Introduction
Long Term Evolution (LTE) products are quickly being seen on the market nowadays and much more products are expected in the future. With 5G proposed and expected to arrive around 2020, engineers must work and test these new products out quickly. However, the complexity of these devices does not make this task an easy one. There are many performance measures to consider such as SNR, SIR, capacity, and many more as well as different features that may be necessary to arrive at the desired results. For purposes of this project, I will evaluate a journal from Agilent Technologies that describes how to quickly determine if a MIMO channel is capable of supporting spatial multiplexing when given a particular signal-to-noise ratio (SNR). The term “condition number” will also be introduced when dealing with recovery of MIMO transmission.
Many wireless systems used today have improved data capacity using the multi-antenna system. However, not all MIMO wireless systems are suitable for spatial multiplexing. In order to accommodate this benefit, the wireless channel must have the appropriate antenna configuration and have the ability to accurately recover the channel coupling matrix coefficients. As mentioned before, engineers face many complexities when dealing with wireless channels. Among those complexities include channel correlation and interference/noise rates. That is where the condition number calculation comes in handy. The condition number is a deterministic calculation that evaluates the performance of a wireless channel while estimating for SNR demodulation for a LTE MIMO system. The aim would be to get a condition number as close as 0 dB as possible and try to avoid any values greater than 10 dB.
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...or medium correlation
>>H = evcdf(x,0.9,3) %cdf for high correlation
>>plot(x, L, x, M, x, H); %three plots
References
[1] Agilent Application Note, MIMO Channel Modeling and Emulation Test Challenges,
Literature Number 5989-8973N, October 2008.
[2] Agilent Technologies, MIMO Performance and Condition Number in LTE Test,
Literature Number 5990-4759EN, October 5, 2009.
[3] Advanced Engineering Mathematics, Erwin Kreyszig, 6th Edition, pg. 1025-26, 1988.
[4] LTE and the Evolution to 4G Wireless: Design and Measurement Challenges, Agilent
Technologies, 2nd Edition, chapter 6, April 1, 2013.
[5] Cumulative Distribution Plots, MathWorks, R2014a Documentation
[6] Condition Number of a Matrix, MathWorks, R2014a Documentation
[7] Rohde & Schwarz: “Assessing a MIMO Channel”, Application Note 1SP18, 2010
On March 8th 2012, C Spire Wireless released details that it would roll out 4G LTE services by September 2012. The investment made by the company is $60 million and they would cover 2700 miles, a population of 1.2 million and more than 360 cell sites in 20 Mississippi markets, most of whom are first time consumers who have access to this high speed technology [1]. Its LTE service was officially launched in September 2012 [3]. An LTE net...
For this report, our team performed a scan of the general environment concerning T-Mobile. Topics which were reviewed include the economy, demographics, technology, legal and political events, and social attributes. Significant events and trends dealing with the segments are analyzed throughout.
Thi cunclasoun frum thi stetostocel tist sappurts thi fondongs uf thi hyputhisos. Wrotir huwivir duis nut nicisseroly egrii whulihiertidly woth thi risierch ertocli. Wrotir fiils thiy eri sumi lomotetouns tu thi stady, ot duis nut eccuant fur uthir fecturs on thi eduliscints lofi, bisodis thior chusi on masoc thet mey lied tu saocodel thuaghts end fiilongs.
A wireless carrier which at one point was the largest wireless cell phone carrier and throughout the years it has diminished is the Sprint Corporation. Sprint has had many up and down but it had made its mark not to become irrelevant. Sprint Corporation which is also Sprint is a telecommunication company that is all around America. They provide internet carrier and wireless services. It has become the fourth largest wireless network provider. The company headquarters in Kansas. Sprint came from the Brown telephone Company which was founded in 1899. They merge with Nextel which all has been downhill from there. On December 11, 2012 Sprint purchased equity holdings of one of Clear wires equity holders which allowed them to not have two headquarters and completely move to Kansas. This move saved them a lot of money but did not help the morale of the company’s employees.
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Nowadays, the different cell phone plans available are abundant. You don’t really have to search for a plan that will keep you connected to family and friends while not destroying your budget. However, it is still important to understand just exactly what you need and how much it will cost before choosing a cell phone plan. You may think that one plan is the best, but you may be paying more for the same features than you would if you chose a similar carrier. When you do come across a cell phone plan that you are happy with, you’ll want to compare it to other plans before making the switch. You can save both time and money by viewing many different cell phone carriers and features right here at Wirefly. We’ll help you find the plan that is best for you and your wallet.
The level of RF a person receives is related to many factors, not only the placement of the antenna. Factors that can increase the level of RF are the number of “cells”, the distance to the “base station”, or the obstacles between the caller and the station. The number of cell zones depends on the user population. Heavily populated areas have more cells allowing for more telecommunication traffic. Being close to a cell site lowers the power needed to sustain a call, hence reduces the exposure to RF.
Analysis of the Environment of the Mobile Network System Executive Summary 3 Glossary of Abbreviations 4 Introduction 5 Recent History
The uses of Digital Signal Processing in communications has become so large scale that nearly any form of analog communication is considered obsolete. Today, nearly any form of communication used, aside from verbal communication, relates to Digital Signal Processing. Some of the more prominent uses for DSP in communications are; local area networks, cell pho...
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Print. The. Gordon A. Gow, and Richard K. Smith. Mobile and wireless communications: an introduction, McGraw-Hill International, 2006. Print.
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