Results 231 to 240 of about 63,008 (302)

A Novel Wider Range Modulation for Indirect Matrix Converter Utilizing Delta-Sigma and Space Vector

IEEE transactions on power electronics, 2023
The coupling between the rectifier and inverter makes the modulation of the indirect matrix converter (IMC) relatively complicated. A novel modulation method is proposed in this letter, where a space vector modulation without a zero-voltage vector, which
Chaolei Ma, T. Shi, Zhichen Lin, Zhanqing Zhou, C. Xia   +4 more
semanticscholar   +1 more source

Probabilistic shaping-based delta sigma modulation.

Optics Letters, 2023
This Letter proposes a probabilistic shaping delta-sigma modulation technique. By performing delta-sigma modulation on the probability shaping signal at the transmitting end, under the same transmit power and the same net bit rate, the delta-sigma ...
Li Zhao, Sicong Xu, Mingxu Wang, Bohan Sang, J. Long, Long Zhang, Wen Zhou, Kaihui Wang, Jianjun Yu   +8 more
semanticscholar   +1 more source

Oversampled Sigma-Delta Modulation

IEEE Transactions on Communications, 1987
Summary: 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 ...
openaire   +1 more source

Sigma-Delta Modulation

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
openaire   +1 more source

NTF-Improved Delta-Sigma Modulation Supported 65536 QAM Signal for Mobile Fronthaul

Journal of Lightwave Technology
In this article, a support 65536 QAM signal mobile fronthaul (MFH) architecture based on the noise transfer function (NTF)-improved delta-sigma modulation (DSM) was proposed and demonstrated by experiment. In the NTF-improved DSM, the extended Lee's rule
Xiongwei Yang, Jianjun Yu, Xianmin Zhao, Yi Wei, F. Zhao, Wen Zhou, Kaihui Wang   +6 more
semanticscholar   +1 more source

4096-QAM Signal Transmission by an IM/DD System at THz Band Using Delta-Sigma Modulation

IEEE Photonics Technology Letters
The transmission of high-order quadrature amplitude modulation (QAM) signals in a low-cost intensity-modulated direct detection (IM/DD) THz-band communication system at 300 GHz is experimentally demonstrated in this letter. The system employs delta-sigma
Jingwen Tan, Jianyu Long, Jianjun Yu, Xiongwei Yang, Jiaxuan Liu, Peng Tian, Sicong Xu, Yang Han, Bing Zhang, Yao Zhang   +9 more
semanticscholar   +1 more source

Secure transmission in a W-band RoF system based on delta-sigma modulation.

Optics Letters
In this Letter, a delta-sigma modulation (DSM) encryption technique in a W-band RoF system is proposed. By performing DSM with different over-sample ratios (OSRs) on the OFDM signal based on the controlled keys generated by the chaotic system at the ...
Yaoqiang Xiao, Chunxi Zhou, Linrong Jiang, Zhaoyu An, Yuqing Li   +4 more
semanticscholar   +1 more source

Synchronization of Sigma Delta Modulators

2012
The paper deals with the synchronization of two chaotic Sigma-Delta Modulators. The synchronization is reached via two modulators: one of the modulators is used to code the input information into a bitstream, while the second demodulator is used to decode the obtained bitstream into the original state of the applied input signal.
Tsenov, G., Mladenov, Valeri, Taralova, Ina   +2 more
openaire   +2 more sources

Sigma-Delta Modulation Based Single-bit Adaptive DSP Algorithms for Efficient Mobile Communication

Circuits, systems, and signal processing, 2020
A. Pathan, T. Memon
semanticscholar   +1 more source

One-Bit Sigma-Delta DFRC Waveform Design: Using Quantization Noise for Radar Probing

ICC 2025 - IEEE International Conference on Communications
Dual-functional radar-communication (DFRC) signal design has received much attention lately. We consider the scenario of one-bit massive multi-input multi-output (MIMO) wherein one-bit DACs are employed for the sake of saving hardware costs. Specifically,
Wai-Yiu Keung, Hei Victor Cheng, Wing-Kin Ma   +2 more
semanticscholar   +1 more source