Erik Dahlman's 4G: LTE LTE-Advanced for Mobile Broadband PDF

By Erik Dahlman

ISBN-10: 012385489X

ISBN-13: 9780123854896

In line with the bestseller "3G Evolution - HSPA and LTE for cellular broadband" and reflecting the continuing luck of LTE in the course of the international, this e-book makes a speciality of LTE with complete updates together with LTE-Advanced to supply a whole photograph of the LTE process. assessment and certain causes are given for the newest LTE criteria for radio interface structure, the actual layer, entry strategies, broadcast, relaying, spectrum and RF features, and approach functionality. Key applied sciences awarded comprise multi-carrier transmission, complicated single-carrier transmission, complicated receivers, OFDM, MIMO and adaptive antenna options, complicated radio source administration and protocols, and assorted radio community architectures. Their position and use within the context of cellular broadband entry often is defined. either a high-level evaluate and extra specified step by step factors of the LTE/LTE-Advanced implementation are given. an outline of alternative comparable structures equivalent to GSM/EDGE, HSPA, CDMA2000, and WIMAX can be supplied. This ebook is a 'must-have' source for engineers and different execs within the telecommunications undefined, operating with mobile or instant broadband applied sciences, giving an figuring out of ways to make use of the recent know-how so as to remain sooner than the contest. The authors of the ebook all paintings at Ericsson examine and feature been deeply desirous about 3G and 4G improvement and standardisation because the early days of 3G examine. they're major specialists within the box and are this day nonetheless actively contributing to the standardisation of LTE inside of 3GPP.  Includes complete information of the newest additions to the LTE Radio entry criteria and applied sciences as much as and together with 3GPP unencumber 10Clear reasons of the function of the underlying applied sciences for LTE, together with OFDM and MIMO complete insurance of LTE-Advanced, together with LTE provider aggregation, prolonged multi-antenna transmission, relaying performance and heterogeneous deploymentsLTE radio interface structure, actual layer, entry tactics, MBMS, RF features and method functionality coated intimately

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Additional resources for 4G: LTE LTE-Advanced for Mobile Broadband

Example text

Thus, in a noise-limited scenario it is, at least in theory, always possible to increase the achievable data rates, assuming that one is prepared to accept a reduction in the transmitter/receiver distance – that is, a reduced range. In a mobile-communication system this would correspond to a reduced cell size and thus the need for more cell sites to cover the same overall area. In particular, providing data rates of the same order as or larger than the available bandwidth – that is, with a high-bandwidth utilization – would require a significant cell-size reduction.

The basic bandwidth of an OFDM signal equals Nc Δf – that is, the number of subcarriers multiplied by the subcarrier spacing. 16, the spectrum of a basic OFDM signal falls off very slowly outside the basic OFDM bandwidth and especially much slower than for a WCDMA signal. 1), leading to per-subcarrier side lobes that fall off relatively slowly. However, in practice, straightforward filtering or time-domain windowing [18] will be used to suppress a main part of the OFDM out-of-band emissions. 5 MHz.

As an example, if a bandwidth utilization of close to 2 information bits per modulation symbol is required, QPSK modulation would allow for very limited channel coding (channel-coding rate close to 1). On the other hand, the use of 16QAM modulation would allow for a channel-coding rate of the order of one-half. Similarly, if a bandwidth efficiency close to 4 information bits per modulation symbol is required, the use of 64QAM may be more efficient than 16QAM modulation, taking into account the possibility for lower-rate channel coding and corresponding additional coding gain in the case of 64QAM.

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

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