Book•
4G: LTE/LTE-Advanced for Mobile Broadband
21 Mar 2011-
TL;DR: In this article, the authors focus on LTE with full updates including LTE-Advanced to provide a complete picture of the LTE system, including the physical layer, access procedures, broadcast, relaying, spectrum and RF characteristics, and system performance.
Abstract: Based on the bestseller "3G Evolution - HSPA and LTE for mobile broadband" and reflecting the ongoing success of LTE throughout the world, this book focuses on LTE with full updates including LTE-Advanced to provide a complete picture of the LTE system. Overview and detailed explanations are given for the latest LTE standards for radio interface architecture, the physical layer, access procedures, broadcast, relaying, spectrum and RF characteristics, and system performance. 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 the LTE/LTE-Advanced implementation are given. An overview of other related systems such as GSM/EDGE, HSPA, CDMA2000, and WIMAX is also provided. This book is a 'must-have' resource for engineers and other professionals in the telecommunications industry, working with cellular or wireless broadband technologies, giving an understanding of how to utilize the new technology in order to stay ahead of the competition. The authors of the book all work at Ericsson Research and have been deeply involved in 3G and 4G 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 LTE within 3GPP. Includes full details of the latest additions to the LTE Radio Access standards and technologies up to and including 3GPP Release 10Clear explanations of the role of the underlying technologies for LTE, including OFDM and MIMO Full coverage of LTE-Advanced, including LTE carrier aggregation, extended multi-antenna transmission, relaying functionality and heterogeneous deploymentsLTE radio interface architecture, physical layer, access procedures, MBMS, RF characteristics and system performance covered in detail
Citations
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TL;DR: It is shown that the matched-filtering at the BD in the proposed approach can improve the performance of backscatter communication for power-limited devices that are connected to a network for the Internet of Things.
Abstract: In this article, we study backscatter communication (BC) for power-limited devices that are connected to a network for the Internet of Things (IoT), where joint estimation and detection is carried out at a receiver to detect signals from a backscatter device (BD) with ambient orthogonal frequency-division multiplexing (OFDM) carrier. In conventional BC, in order to avoid the difficulty of the carrier estimation, the energy detector is usually considered at a receiver at the cost of poor performance. To improve the performance, in this article, we consider a novel approach that allows the carrier estimation at the receiver via joint estimation and detection. In particular, in the proposed approach, the matched-filtering at the BD (for the transmitter filter) is employed to impose a certain property that allows efficient and reliable carrier estimation via joint estimation and detection. Through the performance analysis and simulation results, we show that the matched-filtering at the BD in the proposed approach can improve the performance.
12 citations
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TL;DR: The measured results showed that the proposed models could obtain a better modeling and predistortion performance when applied to ET PAs, with respect to the Memory Polynomial Model, here considered as a reference to represent the state-of-the-art of PA modeling and digitalpredistortion.
12 citations
12 Dec 2011
TL;DR: In this article, the authors investigated the benefit of using optional application layer coding as specified by 3GPP to reduce the packet error rate to the very low levels that are desired for video streaming and compared the power consumption of a high tower TV transmitter with that of a low power LTE/eMBMS network.
Abstract: The first LTE networks have started commercial operation in 2009. Since then, LTE deployment is progressing fast. In the first networks the focus is on mobile broadband (MBB). The high capacity of LTE networks enables high quality rich media services delivery to advanced terminals like smartphones, tablet computers and laptops. In the beginning of 2010, support for enhanced Multimedia Broadcast / Multicast Service (eMBMS) has been added to the 3GPP LTE specifications building on provisions for single frequency network broadcasting that have been made in LTE already in its first release. This paper provides an introduction to LTE including the MBB and eMBMS functionality and shows performance figures for both services. For the broadcasting case we investigate the benefit of using optional application layer coding as specified by 3GPP to reduce the packet error rate to the very low levels that are desired for video streaming. We also compare the power consumption of a high tower TV transmitter with that of a low power LTE/eMBMS network providing the same coverage and data rate.
12 citations
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18 May 2014TL;DR: A new flexible time division duplexing based radio interface for future 5G small cell communications to achieve high energy efficiency, high spectral efficiency and low latency at the same time is introduced.
Abstract: In this paper we introduce a new flexible time division duplexing based radio interface for future 5G small cell communications. We describe the benefits of the new design to achieve high energy efficiency, high spectral efficiency and low latency at the same time. We also compare our reference design against LTE-A assuming rank 8 DL SU-MIMO transmission and show that we our design can achieve more than 29% lower total overhead and up to 90% lower round trip time.
12 citations
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TL;DR: The results reveal that cooperative HARQ-IR scheme can benefit from high fading order and low channel time correlation, and optimal rate selection to maximize the long-term average throughput given a maximum allowable outage probability is discussed.
Abstract: This paper analyzes the performance of cooperative hybrid automatic repeat request with incremental redundancy (HARQ-IR) and proposes a new approach of outage probability approximation for performance analysis. A general time-correlated Nakagami fading channel covering fast fading and Rayleigh fading as special cases is considered here. An efficient inverse moment matching method is proposed to approximate the outage probability in a closed form. The effect of approximation degree is theoretically analyzed to ease its selection. Moreover, diversity order of cooperative HARQ-IR is analyzed. It is proved that the diversity order is irrelevant to the time correlation coefficient $\rho$ , as long as $\rho , and full diversity from both spatial and time domains can be achieved by cooperative HARQ-IR under time-correlated fading channels. The accuracy of the analytical results is verified by computer simulations, and the results reveal that cooperative HARQ-IR scheme can benefit from high fading order and low channel time correlation. Optimal rate selection to maximize the long-term average throughput given a maximum allowable outage probability is finally discussed as one application of the analytical results.
12 citations
Cites methods from "4G: LTE/LTE-Advanced for Mobile Bro..."
...It is also essentially different from the analysis of HARQ-CC over time-correlated fading channels in [9]–[11], where a sum of multiple correlated RVs is concerned....
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...Cooperative HARQ-IR Protocol Following the HARQ-IR protocol, every b-bits information message at the source is encoded into a codeword with M × L symbols [2], where M is the maximal allowable number of HARQ transmissions....
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...Basically, there are three types of HARQ: Type-I HARQ, HARQ with chase combining (HARQ-CC) [2], and HARQ with incremental redundancy (HARQ-IR) [3]....
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