Results 31 to 40 of about 140,441 (346)
IEEE Access, 2022 In the scenario of underwater acoustic communication, Orthogonal Frequency Division Multiplexing (OFDM) is widely used for its high spectral efficiency and high transmission rate.
Bai Yiqi, He Chuanlin
doaj +1 more source
International Journal of Distributed Sensor Networks, 2020 In this article, three novel systems for wireless sensor networks based on Alamouti decoding were investigated and then compared, which are Alamouti space–time block coding multiple-input single-output/multiple-input multiple-output multicarrier ...
Ahmad AA Solyman +3 more
doaj +1 more source
Orthogonal Time Sequency Multiplexing Modulation: Analysis and Low-Complexity Receiver Design [PDF]
, 2021 This paper proposes orthogonal time sequency multiplexing (OTSM), a novel single carrier modulation scheme that places information symbols in the delay-sequency domain followed by a cascade of time-division multiplexing (TDM) and Walsh-Hadamard sequence multiplexing.
arxiv +1 more source
Sensors, 2023 This paper investigates the degradation caused by interference resulting from cyclic prefix violation and symbol timing offset in narrowband power line communication systems. In this sense, it presents a unified formulation from which Hermitian symmetric
Túlio Fernandes Moreira +3 more
doaj +1 more source
Energy-efficiency improvements for optical access [PDF]
, 2014 This article discusses novel approaches to improve energy efficiency of different optical access technologies, including time division multiplexing passive optical network (TDM-PON), time and wavelength division multiplexing PON (TWDM-PON), point-to ...
Anthapadmanabhan, P +8 more
core +1 more source
Folded orthogonal frequency division multiplexing
Optics Express, 2016 We propose and demonstrate a new sub-carrier multiplexing scheme, utilizing orthogonal, periodic-sinc-shaped sub-carrier spectra. This 'folded' OFDM allows for multi-carrier bands to be generated with the precise, rectangular frequency definition of Nyquist WDM.
Bill Corcoran +3 more
openaire +3 more sources
Eigenvalue-Decomposition-Precoded Ultra-Dense Non-Orthogonal Frequency-Division Multiplexing
IEEE Transactions on Wireless Communications, 2020 This paper proposes a novel ultra-dense non-orthogonal frequency-division multiplexing (NOFDM) transmission, where subcarrier spacing is set significantly lower than that of orthogonal frequency-division multiplexing (OFDM).
Seichiroh Osaki, T. Ishihara, S. Sugiura
semanticscholar +1 more source
ADAPTIVE CYCLIC PREFIX LENGTH FOR CONVOLUITIONAL CODE OFDM SYSTEM IN FREQUENCY SELECTIVE CHANNEL
Journal of Engineering, 2023 Orthogonal Frequency Division Multiplexing (OFDM) is one of recent years multicarrier modulation used in order to combat the Inter Symbol Interference (ISI) introduced by frequency selective mobile radio channel.
Ashwaq A. Abed Aljanaby +1 more
doaj +1 more source
Random Matrix Analysis of Multiplex Networks [PDF]
, 2021 We investigate the spectra of adjacency matrices of multiplex networks under random matrix theory (RMT) framework. Through extensive numerical experiments, we demonstrate that upon multiplexing two random networks, the spectra of the combined multiplex network exhibit superposition of two Gaussian orthogonal ensemble (GOE)s for very small multiplexing ...
arxiv +1 more source
OFDM: A Mathematical Review [PDF]
, 2017 Mathematical review of the Orthogonal Frequency Division Multiplexing is demonstrated in terms of Inter symbol interference, Multi carrier modulated system and cyclic prefix.
M P Tripathi, Praveen Kumar Malik
core +2 more sources