Results 1 to 10 of about 29,227 (261)
Broad-spectrum antiviral activity of the sigma-1 receptor antagonist PB28 against coronaviruses [PDF]
Frontiers in MicrobiologyThe continuous evolution of coronaviruses poses persistent and severe threats to both human and animal health. While α- and β-coronaviruses mainly infect mammals, including humans, γ-coronaviruses predominantly infect poultry, causing substantial ...
Gaojie Song +10 more
doaj +2 more sources
Multiband sigma-delta modulation
Electronics Letters, 1993 A sigma-delta modulation architecture which breaks the signal band into smaller bands and uses a different band reject noise shaping transfer function per band is described. Operating at 1.024 MHz and 64 kHz signal bandwidth with 2nd order modulators, the resolution of the architecture is 4.5 bits higher than that of a standard 2nd order sigma delta ...
H Sorensen, J Van Der Spiegel
exaly +2 more sources
Multi-frequency Phase Laser Ranging based on Delta-Sigma Modulation
Guangtongxin yanjiu, 2022 In order to solve the problem that the laser satellite terminal can realize the ranging function while completing the communication function, this paper designs a method based on the Delta-Sigma modulation to realize the laser phase ranging, which can ...
Jin-xin ZUO +6 more
doaj +3 more sources
Information, 2021 This work combines compressive sensing and short word-length techniques to achieve localization and target tracking in wireless sensor networks with energy-efficient communication between the network anchors and the fusion center.
Nuha A. S. Alwan, Zahir M. Hussain
doaj +1 more source
Optimal Design of Mobile Fronthaul Delta-Sigma Modulator based on Search Algorithm
Guangtongxin yanjiu, 2022 The Common Public Radio Interface (CPRI) used in mobile fronthaul has low spectrum efficiency. In this paper, we propose to use Delta-Sigma Modulation (DSM) technology as a new fronthaul interface.
WU Zi-qiang +3 more
doaj +3 more sources
On the stability of sigma delta modulators [PDF]
IEEE Transactions on Signal Processing, 1993 A framework for stability analysis of sigma-delta modulators is presented. It is argued that limit cycles for constant inputs are natural objects to investigate in this context. A number of analytical and approximate techniques to aid the stability analysis of the double loop and interpolative modulators are discussed and lead to ways of improving the ...
Søren Hein, Avideh Zakhor
openaire +1 more source
Experimental characterization of Sigma Delta Radio over fiber system for 5G C-RAN downlink
ICT Express, 2020 Radio over Fiber is a promising technology for the 5G Cloud Radio Access Network. We demonstrate experimentally Sigma Delta Radio over Fiber by means of Sigma Delta Modulator (SDM) subsequently replacing expensive digital to analog converters.
Muhammad Usman Hadi +3 more
doaj +1 more source
Noise Floor Reduction in Frequency Delta-Sigma Modulation Microphone Sensors
Sensors, 2021 Frequency delta-sigma modulator (FDSM) employing a variable frequency oscillator is a novel replacement of the classical delta-sigma modulators. This is advantageous for application to sensors, because an ADC can be intrinsically integrated with the ...
Koichi Maezawa +2 more
doaj +1 more source
Impulsive Sound Detection Directly in Sigma-Delta Domain
Archives of Acoustics, 2017 Recent implementations of Sigma-delta converters have achieved low cost, low power consumption and high integration while maintaining resolution as high as in Nyquist-rate converters.
Igor Dantas dos Santos MIRANDA +1 more
doaj +1 more source
Digital OFDM-PON Based on Delta–Sigma Modulation Employing Binary IM-DD Channels
IEEE Photonics Journal, 2017 In this paper, a delta–sigma modulation is proposed for the orthogonal frequency division multiplexed-passive optical network (OFDM-PON) to enable transmission of OFDM signals via binary intensity modulation and direct detection (IM-DD) channels ...
Cai Li +5 more
doaj +1 more source