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3G Evolution : HSPA and LTE for Mobile Broadband

TL;DR: In this paper, the authors present a very up-to-date and practical book, written by engineers working closely in 3GPP, gives insight into the newest technologies and standards adopted by threeGPP with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE.
Abstract: This very up-to-date and practical book, written by engineers working closely in 3GPP, gives insight into the newest technologies and standards adopted by 3GPP, with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE. The key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced radio resource management and protocols, and different radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of HSPA and LTE implementation are given. An overview of other related systems such as TD SCDMA, CDMA2000, and WIMAX is also provided.This is a 'must-have' resource for engineers and other professionals working with cellular or wireless broadband technologies who need to know how to utilize the new technology to stay ahead of the competition.The authors of the book all work at Ericsson Research and are deeply involved in 3G development and standardisation since the early days of 3G research. They are leading experts in the field and are today still actively contributing to the standardisation of both HSPA and LTE within 3GPP. * Gives the first explanation of the radio access technologies and key international standards for moving to the next stage of 3G evolution: fully operational mobile broadband* Describes the new technologies selected by the 3GPP to realise High Speed Packet Access (HSPA) and Long Term Evolution (LTE) for mobile broadband * Gives both higher-level overviews and detailed explanations of HSPA and LTE as specified by 3GPP
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Dissertation
17 Sep 2010
TL;DR: Un distributeur adaptatif capable of faire des choix en temps reel sur the base of temps d'execution predits sur the differents cœurs contenus dans un eNodeB is presented.
Abstract: Le standard 3GPP LTE (Long Term Evolution) est un nouveau standard de telecommunication terrestre dont la couche physique des stations de base, appelees eNodeB, est particulierement couteuse. Les processeurs de traitement du signal (DSP) sont largement employes dans les stations de base pour calculer les algorithmes de la couche physique. Les DSPs de derniere generation sont des systemes complexes et heterogenes. Il n'existe pas actuellement de solution ideale pour distribuer les parties d'une application comme le LTE sur les differents cœurs contenus dans un eNodeB. Dans cette these, nous presentons une methode de travail pour le prototypage rapide et la generation de code automatique. Certains algorithmes de la couche physique du LTE etant trop variables pour une distribution hors-ligne, nous presentons un distributeur adaptatif capable de faire des choix en temps reel sur la base de temps d'execution predits.

8 citations

01 Jan 2009

8 citations

01 Jan 2011
TL;DR: The concept of Iterative Source-Channel Decoding (ISCD) is fundamentally extended and optimized, especially in view of a possible practical implementation and an innovative concept for the robust packet-based transmission of correlated source signals is presented.
Abstract: The source-channel separation theorem postulated by Shannon has influenced the design of communication systems for multimedia content over the last decades: Source encoding and channel encoding are performed as two separate steps. However, the conditions of the separation theorem are almost never fulfilled in practical systems; a joint consideration of source and channel coding can thus be of special interest. Such a joint consideration with iterative decoding based on the Turbo principle has been found to be especially advantageous with regard to the realization of efficient multimedia communication systems. In the first part of this thesis, the concept of Iterative Source-Channel Decoding (ISCD) is fundamentally extended and optimized, especially in view of a possible practical implementation. New design guidelines and optimization criteria lead to a flexible and versatile system design. Special care is taken to optimize the components such that a residual error rate, which shall be as low as possible, results. Besides an extended, iterative receiver architecture leading to an improved exploitation of the correlation between consecutive frames, a simple yet effective stopping criterion is presented. This stopping criterion leads to an ISCD system with incremental redundancy transmission. It is additionally shown how a complexity-reduced ISCD receiver can be designed by employing a novel way of signal quantization. While the first part of this thesis treats the source encoding as given, it is consequently incorporated into the system design in the second part. As a novelty, an efficient method for the compression of parameter sources is introduced. This method shows the advantage of an easy adaptivity to varying transmission conditions. It is additionally shown how the ISCD concept can be applied for decoding multiple descriptions in order to improve the signal reconstruction quality in the presence of bit errors and packet losses. Besides optimized system designs, an innovative concept for the robust packet-based transmission of correlated source signals is presented. All variants and proposals are thoroughly analyzed using theoretical methods, by convergence analysis, or with computer simulations. The contribution of this thesis is the improvement of the error robustness and the spectral efficiency of future digital multimedia communication systems.

8 citations


Cites background from "3G Evolution : HSPA and LTE for Mob..."

  • ..., part of the UMTS HSPA extension [HT06] and of the emerging LTE standard [DPSB08]....

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  • ...Examples are UMTS [HT06], LTE [DPSB08], WiMAX [AGM07], WLAN 802....

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  • ..., the Universal Mobile Telecommunications System (UMTS) [HT06], Long Term Evolution (LTE) [DPSB08], and Worldwide Interoperability for Microwave Access (WiMAX) [AGM07] wireless mobile radio standards....

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Proceedings ArticleDOI
07 Apr 2013
TL;DR: E-PF is an enhanced PF-based utility function, which is expected to support QoS and provide a low-complexity algorithm for multi-channel OFDMA networks, and demonstrates via extensive simulation results, that E-PF outperforms PF in terms of system throughput and mean delay.
Abstract: OFDMA-based networks have been considered to be a promising solution to wireless networks especially for broadband multimedia mobile services In this paper, we propose an enhanced proportional fair (E-PF) scheduling algorithm, which aims at maximizing QoS throughput while still retaining fairness as well as maximizing system throughput in downlink OFDMA systems Proportional fair (PF) has emerged as a prominent candidate in wireless networks because it achieves a good tradeoff between system throughput and fairness Nevertheless, the equivalent airtime allocation scheme via PF leads to low throughput of bad channel users, and also limits the attainable QoS throughput of the entire system E-PF is an enhanced PF-based utility function, which is expected to support QoS and provide a low-complexity algorithm for multi-channel OFDMA networks We demonstrate via extensive simulation results, that E-PF outperforms PF in terms of system throughput and mean delay Also, the results show that E-PF well accommodates nearly twice the amount of high priority data than PF does

8 citations


Cites background from "3G Evolution : HSPA and LTE for Mob..."

  • ...I. INTRODUCTION Orthogonal Frequency Division Multiple Access (OFDMA) based networks, such as Long Term Evolution (LTE) [1] and WIMAX [1, 2], are envisioned as the next generation wireless communications systems for broadband multimedia mobile services....

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  • ...The AMC schemes include quaternary phase shift keying (QPSK), 16-quadrature amplitude modulation (16-QAM), and 64-QAM in LTE downlink system....

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  • ...ENHANCED PROPORTIONAL FAIR SCHEDULING In this paper, we proposed an Enhanced Proportional Fair (E-PF) scheduling, which aims at accommodating maximum real-time traffic while still retaining fairness among mobile stations (MSs) and maximizing system throughput for multichannel multi-rate such as LTE downlink OFDMA system....

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  • ...LTE allocates radio resources based on a basic time-frequency unit called Resource Block (RB)....

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  • ...Enhanced Proportional Fair (E-PF) for LTE downlink....

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01 Jan 2010
TL;DR: A thorough analysis and performance evaluation of the LTE downlink with MIMO antennas is evaluated and the results demonstrate that the design goals and requirements of 3GPP LTE can be met with a great deal of reliability and certainty.
Abstract: Long Term Evolution (LTE) of the Universal Mobile Telecommunication System (UMTS) also known as the Evolved Packet System (EPS) is a transilient move in the field of mobile communications. Such a revolution is necessitated by the unceasing increase in demand for high speed connections on networks, low latency and delay, low error rates and resilience because modern users and network applications have become increasingly dependent on these requirements for efficient functionality and performance. Third Generation Partnership Project Long Term Evolution (3GPP LTE) promises high peak data rates for both uplink and downlink transmission, spectral efficiency, low delay and latency, low bit error rates, to mention but a few. These functional and performance targets of 3GPP LTE are laudable and can be met with a great measure of certainty, but then a vital question emerges: What are the prime drivers or enablers for these technology standard requirements to be met? LTE leverages on a number of technologies namely Multi Input Multiple Output (MIMO) antennas, Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiplexing Access (OFDMA) at the downlink, Single Carrier Frequency Division Multiple Access (SCFDMA) at the uplink, support for Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (16QAM), and 64QAM. This thesis work evaluates the performance of LTE downlink with MIMO techniques. MIMO technology involves the use of multiple antennas at the transmitter, receiver or both. There are different combinations of array configuration and polarization, transmission and detection schemes that can be implemented to achieve different purposes in functional and performance terms. In terms of array configuration and polarization, there exists single polarized array and cross polarized array (which could be compact or detached); transmission schemes include diversity schemes particularly transmit diversity and spatial multiplexing; detection schemes such as Zero Forcing (ZF) and Soft Sphere Decoding (SSD). The performance metrics considered are throughput and BER and these are used to evaluate the performance of LTE in flat-fading and International Telecommunications Union B (ITU-B) Pedestrian channel with zero forcing and soft sphere decoding for Single Input Single Output (SISO), transmit diversity and spatial multiplexing. The granular analysis and evaluation of the performance 3GPP LTE is imperative and this thesis implements this on the downlink side. A thorough analysis and performance evaluation of the LTE downlink with MIMO antennas is thus the focal point and the results demonstrate that the design goals and requirements of 3GPP LTE can be met with a great deal of reliability and certainty. The simulations show that the performance of MIMO is better than SISO in both channel models particularly when SSD is employed. When high order modulation is utilized, performance in the flat-fading channel model is better than ITU pedestrian B channel at low SNR regions. Spatial multiplexing is ideal for achieving very high peak rates, while transmit diversity is a valuable scheme to minimize the rate of bit error occurrence thereby improving signal quality.

8 citations