Radio Operation

Download 4G: LTE/LTE-Advanced for Mobile Broadband by Erik Dahlman PDF

By Erik Dahlman

LTE (Long time period Evolution) is the 3GPP's (3rd new release Partnership undertaking) new usual and accompanying applied sciences that cellular community operators equivalent to ATT, Verizon and TeliaSonera are adopting for his or her networks.

to maneuver to higher-speed networks which could cater to shopper call for for cellular broadband multimedia purposes, the 3GPP has built the newest LTE-Advanced (LTE unlock 10) commonplace, on the way to be mounted in December 2010. This ebook specializes in LTE and LTE-Advanced, and offers engineers with actual perception and figuring out into the why and the way of the traditional and its comparable applied sciences. This booklet is written by way of engineers from Ericsson--the world's major telecommunications supplier--who used to be seriously concerned with the improvement of the standard.

  • Follow-up to the very profitable 3G Evolution, now targeting LTE and LTE complicated common and its accompanying technologies
  • Complete and transparent rationalization of LTE complex through the people who performed a number one function in its improvement, so that it will let engineers to fast grab the most recent 3GPP free up 10 regular and enforce it of their products
  • Not a contributed e-book as such a lot others in this subject are: this ebook provides an built-in advent to the applied sciences and the standard
  • Show description

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Additional info for 4G: LTE/LTE-Advanced for Mobile Broadband

Sample text

5 would typically consist of only a few subcarriers, each with a relatively wide bandwidth. As an example, the HSPA multi-carrier evolution to a 20 MHz overall transmission bandwidth consists of four (sub)carriers, each with a bandwidth of the order of 5 MHz. In comparison, OFDM transmission may imply that several hundred subcarriers are transmitted over the same radio link to the same receiver. 1a. 1b. 2). 3. It consists of a bank of Nc complex modulators, where each modulator corresponds to one OFDM subcarrier.

It is important to understand that IDFT/IFFT-based implementation of an OFDM modulator, and even more so the exact IDFT/IFFT size, are just transmitter-implementation choices and not something that would be mandated by any radio-access specification. 3. Also, nothing prevents the use of a larger IFFT size, for example a size-2048 IFFT size, even in the case of a smaller number of OFDM subcarriers. • 3 From now on the index m on the modulation symbols, indicating the OFDM symbol number, will be ignored unless especially needed.

11], Shannon provided the basic theoretical tools needed to determine the maximum rate, also known as the channel capacity, by which information can be transferred over a given communication channel. 1) where BW is the bandwidth available for the communication, S denotes the received signal power, and N denotes the power of the white noise impairing the received signal. 1) it should be clear that the two fundamental factors limiting the achievable data rate are the available received signal power, or more generally the available signal-power-tonoise-power ratio S/N, and the available bandwidth.

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