Results 41 to 50 of about 102,128 (193)
A Comparison of CP-OFDM, PCC-OFDM and UFMC for 5G Uplink Communications
, 2018 Polynomial-cancellation-coded orthogonal frequency division multiplexing (PCC-OFDM) is a form of OFDM that has waveforms which are very well localized in both the time and frequency domains and so it is ideally suited for use in the 5G network.
Armstrong, Jean +3 more
core +1 more source
A new technique for OFDM: OFDM-index modulation
2013 21st Signal Processing and Communications Applications Conference (SIU), 2013 In this study, a novel scheme called orthogonal frequency division multiplexing with index modulation (OFDM-IM) is proposed for frequency selective channels. In this scheme, the information is conveyed not only by only M-ary signal constellations as in classical OFDM, but also by the indices of the active subcarriers, which are determined according to ...
Basar, Ertuğrul +2 more
openaire +3 more sources
A Novel Data-Aided Channel Estimation with Reduced Complexity for TDS-OFDM Systems [PDF]
, 2012 In contrast to the classical cyclic prefix (CP)-OFDM, the time domain synchronous (TDS)-OFDM employs a known pseudo noise (PN) sequence as guard interval (GI).
Crussière, Matthieu +2 more
core +5 more sources
Reverse polarity optical-OFDM (RPO-OFDM): dimming compatible OFDM for gigabit VLC links
Optics Express, 2013 Visible light communications (VLC) technology permits the exploitation of light-emitting diode (LED) luminaries for simultaneous illumination and broadband wireless communication. Optical orthogonal frequency-division multiplexing (O-OFDM) is a promising modulation technique for VLC systems, in which the real-valued O-OFDM baseband signal is used to ...
Hany, Elgala, Thomas D C, Little
openaire +2 more sources
Performance degradation due to multipath noise for narrowband OFDM systems: channel-based analysis and experimental determination [PDF]
, 2015 The performance of OFDM systems over a multipath channel can strongly degrade due to the propagation delay spread. The distortion of the received signal over the fast Fourier transform window is referred to as multipath noise.
Heereman, Frédéric +4 more
core +2 more sources
A way of decreasing the reliability of new OFDM data link
Dianzi Jishu Yingyong, 2021 A new OFDM data link model based on OCML is proposed to solve the problem of reliability of data link of air-to-ground radar. The above model uses OCML spatiotemporal chaotic sequence to improve CCSK soft spread spectrum, and simulates with coding and ...
Su Yuhang +3 more
doaj +1 more source
Pedestrians effects on indoor MIMO-OFDM channel capacity [PDF]
, 2009 Temporal variations caused by pedestrian movement can significantly affect the channel capacity of indoor MIMOOFDM wireless systems. This paper compares systematic measurements of MIMO-OFDM channel capacity in presence of pedestrians with predicted MIMO ...
Das Gupta, Jishu, Ziri-Castro, Karla
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Duality of antennas and subcarriers in massive MIMO-OFDM downlink system [PDF]
, 2015 Massive multiple-input-multiple-output (MIMO) can significantly outperform conventional MIMO in terms of spectrum efficiency and link reliability. For massive MIMO, there are still theoretical and practical issues that have to be addressed.
Bannour, Ahmed, Sun, Yichuang
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International Journal of Technology, 2021 The bi-orthogonal codes for embedding Side-Information (SI) in data-based blind SLM (BSLM) proposed in Joo et al. (2012) produce better bit error rate (BER) and SI error rate (SIER) performance compared to binary codes.
Adnan Haider Yusef Sa'd +2 more
doaj +1 more source
Data-derived iterative channel estimation with channel tracking for a mobile fourth generation wide area OFDM system [PDF]
, 2003 In this paper an iterative channel estimation technique for a mobile fourth generation coherent orthogonal frequency division multiplexing (OFDM) system is proposed. Coherent detection dictates that a per-subband estimate of the frequency response of the
Dowler, ASH, McGeehan, JP, Nix, AR
core +2 more sources