Results 271 to 280 of about 59,486 (332)
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Optics Letters, 2023
We propose a digital-delta-sigma-modulation radio-over-fiber (DDSM-RoF) scheme for wireless fronthaul and validate it experimentally in a D-band photonics-aided RoF transmission system.
Mingxu Wang +12 more
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We propose a digital-delta-sigma-modulation radio-over-fiber (DDSM-RoF) scheme for wireless fronthaul and validate it experimentally in a D-band photonics-aided RoF transmission system.
Mingxu Wang +12 more
semanticscholar +1 more source
Oversampled Sigma-Delta Modulation
IEEE Transactions on Communications, 1987Summary: Oversampled sigma-delta modulation has been proposed as a practical implementation for high rate analog-to-digital conversion because of its simplicity and its robustness against circuit imperfections. To date, mathematical developments of the basic properties of such systems have been based either on simplified continuous-time approximate ...
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Trellis Sigma-Delta Modulation
2011Chapter seven presents a full analysis of the Trellis sigma-delta modulation algorithm. This algorithm is the first pruned look-ahead sigma-delta modulation algorithm found in literature. It is a derivative of the full look-ahead algorithm and uses concepts from Trellis (Viterbi) decoding, hence the name. In the Trellis sigma-delta modulation algorithm,
Janssen, Erwin, van Roermund, Arthur
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Switched current sigma-delta modulators
1995 International Symposium on VLSI Technology, Systems, and Applications. Proceedings of Technical Papers, 2002Oversampling sigma-delta (/spl Sigma//spl Delta/) modulators using switched current (SI) techniques are presented. The first modulator is a 1-1 MASH modulator. The second structure is a second-order loop which is formed by a 1-bit quantizer with two feedback loops.
A. Yilmaz, K.C. Wong, K.S. Chao
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Digital Filters for Sigma-Delta Modulation in Wireless Communications
International Semiconductor Conference, 2019This paper presents the effect of digital filtering in a sigma-delta modulation (SDM) used in wireless communications. SDM is widely used in digital-to-analog conversion because it offers high signal to noise ratio and distortion rate and low power and ...
I. Pirnog +3 more
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65,536-QAM OFDM signal transmission over a fiber-THz system at 320 GHz with delta-sigma modulation.
Optics Letters, 2023The transmission of a 65,536-ary quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) signal supported by a hybrid fiber-terahertz (THz) multiple-input multiple-output (MIMO) system at 320 GHz is experimentally ...
Junting Shi +8 more
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2017
This chapter presents a theoretical overview of analog to digital conversion using Sigma-Delta Modulation (ΣΔM). Its oversampling characteristic and working principles are explained and compared with Nyquist rate converters. Important performance parameters, such as signal to noise ratio (SNR), effective number of bits (ENOB), and oversampling ratio ...
David Fouto, Nuno Paulino
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This chapter presents a theoretical overview of analog to digital conversion using Sigma-Delta Modulation (ΣΔM). Its oversampling characteristic and working principles are explained and compared with Nyquist rate converters. Important performance parameters, such as signal to noise ratio (SNR), effective number of bits (ENOB), and oversampling ratio ...
David Fouto, Nuno Paulino
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Sigma Delta Modulator Design Automation
2007 International Conference on Communications, Circuits and Systems, 2007Sigma delta modulator design automation from system to circuit is presented in this paper. The sigma delta modulator design flow is separated into the system and circuit level design. It often adopts Matlab Simulink for the system level design and utilizes circuit simulator Spectre for the circuit level design.
null Chung-Ming Hsieh +1 more
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4096-QAM OFDM THz-Over-Fiber MIMO Transmission Using Delta-Sigma Modulation
IEEE Photonics Technology Letters, 2023A terahertz (THz)-over-fiber multiple-input multiple-output (MIMO) transmission of 4096-ary quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) supported by 46-GBaud quadrature phase shift keying (QPSK) signal at 320 ...
Junting Shi +7 more
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2018Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO), 2018
The article deals with the problem of increasing the efficiency of EER transmitters. The results of computer simulation of the EER power amplifier using transistors made by common MOSFET and advanced GaN technology in the form of graphs: the dependence ...
A. O. Bolotov +2 more
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The article deals with the problem of increasing the efficiency of EER transmitters. The results of computer simulation of the EER power amplifier using transistors made by common MOSFET and advanced GaN technology in the form of graphs: the dependence ...
A. O. Bolotov +2 more
semanticscholar +1 more source