By Erik Dahlman
This e-book specializes in LTE with complete updates together with LTE-Advanced (Release-11) to supply an entire photo of the LTE system. precise factors are given for the most recent LTE criteria for radio interface structure, the actual layer, entry tactics, broadcast, relaying, spectrum and RF features, and process performance.
Key applied sciences offered contain multi-carrier transmission, complex single-carrier transmission, complex receivers, OFDM, MIMO and adaptive antenna suggestions, radio source administration and protocols, and various radio community architectures. Their function and use within the context of cellular broadband entry in most cases is defined, giving either a high-level evaluation and extra targeted step by step explanations.
This ebook is a must have source for engineers and different pros within the telecommunications undefined, operating with mobile or instant broadband applied sciences, giving an realizing of the way to make use of the recent expertise so one can remain prior to the competition.
New to this edition:
- In-depth description of CoMP and more desirable multi-antenna transmission together with new reference-signal constructions and suggestions mechanisms
- Detailed description of the help for heterogeneous deployments supplied by means of the newest 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 larger frequency bands and versatile spectrum administration, sizeable antenna configurations, and ultra-dense deployments
- Covers a whole replace to the newest 3GPP Release-11
- Two new chapters on HetNet, masking small cells/heterogeneous deployments, and CoMP, together with Inter-site coordination
- Overview of present prestige of LTE unlock 12 together with extra improvements of local-area, CoMP and multi-antenna transmission, Machine-type-communication, Device-to-device communication
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Extra resources for 4G: LTE/LTE-Advanced for Mobile Broadband
9 Cyclic-prefix insertion In practice, cyclic-prefix insertion is carried out on the time-discrete output of the transmitter IFFT. Cyclic-prefix insertion then implies that the last NCP samples of the IFFT output block of length N are copied and inserted at the beginning of the block, increasing the block length from N to N þ NCP. At the receiver side, the corresponding samples are discarded before OFDM demodulation by means of, for example, DFT/FFT processing. Cyclic-prefix insertion is beneficial in the sense that it makes an OFDM signal insensitive to time dispersion as long as the span of the time dispersion does not exceed the length of the cyclic prefix.
At the same time, if sufficient received signal power can be made available, basically any data rate can, at least in theory, be provided within a given limited bandwidth. • In the case of low-bandwidth utilizationdthat is, as long as the radio-link data rate is substantially lower than the available bandwidthdany further increase of the data rate requires approximately the same relative increase in the received signal power. This can be referred to as power-limited operation (in contrast to bandwidth-limited operation; see below) as, in this case, an increase in the available bandwidth does not substantially impact what received signal power is required for a certain data rate.
1 High data rates in noise-limited scenarios From the previous discussion, some basic conclusions can be drawn regarding the provisioning of higher data rates in a mobile-communication system when noise is the main source of radio-link impairment (a noise-limited scenario): • The data rates that can be provided in such scenarios are always limited by the available received signal power or, in the general case, the received signal-power-to-noise-power ratio. Furthermore, any increase of the achievable data rate within a given bandwidth will require at least the same relative increase of the received signal power.
4G: LTE/LTE-Advanced for Mobile Broadband by Erik Dahlman