Results 1 to 10 of about 29,940 (236)
Inward Leakage in Tight-Fitting PAPRs [PDF]
Journal of Environmental and Public Health, 2011 A combination of local flow measurement techniques and fog flow visualization was used to determine the inward leakage for two tight-fitting powered air-purifying respirators (PAPRs), the 3M Breathe-Easy PAPR and the SE 400 breathing demand PAPR. The PAPRs were mounted on a breathing machine head form, and flows were measured from the blower and into ...
Frank C. Koh +2 more
openalex +3 more sources
Frequency-Selective PAPR Reduction for OFDM [PDF]
IEEE Transactions on Vehicular Technology, 2019 We study the peak-to-average power ratio (PAPR) problem in orthogonal frequency-division multiplexing (OFDM) systems. In conventional clipping and filtering based PAPR reduction techniques, clipping noise is allowed to spread over the whole active ...
Gökceli, Selahattin +4 more
core +7 more sources
Examination of the requirements for powered air-purifying respirator (PAPR) utilization as an alternative to lockdown [PDF]
Scientific ReportsWith the emergence of COVID-19 variants and new viruses, it remains uncertain when the next pandemic will occur. A lockdown is considered the last resort to halt the spread of infection; however, it causes significant economic and social damage ...
Yusaku Fujii
doaj +2 more sources
Per Sub-band Tone Reservation Scheme for Universal Filtered Multi-Carrier Signal [PDF]
International Journal of Electronics and Telecommunications, 2023 Fifth generation (5G) applications like Internet of Things (IoT), Enhanced Mobile Broadband (eMBB), Cognitive Radios (CR), Vehicle to Vehicle (V2V) and Machine to Machine (M2M) communication put new demands on the network in terms of low latency, ultra ...
Laabidi Mounira, Bouallegue Ridha
doaj +1 more source
CE-OFDM-CDMA Phase Modulation for 5G System [PDF]
International Journal of Mathematical, Engineering and Management Sciences, 2021 In the present work, we propose a novel modulation scheme for 5G wireless communication system. Our contribution is to combine PM-OFDM (Phase Modulation Orthogonal Frequency Division Multiplexing) and CDMA (Code Division Multiple Access) to exploit their
Jamal Mestoui +4 more
doaj +1 more source
PAPR Reduction With Mixed-Numerology OFDM [PDF]
IEEE Wireless Communications Letters, 2020 Accepted for publication as a Letter in the IEEE Wireless Communications Letters in September 2019.
Selahattin Gokceli +5 more
openaire +3 more sources
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
PAPR reduction using SLM-PTS-CT hybrid PAPR method for optical NOMA waveform
Heliyon, 2023 In this article, we focus on optimising the SLM-PTS-CT (selective mapping, partial transmission sequence, circular transformation) hybrid method for optical non-orthogonal multiple access (O-NOMA) waveforms. The goal is to enhance the spectrum performance and practicality of O-NOMA systems while mitigating the PAPR issue through a hybrid approach.
Arun Kumar +5 more
openaire +3 more sources
Utilization of Compressed Sampling for PAPR Reduction in OFDM IEEE-802.11a System
Journal of Communications Software and Systems, 2021 Being spectrally efficient, easily implemented, and highly immune to selective channel imperfections and multipath fading, the Orthogonal Frequency Division Multiplexing (OFDM) can provide a sufficiently robust and high data rate modulation technique for
Hussein Al-Moukhles
doaj +1 more source
Subcarrier Filtering For Spectrally Efficient Multicarrier Modulation Schemes and Its Impact on PAPR: A Unified Approach [PDF]
International Journal of Electronics and Telecommunications, 2023 Multicarrier modulation (MCM) based schemes have been a major contributing factor in revolutionizing cellular networks due to their ability to overcome fading.
Kiran V. Shanbhag, Dayakshini Sathish
doaj +1 more source