmit Antennas [PDF]
, 2005 The number of transmit antennas that can be employed in the context of least-squares (LS) channel estimation contrived for orthogonal frequency division multiplexing (OFDM) systems employing multiple transmit antennas is limited by the ratio of the ...
Hanzo, L., Munster, M.
core +1 more source
A Supervised Learning Method for High‐Performance Channel State Information Estimation
IET Communications, Volume 20, Issue 1, January/December 2026.This paper proposes a deep neural network (DNN)‐based method for channel state information (CSI) estimation, incorporating a Discrete Fourier Transform (DFT) step to reduce noise impact and improve learning accuracy. Simulation results demonstrate that the proposed method achieves superior channel estimation performance, particularly in noisy wireless ...
Tianle Han, Yongwei Zhang, Murat Temiz
wiley +1 more source
IEEE Access, 2020 The future mobile networks will face challenges in support of heterogeneous services over a unified physical layer, calling for a waveform with good frequency localization. Filtered orthogonal frequency division multiplexing (f-OFDM), as a representative
Juquan Mao +3 more
doaj +1 more source
Acceleration‐Aware Estimation and Compensation of Doppler Scale for Mobile UWA OFDM Systems
IET Communications, Volume 20, Issue 1, January/December 2026.We propose a novel method to estimate and compensate for the Doppler scale caused by acceleration in orthogonal frequency division multiplexing (OFDM)‐based underwater acoustic (UWA) systems. Simulation results under additive white Gaussian noise (AWGN), synthetic multipath and realistic waymark channel conditions demonstrate that the proposed approach
Yong‐Ho Cho, Seung‐Geun Kim
wiley +1 more source