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

By Erik Dahlman

This booklet makes a speciality of LTE with complete updates together with LTE-Advanced (Release-11) to supply a whole photograph of the LTE system.  certain factors are given for the most recent LTE criteria for radio interface structure, the actual layer, entry approaches, broadcast, relaying, spectrum and RF features, and method performance.

Key applied sciences awarded comprise multi-carrier transmission, complex single-carrier transmission, complex receivers, OFDM, MIMO and adaptive antenna suggestions, radio source administration and protocols, and diverse radio community architectures. Their function and use within the context of cellular broadband entry generally is defined, giving either a high-level evaluation and extra designated step by step explanations.  

This e-book 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 recent know-how that allows you to remain sooner than the competition.

New to this edition: 

    • In-depth description of CoMP and better multi-antenna transmission together with new reference-signal buildings and suggestions mechanisms
    • Detailed description of the aid for heterogeneous deployments supplied by way of the most recent 3GPP release
    • Detailed description of recent more desirable 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 collection of well-integrated radio-access applied sciences, together with help for greater frequency bands and versatile spectrum administration, significant antenna configurations, and ultra-dense deployments
  • Covers a whole replace to the newest 3GPP Release-11
  • Two new chapters on HetNet, protecting small cells/heterogeneous deployments, and CoMP, together with Inter-site coordination
  • Overview of present prestige of LTE unencumber 12 together with additional improvements of local-area, CoMP and multi-antenna transmission, Machine-type-communication, Device-to-device communication

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Additional resources for 4G: LTE/LTE-Advanced for Mobile Broadband, Second Edition

Sample text

1) in theory has an infinite bandwidth and thus the sampling theorem can never be fulfilled completely. 3 From now on the index m on the modulation symbols, indicating the OFDM symbol number, will be ignored unless especially needed. 34 CHAPTER 3 OFDM Transmission a0 a1 a0 , a1, . . 6 OFDM modulation by means of IFFT processing r0 r1 aˆ 0 aˆ1 aˆ 0 , aˆ1 ,... 7 OFDM demodulation by means of FFT processing It is important to understand that IDFT/IFFT-based implementation of an OFDM modulator, and even more so the exact IDFT/IFFT size, are just transmitter-implementation choices and not something that would be mandated by any radio-access specification.

34 CHAPTER 3 OFDM Transmission a0 a1 a0 , a1, . . 6 OFDM modulation by means of IFFT processing r0 r1 aˆ 0 aˆ1 aˆ 0 , aˆ1 ,... 7 OFDM demodulation by means of FFT processing It is important to understand that IDFT/IFFT-based implementation of an OFDM modulator, and even more so the exact IDFT/IFFT size, are just transmitter-implementation choices and not something that would be mandated by any radio-access specification. 3. Also, nothing prevents the use of a larger IFFT size, for example a size-2048 IFFT, even in the case of a smaller number of OFDM subcarriers.

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. More specifically, the transmissions from the different terminals should arrive at the base station with a timing misalignment less than the length of the cyclic prefix to preserve orthogonality between subcarriers received from different terminals and thus avoid inter-user interference.

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