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

By Erik Dahlman

In line with the bestseller "3G Evolution - HSPA and LTE for cellular broadband" and reflecting the continued good fortune of LTE in the course of the international, this publication specializes in LTE with complete updates together with LTE-Advanced to supply an entire photo of the LTE process. review and targeted causes are given for the most recent LTE criteria for radio interface structure, the actual layer, entry techniques, broadcast, relaying, spectrum and RF features, and procedure functionality. Key applied sciences awarded comprise multi-carrier transmission, complicated single-carrier transmission, complicated receivers, OFDM, MIMO and adaptive antenna recommendations, complex radio source administration and protocols, and assorted radio community architectures. Their function and use within the context of cellular broadband entry generally is defined. either a high-level review and extra unique step by step causes of the LTE/LTE-Advanced implementation are given. an summary of alternative comparable structures reminiscent of GSM/EDGE, HSPA, CDMA2000, and WIMAX is additionally 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 knowing of ways to make use of the hot expertise so one can remain sooner than the contest. The authors of the e-book all paintings at Ericsson examine and feature been deeply focused on 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 3GPP.  Includes complete info of the most recent additions to the LTE Radio entry criteria and applied sciences as much as and together with 3GPP liberate 10Clear reasons of the position of the underlying applied sciences for LTE, together with OFDM and MIMO complete insurance of LTE-Advanced, together with LTE service aggregation, prolonged multi-antenna transmission, relaying performance and heterogeneous deploymentsLTE radio interface structure, actual layer, entry tactics, MBMS, RF features and procedure functionality coated intimately

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

Sample text

Assuming a constant transmit power, the received signal power can always be increased by reducing the distance between the transmitter and the receiver, thereby reducing the attenuation of the signal as it propagates from the transmitter to the receiver. 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.

Different types of multi-antenna techniques, including spatial multiplexing, will be discussed in more detail in Chapter 5. Multi-antenna techniques for the specific case of LTE are discussed in Chapters 10 and 11. An alternative to increasing the received signal power is to reduce the noise power, or more exactly the noise power density, at the receiver. This can, at least to some extent, be achieved by more advanced receiver RF design, allowing for a reduced receiver noise figure. 2 Higher Data Rates in Interference-Limited Scenarios The discussion above assumed communication over a radio link only impaired by noise.

Assuming a constant transmit power, the received signal power can always be increased by reducing the distance between the transmitter and the receiver, thereby reducing the attenuation of the signal as it propagates from the transmitter to the receiver. 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.

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