Results 91 to 100 of about 24,346 (205)
Canadian journal of respiratory therapy : CJRT = Revue canadienne de la therapie respiratoire : RCTR, 2014 The present outbreak of Ebola has health care professionals seeking guidance on isolation precautions for routine care and aerosol-generating procedures (AGPs). The most recent guidelines state that during AGPs, health care professionals should wear respiratory protection at least as protective as a National Institute for Occupational Safety and Health-
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Fractional Fourier Domain PAPR Reduction
GLOBECOM 2025 - 2025 IEEE Global Communications ConferenceHigh peak-to-average power ratio (PAPR) has long posed a challenge for multi-carrier systems, impacting amplifier efficiency and overall system performance. This paper introduces dynamic angle fractional Fourier division multiplexing (DA-FrFDM), an innovative multi-carrier system that effectively reduces PAPR for both QAM and Gaussian signals with ...
Yewen Cao, Yulin Shao, Rose Qingyang Hu
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The PAPR and Simple PAPR Reduction of the 2D Spreading Based Communication Systems
Radioengineering, 2010 This paper deals with Peak to Average Power Ra- tio (PAPR) characteristics and the theory of variable spread- ing factor orthogonal frequency and code division multiplex- ing (VSF-OFCDM) systems. Comparison and evaluation of PAPR of VSF-OFCDM systems with various 2D spreading factors (SF) are done in time and in frequency domain.
Blumenstein, Jiri, Fedra, Zbynek
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APR Reduction Technique based on OFDM Pilot Filter Bank Limiting for Satellite Mobile Communications
MATEC Web of Conferences, 2018 Combined with OFDM (Orthogonal Frequency Division Multiplexing), satellite mobile communications will effectively achieve on-demand communication in areas with an ultra-low density of users.
Dai Tianfang
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PAPR Reduction of OTSM with Random and Orthogonal SLM Phase Sequences and its Recovery in the Presence of EPA, EVA and ETU Channel Models [PDF]
RadioengineeringTo overcome the high peak-to-average-power ratio (PAPR) in orthogonal time sequency multiplexing (OTSM), this document proposes orthogonal and random selective mapping phase vectors (OSLM and RSLM) after some modifications to be applicable with OTSM ...
M. I. Al-Rayif
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IEEE AccessThis paper proposes a peak-to-average power ratio (PAPR) reduction method that utilizes the null space in a multiple-input multiple-output (MIMO) channel for downlink MIMO-orthogonal frequency division multiplexing (OFDM) signals with multiple-antenna ...
Asuka Kakehashi +2 more
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On PAPR reduction in pilot-assisted optical OFDM communication systems [PDF]
, 2017 Ogunkoya, Funmilayo B. +2 more
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The Impact of OFDM-IM System Parameters on the Performance of the SLM PAPR Reduction Technique
NTU Journal of Engineering and TechnologyOrthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) is an effective communication technology that utilizes subcarrier indices to transmit information in addition to the information traditionally modulated on active subcarriers ...
Zainab Mohammed Abdulkareem +2 more
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PAPR Reduction Solutions for 5G and Beyond.
, 2023 The latest fifth generation (5G) wireless technology provides improved communication quality compared to earlier generations. The 5G New Radio (NR), specified by the 3rd Generation Partnership Project (3GPP), addresses the modern requirements of the wireless networks and targets improved communication quality in terms of for example peak data rates ...
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