Analysis of energy efficiency for low power transmission in WLAN with MIMO-OFDM and block ack mechanism

2006 ◽  
Author(s):  
Hoseok Choi ◽  
Sinchong Park
Keyword(s):  
Energy Efficiency ◽  
Low Power ◽  
Power Transmission ◽  
Mimo Ofdm

scholarly journals Energy Efficiency in Short and Wide-Area IoT Technologies—A Survey

Technologies ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 22
Author(s):  
Eljona Zanaj ◽  
Giuseppe Caso ◽  
Luca De Nardis ◽  
Alireza Mohammadpour ◽  
Özgü Alay ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Internet Of Things ◽  
Low Power ◽  
Energy Efficient ◽  
Wide Area ◽  
Wide Area Networks ◽  
The Internet ◽  
Extensive Review ◽  
Research Directions ◽  
The Internet Of Things

In the last years, the Internet of Things (IoT) has emerged as a key application context in the design and evolution of technologies in the transition toward a 5G ecosystem. More and more IoT technologies have entered the market and represent important enablers in the deployment of networks of interconnected devices. As network and spatial device densities grow, energy efficiency and consumption are becoming an important aspect in analyzing the performance and suitability of different technologies. In this framework, this survey presents an extensive review of IoT technologies, including both Low-Power Short-Area Networks (LPSANs) and Low-Power Wide-Area Networks (LPWANs), from the perspective of energy efficiency and power consumption. Existing consumption models and energy efficiency mechanisms are categorized, analyzed and discussed, in order to highlight the main trends proposed in literature and standards toward achieving energy-efficient IoT networks. Current limitations and open challenges are also discussed, aiming at highlighting new possible research directions.

Performance Analysis of an Area Efficient and Low Power MOD-R2MDC FFT for MIMO OFDM

2014 ◽  
Vol 573 ◽  
pp. 176-180
Author(s):  
G. Kavitha ◽  
B. Kirthiga ◽  
N. Kirubanandasarathy
Keyword(s):  
Low Power ◽  
Orthogonal Frequency Division Multiplexing ◽  
Ofdm System ◽  
Description Language ◽  
Fft Processor ◽  
Synthesis Tool ◽  
Mimo Ofdm ◽  
Hardware Description ◽  
Fft Algorithms ◽  
Area Efficient

In this paper, an area-efficient low power fast fourier transform (FFT) processor is proposed for multi input multi output-orthogonal frequency division multiplexing (MIMO-OFDM) in wireless communication system. It consists of a modified architecture of radix-2 algorithm which is described as modified radix-2 multipath delay commutation (MOD-R2MDC). The OFDM receiver with modified R2MDC (MOD-R2MDC) FFT was designed by Hardware Description Language (HDL) coding The Xilinx ISE Design Suite 10.1 is used as a synthesis tool for getting the power and area. The Model-Sim 6.3c is used for simulation. Also the existing OFDM system has been tested with these FFT algorithms and their performances were analyzed with respect to occupancy area in FPGA and power consumption. A low-power and area efficient architecture enables the real-time operations of MIMO OFDM system.

A Novel Approach for Supplying Wireless Energy to Multiple Devices Simultaneously Using Sweeping Effect

2014 ◽  
pp. 43-58
Author(s):  
Askin Erdem Gundogdu ◽  
Erkan Afacan
Keyword(s):  
Energy Efficiency ◽  
High Efficiency ◽  
Power Transmission ◽  
Transmission Range ◽  
Transfer System ◽  
Wireless Power ◽  
Efficiency Loss ◽  
Novel Approach ◽  
Multiple Devices ◽  
Sweeping Effect

There has been great interest in wireless power transmission since 2007 when a novel approach was presented by a group of scientists at MIT. With this new technique, power transmission range is possible for a couple of meters with high efficiency; however, to be able to use this technique in our lives with high efficiency and long transfer range, small structured devices and new design techniques are strongly required. In this chapter, the investigation on supplying energy by sweeping was presented. The experimental results claim that energy could be supplied to multiple devices almost at the same time. If the range of chosen frequency increases, the number of devices could be increased as well, considering slight energy efficiency loss in the transfer system. The authors hope that the proposed technique gives inspiration to the designers and to the market.

scholarly journals Level Converters for Ultra Low Power IoT Applications

2018 ◽  
Vol 7 (2.16) ◽  
pp. 19
Author(s):  
T Yugendra Chary ◽  
S Anitha ◽  
M Alamillo ◽  
Ameet Chavan
Keyword(s):  
Energy Efficiency ◽  
Low Power ◽  
Slight Reduction ◽  
Dramatic Improvement ◽  
Modest Improvement ◽  
Ultra Low Power ◽  
Iot Applications ◽  
Communication Devices ◽  
And Performance ◽  
Level Converter

For efficient ultra-low power IoT applications, working with various communication devices and sensors which operating voltages  from subthreshold to superthreshold levels which requires wide variety of robust level converters for signal interfacing with low power dissipation. This paper proposes two topologies of level converter circuits that offer dramatic improvement in power and performance when compared to the existing level converters that shift signals from sub to super threshold levels for IoT applications. At 250 mV, the first proposed circuit - a modification of a tradition al current mirror level converter - offers the best energy efficiency with approximately seven times less energy consumption per operation than the existing design, but suffers from a slight reduction in performance.  However, a second proposed circuit - based on a two-stage level converter - at the same voltage enhances performance by several orders of magnitude while still maintaining a modest improvement in energy efficiency.  The Energy Delay Products (EDP) of the two proposed designs are equivalent and are approximately four times better than the best existing design.  Consequently, the two circuit options either optimizes power or performance with improved overall EDP.  

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