Results 41 to 50 of about 29,078 (117)

Research on Real-time Free-Space Optical Transmission Experiment Demonstration based on Delta-Sigma Modulation

Guangtongxin yanjiu, 2023
To simplify the structure of real-time coherent Free-Space Optical (FSO) / wireless systems and reduce costs, this paper implements a low-cost FSO system based on bandpass Delta-Sigma Modulation (DSM) technology. A 256-ary Quadrature Amplitude Modulation
WANG Zhong-zhong, AO Xue-yuan, YANG Qi
doaj  

METHODS FOR IMPROVING METROLOGICAL PARAMETERS OF ΣΔ-ADC

Измерение, мониторинг, управление, контроль
Background. ADC / DAC are one of the main elements of modern technical systems and, in general, most digital devices that interact with the environment.
A.G. Dmitrienko, K.Yu. Piskaev, K.V. Gudkov, M.V. Tyurin   +3 more
doaj   +1 more source

A novel approach toward optimized image processing using sigma delta modulation

Mehran University Research Journal of Engineering and Technology
Image processing has widespread uses practically in every branch of science and arts. Processing images is more difficult than processing sound or data as there are more bits in the high pixel quality image.
Aneela Pathan, Tayab D Memon, Rizwan Aziz, Syed Haseeb Shah   +3 more
doaj   +1 more source

A Second-Order True-VCO ADC Employing a Digital Pseudo-DCO Suitable for Sensor Arrays

Sensors
This paper explores the implementation of a VCO-based ADC, achieving an ENOB of 12 bits with 1 MHz of a sampling rate in the audio bandwidth. The solution exploits the scalability and PVT invariance of a novel digital-to-frequency converter to reduce the
Dante Loi, Victor Medina, Luis Hernandez Corporales   +2 more
doaj   +1 more source

Acoustic energy distribution in space around the pipe outlet

Archives of Acoustics, 2014
The class-D power amplifiers which operate in a switched mode have become an attractive alternative of the conventional analog power amplifiers class-A, B and AB in the field of audio applications.
Zbigniew KULKA
doaj  

A digital prediction compensation for DR improvement in CT DSM with digital noise coupling

Electronics Letters
This paper presents a prediction‐based dynamic range (DR) compensation technique in continuous‐time (CT) delta ‐sigma modulator (DSM) with digital‐domain noise coupling (DNC) structure.
Jiaxi Pang, Xilong Ou, Qiang Li
doaj   +1 more source

Towards energy-efficient massive MIMO-NOMA systems with sigma-delta ADCs and group SIC detection. [PDF]

Sci Rep
Farghaly SI, Khafaga MM, Khamis S.
europepmc   +1 more source

EEG Spectral Analysis of Tinnitus Sound Therapy: Meta-Analysis. [PDF]

J Otol
Wang X, Liu S, Jia Y, Chen B, Qin H, Li X.   +5 more
europepmc   +1 more source

Effects of lemborexant and zolpidem on sleep electroencephalography in older adults with insomnia: a randomized trial. [PDF]

Sleep Adv
Sattari N, Dave A, Niknazar H, Chen IY, Neikrug AB, Mander BA, Benca RM.   +6 more
europepmc   +1 more source