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: Simulation results showed the Tanimoto coefficients more resistant against noise for EEG, while MFCC has a high-efficiency noise resistance for the speech signal.
4 citations
26 Oct 2011
TL;DR: An initial look at the Evolved Universal Terrestrial Radio Access Network (EUTRAN), the air interface for TD-LTE, is taken and how DSA could potentially be implemented is focused on, and a roadmap for future research and development is laid out that ensures that the waveform can be ruggedized in an interoperable way.
Abstract: The Time-Division mode for Long Term Evolution (TD-LTE) is viewed by many as the first waveform that will be enabled by Dynamic Spectrum Access (DSA) and see widespread adoption in both the commercial and public safety arena. The Third Generation Partnership Project (3GPP) is developing standards for DSA-enabling TD-LTE. In this paper we take an initial look at the Evolved Universal Terrestrial Radio Access Network (EUTRAN), the air interface for TD-LTE, and seek to identify how a DSA-enabled version of TD-LTE could be efficiently jammed by an adversary. Robust communications in the face of hostile jammers will be a necessary component as DSA-TD-LTE is being to be deployed by public safety users. We focus on physical-layer features such as the OFDM and MIMO, and how DSA could potentially be implemented. Then we lay out a roadmap for future research and development that ensures that the waveform can be ruggedized in an interoperable way.
4 citations
Patent•
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TL;DR: In this article, a method in a transmitter for transmitting at least a first data burst and a second data burst to a receiver (105) in a system (100) applying applies closed loop codebook-based precoding MIMO.
Abstract: The embodiments herein relate to a method in a transmitter (101) for transmitting at least a first data burst and a second data burst to a receiver (105) in a system (100) applying applies closed loop codebook-based precoding MIMO. The transmitter (101) comprises at least a first Tx antenna (107a) and a second Tx antenna (107b). The transmitter (101) transmits, to the receiver (105), at least the first data burst through the first Tx antenna (107a) and the second data burst through the second Tx antenna (107b). The first data burst comprises a first training sequence and the second data burst comprises a second training sequence when the first data burst and the second data burst are non-precoded. The first data burst comprises a third training sequence and the second data burst comprises a fourth training sequence when the first data burst and the second data burst are precoded.
4 citations
01 Jan 2013
4 citations
16 Jun 2013
TL;DR: This paper considers codebook-based downlink beamforming proposing a linear adaptive channel predistortion method to close the performance gap between codebook and non-codebook based beamforming defined in wireless standards, e.g., LTE-A.
Abstract: This paper considers codebook-based downlink beamforming proposing a linear adaptive channel predistortion method to close the performance gap between codebook and non-codebook based beamforming defined in wireless standards, e.g., LTE-A. The proposed channel predistortion method does not involve any additional signalling overhead. In our novel beamforming concept, we optimize the codebook-based precoding vector assignment, the power allocation, and the channel predistortion matrix jointly to minimize the transmitted power of the base station (BS) while guaranteeing the quality-of-service (QoS) of the mobile stations (MSs) and satisfying the smoothness conditions on the channel predistortion matrix. The joint channel predistortion and codebook-based beamforming (PCB) problem represents a non-convex mixed integer program (MIP). An alternating optimization algorithm (ATOA) and an alternating feasibility search algorithm (AFSA) are developed to approximately solve the PCB problem. Simulation results show that the proposed codebook-based beamforming achieves significant reductions of the transmitted power of the BS and remarkable increases of the percentage of feasible cases of all Monte Carlo runs, as compared to the standard codebook-based beamforming. Numerical results also show that the proposed design performs very close to the non-codebook based beamforming in the given settings and that the proposed ATOA and AFSA are close-to-optimal.
4 citations
Cites background from "4G: LTE/LTE-Advanced for Mobile Bro..."
...Emails: {cheng, pesavento}@nt.tudarmstadt.de....
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...Unlike in non-codebook based beamforming where the normalized beamformers take values on a continuous manifold, in codebook-based beamforming the normalized beamformer of each MS is restricted to a predefined precoding vector contained in a finite codebook [4]–[6]....
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...…performance of the proposed design is very close to that of the non-codebook based beamforming in terms of both the total transmitted power of the BS and the percentage of feasible cases and that the ATOA and the AFSA yield near-optimal solutions of the PCB problem under the considered settings....
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