Flexible and fast multi‐level modulation format identification using optical orthogonal frequency division multiplexing redundancy subcarriers
Sign Up to like & getrecommendations! Published in 2021 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.32906
Abstract: Compared with the orthogonal frequency division multiplexing (OFDM) communication system, the subcarrier‐index modulation OFDM communication system can alleviate the problem of peak‐to‐average power ratio and the frequency offset sensitivity. Therefore, the problem of inter carrier… read more here.
Keywords: modulation format; frequency division; modulation; frequency ... See more keywords
Design and analysis of 5G network architecture with orthogonal frequency division multiple access based passive optical network
Sign Up to like & getrecommendations! Published in 2021 at "Optical Fiber Technology"
DOI: 10.1016/j.yofte.2021.102678
Abstract: Abstract The demand for high-speed internet with a high-capacity network is increasing at an exponential rate. It is quite challenging to accommodate a large number of users with multiple communication devices without degrading the quality… read more here.
Keywords: network; analysis; orthogonal frequency; network architecture ... See more keywords
Superposition Coded-Orthogonal Frequency Division Multiplexing
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Access"
DOI: 10.1109/access.2018.2814050
Abstract: Orthogonal frequency division multiplexing (OFDM) technique is the most used approach in various wireless communication technologies due to its implementation advantages. However, OFDM has also some significant drawbacks, such as the sensitivity against real-time impairments… read more here.
Keywords: division multiplexing; real time; time; frequency division ... See more keywords
Faster-Than-Nyquist Non-Orthogonal Frequency-Division Multiplexing for Visible Light Communications
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Access"
DOI: 10.1109/access.2018.2820100
Abstract: In this paper, we propose a faster-than-Nyquist non-orthogonal frequency-division multiplexing (NOFDM) scheme for visible light communications (VLCs) where the multiplexing/demultiplexing employs the inverse fractional cosine transform (IFrCT)/FrCT. Different to the common fractional Fourier transform-based NOFDM… read more here.
Keywords: faster nyquist; frequency; nyquist non; non orthogonal ... See more keywords
SVD-Based Design for Non-Orthogonal Frequency Division Multiplexing
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Communications Letters"
DOI: 10.1109/lcomm.2020.3045719
Abstract: Conventional non-orthogonal frequency division multiplexing (NFDM) suffers from inter-channel interference (ICI) due to the loss of orthogonality among subcarriers. The ICI significantly degrades system performance and complicates the design of the receiver. In this letter… read more here.
Keywords: frequency division; non orthogonal; division multiplexing; design ... See more keywords
Comparison of DFT-S-orthogonal frequency division multiplexing and single-carrier in a radio-over-fiber system
Sign Up to like & getrecommendations! Published in 2017 at "Optical Engineering"
DOI: 10.1117/1.oe.56.9.096107
Abstract: Abstract. DFT-S-orthogonal frequency division multiplexing (OFDM) and single-carrier (SC) modulation are two typical modulation formats in radio-over-fiber (RoF) systems. They may have respective advantages and disadvantages in different scenarios. Therefore, bit error ratio comparison results… read more here.
Keywords: division multiplexing; modulation; system; frequency division ... See more keywords
A Summative Comparison of Blind Channel Estimation Techniques for Orthogonal Frequency Division Multiplexing Systems
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Electrical and Computer Engineering"
DOI: 10.11591/ijece.v8i5.pp2744-2752
Abstract: The OFDM techniquei.e. Orthogonal frequency division multiplexing has become prominent in wireless communication since its instruction in 1950’s due to its feature of combating the multipath fading and other losses. In an OFDM system, a… read more here.
Keywords: division multiplexing; estimation; blind channel; frequency division ... See more keywords
A Survey on Physical Layer Techniques and Challenges in Underwater Communication Systems
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Marine Science and Engineering"
DOI: 10.3390/jmse11040885
Abstract: In the past decades, researchers/scientists have paid attention to the physical layer of underwater communications (UWCs) due to a variety of scientific, military, and civil tasks completed beneath water. This includes numerous activities critical for… read more here.
Keywords: division multiplexing; physical layer; frequency division; orthogonal frequency ... See more keywords
SFBC Recognition over Orthogonal Frequency Division Multiplexing Schemes in the Presence of Inphase and Quadrature Phase Discrepancies for Cognitive Radio Applications
Sign Up to like & getrecommendations! Published in 2023 at "Sensors"
DOI: 10.3390/s23115267
Abstract: A radio is adaptive if it can autonomously analyze the communications environment and instantly modify its settings to achieve the best possible efficiency. In orthogonal frequency division multiplexing (OFDM) transmissions, identifying the space frequency block… read more here.
Keywords: recognition; orthogonal frequency; division multiplexing; frequency ... See more keywords
Relaxation of the Radio-Frequency Linewidth for Coherent-Optical Orthogonal Frequency-Division Multiplexing Schemes by Employing the Improved Extreme Learning Machine
Sign Up to like & getrecommendations! Published in 2020 at "Symmetry"
DOI: 10.3390/sym12040632
Abstract: A coherent optical (CO) orthogonal frequency division multiplexing (OFDM) scheme gives a scalable and flexible solution for increasing the transmission rate, being extremely robust to chromatic dispersion as well as polarization mode dispersion. Nevertheless, as… read more here.
Keywords: phase; optical orthogonal; frequency; elm ... See more keywords