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

By Erik Dahlman

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

to maneuver to higher-speed networks which can cater to consumer call for for cellular broadband multimedia functions, the 3GPP has built the newest LTE-Advanced (LTE free up 10) typical, to be able to be fastened in December 2010. This ebook makes a speciality of LTE and LTE-Advanced, and offers engineers with actual perception and knowing into the why and the way of the traditional and its similar applied sciences. This booklet is written via engineers from Ericsson--the world's top telecommunications supplier--who was once seriously keen on the improvement of the standard.

  • Follow-up to the very winning 3G Evolution, now targeting LTE and LTE complicated general and its accompanying technologies
  • Complete and transparent clarification of LTE complicated through the people who performed a number one function in its improvement, on the way to allow engineers to speedy seize the newest 3GPP unencumber 10 typical and enforce it of their products
  • Not a contributed publication as so much others in this subject are: this e-book offers an built-in advent to the applied sciences and the standard
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Extra resources for 4G: LTE/LTE-Advanced for Mobile Broadband

Sample text

1) consists of an integer number of periods of complex exponentials during the demodulator integration interval Tu  1/Δf. However, in case of a time-dispersive channel the orthogonality between the subcarriers will, at least partly, be lost. 8. Thus, the integration interval will not necessarily correspond to an integer number of periods of complex exponentials of that path as the modulation symbols ak may differ between consecutive symbol intervals. As a consequence, in the case of a time-dispersive channel there will not only be inter-symbol interference within a subcarrier, but also interference between subcarriers.

Once the subcarrier spacing has been selected, the number of subcarriers can be decided based on the assumed overall transmission bandwidth, taking into account acceptable out-of-band emission, etc. 3 Principles for OFDM modulation. 8. As an example, for 3GPP LTE the basic subcarrier spacing equals 15 kHz. On the other hand, the number of subcarriers depends on the transmission bandwidth, with of the order of 600 subcarriers in the case of operation in a 10 MHz spectrum allocation and correspondingly fewer/more subcarriers in the case of smaller/larger overall transmission bandwidths.


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