By Stefania Sesia, Issam Toufik, Matthew Baker
"Where this ebook is outstanding is that the reader won't simply learn the way LTE works yet why it works."—Adrian Scrase, ETSI Vice-President, overseas Partnership ProjectsLTE - The UMTS long-term Evolution: From conception to perform offers the reader with a complete system-level knowing of LTE, equipped on reasons of the theories which underlie it. The e-book is the made of a collaborative attempt of key specialists representing quite a lot of businesses actively engaging within the improvement of LTE, in addition to academia. this offers the ebook a extensive, balanced and trustworthy viewpoint in this vital know-how. Lucid but thorough, the e-book devotes specific attempt to explaining the theoretical innovations in an obtainable means, whereas preserving clinical rigour. It highlights useful implications and attracts comparisons with the well known WCDMA/HSPA criteria. The authors not just pay unique consciousness to the actual layer, giving perception into the basic options of OFDMA, SC-FDMA and MIMO, but additionally hide the better protocol layers and process structure to permit the reader to achieve an total knowing of the system.Key Features:Draws at the breadth of expertise of a variety of key specialists from either and academia, giving the publication a balanced and wide viewpoint on LTEProvides a close description and research of the total LTE approach, specifically the ground-breaking new actual layerOffers an excellent therapy of the underlying advances in primary communications and data idea on which LTE is basedAddresses functional matters and implementation demanding situations regarding the deployment of LTE as a mobile systemIncludes an accompanying web site containing an entire checklist of acronyms relating to LTE, with a short description of every (http://www.wiley.com/go/sesia_theumts)This e-book is a useful reference for all learn and improvement engineers eager about LTE implementation, in addition to graduate and PhD scholars in instant communications. community operators, carrier companies and R&D managers also will locate this booklet insightful.
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Additional resources for LTE, The UMTS Long Term Evolution: From Theory to Practice
It is defined as the average time between the first transmission of a data packet and the reception of a physical layer Acknowledgement (ACK). g. 0–30%). This definition therefore considers the capability of the system design, without being distorted by the scheduling delays that would appear in the case of a loaded system. The round-trip latency is obtained simply by multiplying the one-way user plane latency by a factor of two. The LTE system is also required to be able to operate with an IP-layer one-way data-packet latency across the radio access network as low as 5 ms in optimal conditions.
SCFDMA, which is explained in detail in Chapter 15, provides a multiple-access technology which has much in common with OFDMA – in particular the flexibility in the frequency domain, and the incorporation of a guard interval at the start of each transmitted symbol to facilitate low-complexity frequency-domain equalization at the receiver. At the same time, SC-FDMA has a significantly lower PAPR. It therefore resolves to some extent the dilemma of how the uplink can benefit from the advantages of multicarrier technology while avoiding excessive cost for the mobile terminal transmitter and retaining a reasonable degree of commonality between uplink and downlink technologies.
The meaning is clearly indicated in the chapter when used. 1 Historical Context The Long Term Evolution of UMTS is just one of the latest steps in an advancing series of mobile telecommunications systems. Arguably, at least for land-based systems, the series began in 1947 with the development of the concept of cells by the famous Bell Labs of the USA. The use of cells enabled the capacity of a mobile communications network to be increased substantially, by dividing the coverage area up into small cells each with its own base station operating on a different frequency.