Posts in Category: LTE

What is Envelope Tracking? 

Posted by leopedrini Sunday, April 24, 2016 5:22:00 PM Categories: Course LTE RF Components
Perhaps you've heard that some mobile devices consume less or more battery than others. Or you may have heard the following: "When I put my mobile in LTE mode, it drains more battery." Unfortunately, this is true, especially in the case of LTE. This is one reason why the first LTE devices became known as 'bad' - battery drainer. Note: All telecomHall articles are originally written in Portuguese. Following we translate to English and Spanish. As our time is short, maybe you... read more
 

What are Modes, States and Transitions in GSM, UMTS and LTE? 

Posted by leopedrini Monday, April 04, 2016 4:00:00 PM Categories: Course LTE UMTS
Hello friends. Today we will talk about a very important issue for those working with mobile communications: what are the different modes and states that a mobile phone can take, as well as how the transitions occurs between each of them. The concept is simple, but the great amount of detail can end up making the topic an extensive or complex task. This ends up causing many people simply give up trying to understand, or even not to be interested about know such details. However, the lack... read more
 

What is CSFB and SRVCC in LTE? 

Posted by leopedrini Wednesday, May 20, 2015 9:19:00 AM Categories: Course CSFB IMS LTE SRVCC VoLTE
Regardless of the pace of LTE networks deployment around the world (faster in some areas, slower in others), the number of users with 4G devices is intensively growing. Thanks to factors such as lower costs - due to the gain of production scale, and also by encouraging migration to 4G plans - offered by operators who already have an available network, more and more people have access to new services and benefits that this technology offers. However, as much as the current data services... read more
 

What is CP (Cyclic Prefix) in LTE? 

Posted by leopedrini Thursday, November 13, 2014 1:40:00 PM Categories: Course LTE
Continuing the study of small (but important) LTE concepts, let's talk today about CP (Cyclic Prefix). Goal Our goal today is simple and straightforward: to understand what is the Cyclic Prefix (CP) and how it is used in LTE systems. // Note: All telecomHall articles are originally written in Portuguese. Following we translate to English and Spanish. As our time is short, maybe you find some typos (sometimes we just use the automatic translator, with only a final ... read more
 

What is ISI (Inter Symbol Interference) in LTE? 

Posted by leopedrini Friday, February 28, 2014 1:04:00 PM Categories: Course LTE
The development of modulation techniques allowed significant developments in mobile communications through the transmission of symbols carrying a large amount of information. However, there is a common problem in such systems: the interference inter symbols (ISI or Inter Symbol Interference). Let us understand this today. // Note: All telecomHall articles are originally written in Portuguese. Following we translate to English and Spanish. As our time is... read more