Advanced OTFS communication system with compact spectrum and power efficiency improvement

2021 ◽  
Author(s):  
Md. Najmul Hossain ◽  
Heung‐Gyoon Ryu
Keyword(s):  
Communication System ◽  
Power Efficiency ◽  
Efficiency Improvement ◽  
Compact Spectrum

scholarly journals High Step-Up Converter Based on Non-Series Energy Transfer Structure for Renewable Power Applications

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 689
Author(s):  
Luis Humberto Diaz-Saldierna ◽  
Jesus Leyva-Ramos
Keyword(s):  
Power Efficiency ◽  
Common Ground ◽  
Linear Models ◽  
Efficiency Improvement ◽  
Boost Converters ◽  
Renewable Power ◽  
Current Design ◽  
Alternative Sources ◽  
Transfer Structure ◽  
Laboratory Prototype

In this paper, a high step-up boost converter with a non-isolated configuration is proposed. This configuration has a quadratic voltage gain, suitable for processing energy from alternative sources. It consists of two boost converters, including a transfer capacitor connected in a non-series power transfer structure between input and output. High power efficiencies are achieved with this arrangement. Additionally, the converter has a common ground and non-pulsating input current. Design conditions and power efficiency analysis are developed. Bilinear and linear models are derived for control purposes. Experimental verification with a laboratory prototype of 500 W is provided. The proposed configuration and similar quadratic configurations are compared experimentally using the same number of components to demonstrate the power efficiency improvement. The resulting power efficiency of the prototype was above 95% at nominal load.

A Method to Improve Switching Power Supply Efficiency at Light Load with DSP Control

2016 ◽  
Vol 698 ◽  
pp. 133-141
Author(s):  
Chuan Gao ◽  
Guang Lei Jin ◽  
Ri Chen Jiang ◽  
Mu Rong Li ◽  
Masashi Ochiai ◽  
...  
Keyword(s):  
Power Supply ◽  
Power Efficiency ◽  
Control Method ◽  
Efficiency Improvement ◽  
Switching Power Supply ◽  
Power Circuit ◽  
Switching Power ◽  
Light Load ◽  
Result Show ◽  
Dsp Control

This paper discusses a digital control method for efficiency improvement of switching power circuit at light load by using C2000 Series DSP (Texas Instruments Inc.). In this work, we alter the module in DSP to adjust the link voltage between a bridgeless PFC AC/DC converter and a phase shift full bridge DC/DC converter, as well as to control the PWM frequency of power circuit in order to improve the power efficiency in a suitable way. Our experiments result show that the efficiency of the power circuit at half or light load improves by adjusting the link voltage and/or PWM frequency

Clock control strategy of four-phase Dickson charge pump for power efficiency improvement

2008 ◽  
Author(s):  
Kai Yu ◽  
Xuecheng Zou ◽  
Dongsheng Liu ◽  
Guoyi Yu ◽  
Jianming Lei ◽  
...  
Keyword(s):  
Control Strategy ◽  
Power Efficiency ◽  
Charge Pump ◽  
Efficiency Improvement

Power Efficiency Improvement of White Phosphorescent Organic Light-Emitting Diode with Thin Double-Emitting Layers and Hole-Trapping Mechanism

2011 ◽  
Vol 50 (4S) ◽  
pp. 04DK04 ◽  
Author(s):  
Fuh-Shyang Juang ◽  
Lin-Ann Hong ◽  
Shun-Hsi Wang ◽  
Yu-Sheng Tsai ◽  
Ming-Hong Gao ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Light Emitting Diode ◽  
Efficiency Improvement ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Trapping Mechanism ◽  
Hole Trapping ◽  
Organic Light

Power efficiency improvement of the full bridge current resonant DC-DC converter

2011 ◽  
Author(s):  
Hisatsugu Kato ◽  
Hirofumi Matsuo ◽  
Tsubasa Ito ◽  
Shuhei Kawazu ◽  
Daiki Kawahara ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Efficiency Improvement

Power efficiency improvement by PAPR reduction and predistorter in MIMO-OFDM system

2005 ◽  
Author(s):  
N.T.T. Trang ◽  
Taeyoung Han ◽  
Nam Kim
Keyword(s):  
Power Efficiency ◽  
Papr Reduction ◽  
Efficiency Improvement ◽  
Ofdm System ◽  
Mimo Ofdm

scholarly journals Efisiensi Daya Protokol Quantize and Forward Pada Sistem Komunikasi Kooperatif Multi-relay

2017 ◽  
Vol 13 (1) ◽  
pp. 57
Author(s):  
Nasaruddin Nasaruddin ◽  
Rony Kurnia ◽  
Ramzi Adriman
Keyword(s):  
Cooperative Communication ◽  
Communication System ◽  
Power Efficiency ◽  
High Performance ◽  
Wireless Channel ◽  
Amplify And Forward ◽  
Distance Ratio ◽  
Diversity Techniques ◽  
System A ◽  
Single Relay

One of effective diversity techniques to combat fading on wireless channel is a cooperative communication system in which a source sends information through several relays and then forward it to a destination. A cooperative communication system has shown increased the system performance and reduced the energy consumption. However, it depends on the used relay mechanism that is relay protocols such as quantize and forward (QF) and amplify and forward (AF). In the previous research, energy efficiency of AF relay has investigated for a single-relay cooperative system, but multi-relay is more practical. Therefore, this research focuses on power efficiency in multi-relay cooperative communication system using QF protocol. The research method used is mathematical analysis and computer simulation for outage probability and power efficiency in the multi-relay QF. Simulation result found that multi-relay QF system could provide a high power efficiency, but the efficiency is reduced when the distance ratio increases. Power efficiency can be increased by adding the number of relays in the system. A comparison of power efficiency for QF and AF protocols has simulated, in which power efficiency of multi-relay QF is higher than that of multi-relay AF at distance ratio and power transmit. Thus, multi-relay QF system can provide high performance and power efficiency in the cooperative communication system.

scholarly journals Hybrid DC-DC Converter For Power Efficiency Improvement Operating Over a Wide Load Power

2016 ◽  
Vol 20 (9) ◽  
pp. 1763-1770
Author(s):  
Ki-Chan Woo ◽  
Jin-Won Mok ◽  
Tae-Woo Kim ◽  
Seon-Kwang Hwang ◽  
Byung-Do Yang
Keyword(s):  
Power Efficiency ◽  
Efficiency Improvement ◽  
Load Power
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