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4G: LTE/LTE-Advanced for Mobile Broadband

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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Journal ArticleDOI
TL;DR: In this article, the performance of relay networks in the presence of hybrid automatic repeat request (ARQ) feedback and adaptive power allocation was investigated for independent and spatially-correlated fading channels.
Abstract: This paper investigates the performance of relay networks in the presence of hybrid automatic repeat request (ARQ) feedback and adaptive power allocation. The throughput and the outage probability of different hybrid ARQ protocols are studied for independent and spatially-correlated fading channels. The results are obtained for the cases where there is a sum power constraint on the source and the relay or when each of the source and the relay are power-limited individually. With adaptive power allocation, the results demonstrate the efficiency of relay-ARQ techniques in different conditions.

18 citations

Proceedings ArticleDOI
01 Dec 2016
TL;DR: Indoor and outdoor field experimental results that clarify the 4-by-8 MIMO throughput performance when applying distributed multiple-input multiple-output (MIMO) with a narrow antenna beam tracking in the 15 GHz frequency band in the downlink of a 5G cellular radio access system are presented.
Abstract: This paper presents indoor and outdoor field experimental results that clarify the 4-by-8 MIMO throughput performance when applying distributed multiple-input multiple-output (MIMO) with a narrow antenna beam tracking in the 15 GHz frequency band in the downlink of a 5G cellular radio access system. The experimental results show that throughput exceeding 15 Gbps is achieved with a high average rank of 4 at an indoor office building lobby and outdoor parking area. As for the distributed MIMO gain in terms of throughput in LoS environments, we achieve throughput gain of 39 % and 105 % in the indoor office building lobby and outdoor parking area, respectively. And also throughput gain of 15 % is achieved in N-LoS environment in office building lobby in multi-path rich environment. We also observe a significant increase of throughput and rank when changing the transmission point (TP) spacing from 0.5 to 1.5 m, while only a limited performance improvement when the TP spacing exceeds 1.5 m. Finally, the throughput performance with various TP positions was tested, and the TP locations when facing each other with a TP spacing of 50 m exhibit excellent performance exceeding 10 Gpbs.

18 citations


Cites background from "4G: LTE/LTE-Advanced for Mobile Bro..."

  • ...INTRODUCTION Currently, the amount of traffic in mobile cellular services is dramatically increasing along with the demand for rich mobile network services and contents for smartphones [1]....

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Journal ArticleDOI
26 Jul 2017-Entropy
TL;DR: The objective of the considered AN design is to degrade the error probability performance at the untrusted relay, for different types of channel state information (CSI) at the destination, and reveals that the Gaussian distribution is generally not optimal to generate AN symbols.
Abstract: We apply the concept of artificial and controlled interference in a two-hop relay network with an untrusted relay, aiming at enhancing the wireless communication secrecy between the source and the destination node. In order to shield the square quadrature amplitude-modulated (QAM) signals transmitted from the source node to the relay, the destination node designs and transmits artificial noise (AN) symbols to jam the relay reception. The objective of our considered AN design is to degrade the error probability performance at the untrusted relay, for different types of channel state information (CSI) at the destination. By considering perfect knowledge of the instantaneous CSI of the source-to-relay and relay-to-destination links, we first present an analytical expression for the symbol error rate (SER) performance at the relay. Based on the assumption of an average power constraint at the destination node, we then derive the optimal phase and power distribution of the AN that maximizes the SER at the relay. Furthermore, we obtain the optimal AN design for the case where only statistical CSI is available at the destination node. For both cases, our study reveals that the Gaussian distribution is generally not optimal to generate AN symbols. The presented AN design takes into account practical parameters for the communication links, such as QAM signaling and maximum likelihood decoding.

18 citations


Cites background or methods from "4G: LTE/LTE-Advanced for Mobile Bro..."

  • ..., which are frequently used in the current and upcoming communication standards [36]....

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  • ...In this work, we consider the communication between a pair of source and destination terminals, where a direct link is absent, and therefore, a half-duplex relay terminal is utilized to assist the communication [35,36]....

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  • ...Furthermore, we assume that the source transmits demodulation reference signals (DM-RS) [36] so that the relay can perfectly estimate h to perform ideal coherent demodulation as,...

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  • ...Furthermore, the AN-based scheme studied in this paper is formulated according to the framework of current cellular standards such as LTE/LTE-Advanced of 4G and the next major phase of mobile telecommunications standard 5G [3,36]....

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  • ...Furthermore, we assume that the source transmits demodulation reference signals (DM-RS) [36] so that the relay can perfectly estimate h to perform ideal coherent demodulation as, ỹ = h∗ |h|y = |h|m + h∗g |h| z + h∗ |h|n. (2) Forwarded by the relay, the destination also has access to h and the DM-RS of the source in order to demodulate the signal m....

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Journal ArticleDOI
TL;DR: Modeling of user arrival in live LTE network is performed in this work, which is important since the incoming users are predominantly using data traffic compared to that of traditional voice traffic.

18 citations

Patent
Seunghee Han1, Hong He2, Shafi Bashar2, Jong-Kae Fwu2, Xiaogang Chen2 
05 Aug 2013
TL;DR: In this paper, the authors describe an apparatus, computer-readable media and a user equipment for uplink transmit power control for transmitting CSI and the apparatus comprising UCI circuitry to generate UCI that includes CSI for a plurality of serving cells, CSI for one or more CSI-processes or p-CSI for a single serving cell.
Abstract: Embodiments of the present disclosure describe an apparatus, computer-readable media and a user equipment for uplink transmit power control for transmitting p— CSI and the apparatus comprising UCI circuitry to generate UCI that includes p— CSI for a plurality of serving cells, p— CSI for one or more CSI-processes or p— CSI for a single serving cell and HARQ— ACK information and feedback circuitry coupled with the UCI circuitry, wherein the feedback circuitry is to determine an uplink transmit power to transmit the UCI in a subframe with a PUCCH format that utilizes a quadrature phase shift keying modulation scheme and provides up to 48 bits per subframe, wherein the feedback circuitry is to determine the uplink transmit power based on a CSI offset and wherein the UCI includes more than 11 bits.

18 citations