Peak to average power ratio reduction in NC–OFDM systems [PDF]
, 2015 Non contiguous orthogonal frequency division multiplexing (NC-OFDM) is an efficient and adaptable multicarrier modulation scheme to be used in cognitive radio communications.
Ghafoor, Abdul +2 more
core +1 more source
An Effective Technique for Increasing Capacity and Improving Bandwidth in 5G NB-IoT [PDF]
arXiv, 2022 With hundreds of billions of the IoT connected devices, it is important for researchers to create effective resource management approach to satisfy the quality of service (QoS) requirements of 5th generation (5G) and beyond. Furthermore, wireless spectrum is increasingly scarce as demand for wireless services develops, demanding imaginative approaches ...
arxiv
A novel BCS code in F-OFDM system: a promising candidate for 5G wireless communication systems [PDF]
, 2021 Due to the rapid growth in wireless communication systems, Long Term Evolution (LTE), mainly based on Orthogonal Frequency Division Multiplexing (OFDM), no longer meets wireless communication systems request and higher data rate requirements. Thus,
Hussain, Ghasan Ali
core
Power spectrum characterization of systematic coded UW-OFDM systems [PDF]
, 2013 Unique word (UW)-OFDM is a newly proposed multicarrier technique that has shown to outperform cyclic prefix (CP)-OFDM in fading channels. Until now, the spectrum of UW-OFDM is not thoroughly investigated. In this paper, we derive an analytical expression
Khoshbin, Hossein +2 more
core +2 more sources
Preamble-Based Channel Estimation for CP-OFDM and OFDM/OQAM Systems: A Comparative Study [PDF]
, 2009 In this paper, preamble-based least squares (LS) channel estimation in OFDM systems of the QAM and offset QAM (OQAM) types is considered, in both the frequency and the time domains.
Katselis, Dimitris +3 more
core +1 more source
Enhanced asymmetrically-clipped optical OFDM [PDF]
Opt. Express 24, 3950-3966 (2016), 2015 Asymmetrically clipped optical orthogonal frequency-division multiplexing (ACO-OFDM) is a technique that sacrifices spectral efficiency in order to transmit an orthogonally frequency-division multiplexed signal over a unipolar channel, such as a directly modulated direct-detection fiber or free-space channel.
arxiv +1 more source
Dual‐Band Metasurface‐Based Structured Light Generations for Futuristic Communication Applications
Small Science, EarlyView.This study introduces a single‐cell‐driven dual‐band metasurface platform generating nondiffracting perfect vortex beams for Ultraviolet–Visible wavelengths. The metasurfaces, composed of silicon nitride nanoantennas, maintain high transmission efficiency across dual spectrums.
Muhammad Danial Shafqat +11 more
wiley +1 more source
Maximal Spectral Efficiency of OFDM with Index Modulation under Polynomial Space Complexity [PDF]
IEEE Wireless Communications Letters, 2020, 2019 In this letter, we demonstrate a mapper that enables all waveforms of OFDM with Index Modulation (OFDM-IM) while preserving polynomial time and space computational complexities. Enabling all OFDM-IM waveforms maximizes the spectral efficiency (SE) gain over the classic OFDM but, as far as we know, the computational overhead of the resulting mapper ...
arxiv +1 more source
PAR-Aware Large-Scale Multi-User MIMO-OFDM Downlink [PDF]
, 2012 We investigate an orthogonal frequency-division multiplexing (OFDM)-based downlink transmission scheme for large-scale multi-user (MU) multiple-input multiple-output (MIMO) wireless systems.
Larsson, Erik G., Studer, Christoph
core +1 more source
On the Inclusion and Utilization of Pilot Tones in Unique Word OFDM [PDF]
, 2020 Unique word-orthogonal frequency division multiplexing (UW-OFDM) is known to provide various performance benefits over conventional OFDM using cyclic prefixes (CP). Most important, UW-OFDM features excellent spectral sidelobe suppression properties and an outstanding bit error ratio performance.
arxiv +1 more source