Book•
3G Evolution : HSPA and LTE for Mobile Broadband
31 Jul 2007-
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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TL;DR: Based on the research model, both the Korean government and governments of other countries can be expected to further advance smart tourism in the future by implementing policy and institutional supports that aim to enable 4G LTE network-based M2V to realize a technological access system.
Abstract: The aim of this study is to facilitate market access by Internet of things (IoT) mobile virtual network operators (MVNOs) (`M2V' hereinafter) for the purpose of providing the IoT services required to implement more advanced smart tourism in the tourism sector, which is heavily influenced not only by the Internet but also by information and communications technology (ICT) in the era of fourth generation (4G) long term evolution (LTE) networks. The study produced the following results. It established a 4G LTE network-based technological access system, which is commercially offered all over the world, and suggested business models featuring diverse interworking between network and system through M2V access to 4G LTE, as well as the resulting wholesale price calculation model according to bandwidth. Based on the research model, both the Korean government and governments of other countries can be expected to further advance smart tourism in the future by implementing policy and institutional supports that aim to enable 4G LTE network-based M2V to realize a technological access system, and by inducing M2V to make inroads into the tourism industry based on diversified business models.
28 citations
TL;DR: Low-resolution aware channel estimators are developed based on the Bussgang decomposition for 1-bit oversampled systems and analytical bounds on the mean square error and symbol error rate performance are investigated.
Abstract: Large-scale multiple-antenna systems with large bandwidth are fundamental for future wireless communications, where the base station employs a large antenna array. In this scenario, one problem faced is the large energy consumption as the number of receive antennas scales up. Recently, low-resolution analog-to-digital converters (ADCs) have attracted much attention. Specifically, 1-bit ADCs are suitable for such systems due to their low cost and low energy consumption. This paper considers uplink large-scale multiple-antenna systems with 1-bit ADCs on each receive antenna. We investigate the benefits of using oversampling for channel estimation in terms of the mean square error and symbol error rate performance. In particular, low-resolution aware channel estimators are developed based on the Bussgang decomposition for 1-bit oversampled systems and analytical bounds on the mean square error are also investigated. Numerical results are provided to illustrate the performance of the proposed channel estimation algorithms and the derived theoretical bounds.
28 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...INTRODUCTION Multi-user (MU) multiple-input multiple-output (MIMO) is currently being used in many wireless communication systems like long-term evolution (LTE), which allows for a small number of antennas at the base station [1]....
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TL;DR: This paper proposes an initial synchronization architecture for the sector search process in third-generation partnership project (3GPP) long-term evolution (LTE) communications that takes intercell interference, intercarrier interference and multipath fading into consideration with assistance from inherent diversity.
Abstract: This paper proposes an initial synchronization architecture for the sector search process in third-generation partnership project (3GPP) long-term evolution (LTE) communications. The proposed system, consisting of three techniques, takes intercell interference, intercarrier interference and multipath fading into consideration with assistance from inherent diversity. The outage and detection probabilities are derived by taking multisector diversity into account in the coarse timing alignment. The long-lag differential correlator can achieve approximately 4.7-dB signal-to-noise ratio (SNR) gain in primary synchronization sequence (PSS) acquisition probability. Joint estimation of the residual timing error and the fractional frequency offset is achieved by evaluating the short-lag autocorrelation at an orthogonal frequency division multiplexing (OFDM) symbol duration. Mean-square errors obtained via simulations are compared with the modified Cramer-Rao lower bounds derived here. The proposed technique can achieve approximately 6.9-dB SNR gain when it is compared with that assisted from the synchronization signalling. Joint detection of the integral frequency offset (IFO) and the sector identification (SID) is achieved by exploiting a frequency-domain (FD) matched filter (MF) to deal with frequency selectivity. Differential detection on a segmental FD MF is considered in frequency-selective environments. Computer simulations are conducted to verify that the proposed technique can achieve high IFO and SID detection probabilities.
28 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...Each CIDG consists of three sector IDs (SIDs), which are indexed as v ∈ {0, 1, 2}, each for a sector [20]....
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TL;DR: A comprehensive view is provided upon various aspects of RRM, its challenges, existing solutions and directions for research to find and develop smarter and more adaptive schemes for future.
Abstract: Radio resource and its management is one of the key areas of research where technologies, infrastructure and challenges are rapidly changing as 5G system architecture demands a paradigm shift. The previous generation communication technologies require customizations and upgrades as 5G will remain inclusive for significantly long duration. Radio resource management (RRM) schemes that are evolved during LTE/LTE-A network environment period will remain relevant for 5G, however, these schemes must become more intelligent and adaptive for future as features and requirements of network and users will be diverse and highly demanding. In this paper, a comprehensive view is provided upon various aspects of RRM, its challenges and existing schemes. The existing RRM schemes are presented with their respective architecture which has significant impact on the approaches. The problem of RRM is multi-dimensional and different dimensions are presented with their respective solutions such as interference or energy management. In this paper study of legacy and state of the art RRM schemes is presented with their features and inefficiencies in the modern telecommunication era of heterogeneous, ultra-dense, very low latency and highly reliable mobile network. In addition to this various comparison among approaches and schemes are presented for analyzing the solutions. The need of RRM solution is critical and this paper aim is to outline the challenges, existing solutions and directions for research to find and develop smarter and more adaptive schemes for future.
28 citations
TL;DR: In this article, the power and resource allocation over block-fading relay-assisted broadcast channels in order to maximize the long-term average achievable rates region of the users is studied.
Abstract: We provide the solution for optimizing the power and resource allocation over block-fading relay-assisted broadcast channels in order to maximize the long term average achievable rates region of the users. The problem formulation assumes regenerative (repetition coding) decode-and-forward (DF) relaying strategy, long-term average total transmitted power constraint, orthogonal multiplexing of the users messages within the channel blocks, possibility to use a direct transmission (DT) mode from the base station to the user terminal directly or a relaying (DF) transmission mode, and partial channel state information. We show that our optimization problem can be transformed into an equivalent "no-relaying" broadcast channel optimization problem with each actual user substituted by two virtual users having different channel qualities and multiplexing weights. The proposed power and resource allocation strategies are expressed in closed-form that can be applied practically in centralized relay-assisted wireless networks. Furthermore, we show by numerical examples that our scheme enlarges the achievable rates region significantly.
28 citations