scholarly journals Performance Analysis of Quantized Feedback JLS Precoder in CoMP transmission

2016 ◽  
Vol 5 (3) ◽  
pp. 146
Author(s):  
Yasmine Fahmy
Keyword(s):  
Performance Analysis ◽  
High Performance ◽  
Mobile Station ◽  
Base Stations ◽  
Linear Precoding ◽  
Finite Capacity ◽  
Feedback Channel ◽  
Quantized Feedback ◽  
User Data ◽  
Rate Loss

Joint Processing (JP) in Coordinated Multi-Point (CoMP) transmission allows user data to be jointly processed by several interfering base stations to achieve high performance and large capacity gain. This is achieved by making use of timing advance mechanisms; to ensure that the desired signals from the cooperating cells reach the mobile station at exactly the same time. The Joint Leakage Suppression (JLS) precoder is a suitable linear precoding scheme in this scenario. In this paper, JLS performance analysis is considered under real assumptions such as the presence of asynchronous reception of the interfering signals and the effect of the finite capacity backhaul links. The effect of quantizing the feedback channel on the sum rate is derived, and a tight upper bound of the rate loss due to quantization is obtained. Simulation results are provided to validate these results.

CHASSIS DESIGN & PERFORMANCE ANALYSIS FOR THE EUROPEAN EXOMARS ROVER

2005 ◽  
Vol 29 (4) ◽  
pp. 507-517
Author(s):  
Alex Ellery ◽  
Lutz Richter ◽  
Reinhold Bertrand
Keyword(s):  
Performance Analysis ◽  
Weight Distribution ◽  
High Performance ◽  
High Mobility ◽  
Scientific Instrument ◽  
Equal Weight ◽  
Scientific Instruments ◽  
Design Issues ◽  
Martian Surface ◽  
Considerable Size

The European Space Agency’s (ESA) ExoMars rover has recently been subject to a Phase A study led by EADS Astrium, UK. This rover mission represents a highly ambitious venture in that the rover is of considerable size ~200+kg with high mobility carrying a highly complex scientific instrument suite (Pasteur) of up to 40 kg in mass devoted to exobiological investigation of the Martian surface and sub-surface. The chassis design has been a particular challenge given the inhospitable terrain on Mars and the need to traverse such terrain robustly in order to deliver the scientific instruments to science targets of exobiological interest, We present some of the results and design issues encountered during the Phase A study related to the chassis. In particular, we have focussed on the overall tractive performance of a number of candidate chassis designs and selected the RCL (Science & Technology Rover Company Ltd in Russian) concept C design as the baseline option in terms of high performance with minimal mechanical complexity overhead. This design is a six-wheeled double-rocker bogie design to provide springless suspension and maintain approximately equal weight distribution across each wheel.

Design of Solar System for LTE Networks

2020 ◽  
Vol 11 (2) ◽  
pp. 1-15
Author(s):  
Naglaa Kamel Bahgaat ◽  
Nariman Abdel Salam ◽  
Monika Mady Roshdy ◽  
Sandy Abd Elrasheed Sakr
Keyword(s):  
Mobile Networks ◽  
Renewable Energy Sources ◽  
Mobile Station ◽  
Electrical Energy ◽  
Environmental Problems ◽  
Base Stations ◽  
Energy Sources ◽  
Solar Panels ◽  
Lte Networks ◽  
Photovoltaic Panel

Rapid growth in mobile networks and the increase of the number of cellular base stations requires more energy sources, but the traditional sources of energy cause pollution and environmental problems. Therefore, modern facilities tend to use renewable energy sources instead of traditional sources. One renewable source is the photovoltaic panel, which made from semiconductor materials which absorb sunlight to generate electricity. This article discusses the importance of using solar panels to produce energy for mobile stations and also a solution to some environmental problems such as pollution. This article provides a design for a solar-power plant to feed the mobile station. Also, in this article is a prediction of all loads, the power consumed, the number of solar panels used, and solar batteries can be used to store electrical energy. Finally, an estimation of the costs of all components will be presented. Good discussion and conclusion will be presented about the results obtained. The results obtained are promising. In addition, a future plan is described to complete this important study.

scholarly journals Non-Line-of-Sight Error Mitigation in Wireless Communication Systems

2011 ◽  
Vol 1 ◽  
pp. 173-177
Author(s):  
Szu Lin Su ◽  
Yi Wen Su ◽  
Ho Nien Shou ◽  
Chien Sheng Chen
Keyword(s):  
Communication Systems ◽  
Hybrid Methods ◽  
Mobile Station ◽  
Base Stations ◽  
Superior Performance ◽  
Line Of Sight ◽  
Time Of Arrival ◽  
Angle Of Arrival ◽  
Error Statistics ◽  
Non Line Of Sight

When there is non-line-of-sight (NLOS) path between the mobile station (MS) and base stations (BSs), it is possible to integrate many kinds of measurements to achieve more accurate measurements of the MS location. This paper proposed hybrid methods that utilize time of arrival (TOA) at five BSs and angle of arrival (AOA) information at the serving BS to determine the MS location in NLOS environments. The methods mitigate the NLOS effect simply by the weighted sum of the intersections between five TOA circles and the AOA line without requiring priori knowledge of NLOS error statistics. Simulation results show that the proposed methods always give superior performance than Taylor series algorithm (TSA) and the hybrid lines of position algorithm (HLOP).

High-Performance Analysis of Recessed Gate AlN/β-Ga2O3 HEMT

2021 ◽  
Author(s):  
Tushar Shivam ◽  
B S Saini ◽  
Ramesh K Sunkaria ◽  
Ravi Ranjan
Keyword(s):  
Performance Analysis ◽  
High Performance ◽  
Recessed Gate

Design of Solar System for LTE Networks

2021 ◽  
pp. 416-432
Author(s):  
Naglaa Kamel Bahgaat ◽  
Nariman Abdel Salam ◽  
Monika Mady Roshdy ◽  
Sandy Abd Elrasheed Sakr
Keyword(s):  
Mobile Networks ◽  
Renewable Energy Sources ◽  
Mobile Station ◽  
Electrical Energy ◽  
Environmental Problems ◽  
Base Stations ◽  
Energy Sources ◽  
Solar Panels ◽  
Lte Networks ◽  
Photovoltaic Panel

Rapid growth in mobile networks and the increase of the number of cellular base stations requires more energy sources, but the traditional sources of energy cause pollution and environmental problems. Therefore, modern facilities tend to use renewable energy sources instead of traditional sources. One renewable source is the photovoltaic panel, which made from semiconductor materials which absorb sunlight to generate electricity. This article discusses the importance of using solar panels to produce energy for mobile stations and also a solution to some environmental problems such as pollution. This article provides a design for a solar-power plant to feed the mobile station. Also, in this article is a prediction of all loads, the power consumed, the number of solar panels used, and solar batteries can be used to store electrical energy. Finally, an estimation of the costs of all components will be presented. Good discussion and conclusion will be presented about the results obtained. The results obtained are promising. In addition, a future plan is described to complete this important study.

Sign in / Sign up

Export Citation Format

Share Document