By Erik Dahlman
This booklet makes a speciality of LTE with complete updates together with LTE-Advanced (Release-11) to supply a whole photo of the LTE system. exact reasons are given for the most recent LTE criteria for radio interface structure, the actual layer, entry methods, broadcast, relaying, spectrum and RF features, and approach performance.
Key applied sciences offered comprise multi-carrier transmission, complex single-carrier transmission, complicated receivers, OFDM, MIMO and adaptive antenna options, radio source administration and protocols, and diversified radio community architectures. Their position and use within the context of cellular broadband entry as a rule is defined, giving either a high-level evaluate and extra designated step by step explanations.
This booklet is a must have source for engineers and different execs within the telecommunications undefined, operating with mobile or instant broadband applied sciences, giving an realizing of the way to make use of the hot expertise with the intention to remain prior to the competition.
New to this edition:
- In-depth description of CoMP and greater multi-antenna transmission together with new reference-signal buildings and suggestions mechanisms
- Detailed description of the help for heterogeneous deployments supplied by way of the most recent 3GPP release
- Detailed description of recent stronger downlink control-channel constitution (EPDDCH)
- New RF configurations together with operation in non-contiguous spectrum, multi-bands base stations and new frequency bands
- Overview of 5G as a suite of well-integrated radio-access applied sciences, together with aid for greater frequency bands and versatile spectrum administration, vast antenna configurations, and ultra-dense deployments
- Covers a whole replace to the newest 3GPP Release-11
- Two new chapters on HetNet, overlaying small cells/heterogeneous deployments, and CoMP, together with Inter-site coordination
- Overview of present prestige of LTE unlock 12 together with additional improvements of local-area, CoMP and multi-antenna transmission, Machine-type-communication, Device-to-device communication
Read Online or Download 4G: LTE/LTE-Advanced for Mobile Broadband PDF
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Extra info for 4G: LTE/LTE-Advanced for Mobile Broadband
However, in the 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.
17a. 17 assumes that consecutive subcarriers are used for transmission to/from the same terminal. 18. The benefit of such distributed user multiplexing or distributed multiple access is a possibility for additional frequency diversity as each transmission is spread over a wider bandwidth. In the case when OFDMA is used as an uplink multiple-access schemedthat is, in the case of frequency multiplexing of OFDM signals from multiple terminalsdit is critical that the transmissions from the different terminals arrive approximately time aligned at the base station.
Readers are referred to, for example,  for a more in-depth discussion on channel estimation for OFDM. 3 in the previous chapter, a radio channel is always subject to some degree of frequency selectivity, implying that the channel quality will vary in the frequency domain. In the case of a single wideband carrier, such as a WCDMA carrier, each modulation symbol is transmitted over the entire signal bandwidth. 13a), each modulation symbol will be transmitted both over frequency bands with relatively good quality (relatively high signal strength) and frequency bands with low quality (low signal strength).
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