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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29 Nov 2012
TL;DR: Two new load control algorithms are proposed in this paper and system-level simulation results show that the average cell throughput can be considerably improved and at the same time the coverage can be maintained at a level similar to a system without IC.
Abstract: Multi-stage interference cancellation (IC) can improve the interference conditions for all users of a cell. In order to exploit the IC gain at system level, it is important to design radio resource management algorithms that account for this gain. For this purpose, two new load control algorithms are proposed in this paper, together with some further enhancements. For Algorithm 1, load control and scheduling are still performed based on the air interface Rise over Thermal (RoT), but with an increased RoT target. The RoT target is determined based on the estimated IC gain. A cell-specific and dynamic RoT target is hence used rather than a constant one. With Algorithm 2, load control and scheduling are performed based on an effective RoT without increasing the RoT target. The load control function is placed after an intermediate IC stage depending on the timing constraints and/or the required IC processing gain of the coverage limiting channels. With the proposed algorithms, system-level simulation results show that the average cell throughput can be considerably improved and at the same time the coverage can be maintained at a level similar to a system without IC.
5 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...The HSPA uplink (HSUPA) was introduced in 3GPP Release 6 to improve the performance of the uplink dedicated transport channels, that is, to increase the data rate and to reduce the packet delay [1]....
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...Assuming there are N users in the own cell, the load generated from the own cell becomes [1]...
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01 Jan 2014
TL;DR: Evers et al. as discussed by the authors evaluated and applied long term evolution (LTE), digital video broadcast (DVB), and digital audio broadcast (DAB) signals of opportunity for passive bistatic SAR imaging.
Abstract: Evers, Aaron. M.S.Egr., Department of Electrical Engineering, Wright State University, 2014. Evaluation and Application of LTE, DVB, and DAB Signals of Opportunity for Passive Bistatic SAR Imaging. Due to the many advantages of passive radar and ubiquity of commercial broadcast transmitters, interest in passive bistatic radar (PBR) applications has continued to grow. More specifically, sources studying commercial orthogonal frequency division multiplexing (OFDM) waveforms for passive bistatic synthetic aperture radar (SAR) imaging have become more common. This work evaluates and applies long term evolution (LTE), digital video broadcast (DVB), and digital audio broadcast (DAB) signals of opportunity for passive bistatic SAR imaging. First, implications of the structure and properties of each of the signal of opportunity’s transmitted waveform are characterized by examining the waveform’s selfand crossambiguity functions (AFs). In addition to deriving waveform properties, link budget analysis is completed using pessimistic values intrinsic to LTE, DVB, and DAB transmissions for predicting performance of potential passive bistatic SAR imaging scenarios. Small-scale, passive bistatic SAR imaging experiments are carried out using signals structured similarly to LTE, DVB, and DAB signals, demonstrating the merits of the considered processing schemes for passive bistatic SAR image generation.
5 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...For a more detailed description, the reader is referred to [15,16]....
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...The 3rd generation partnership project (3GPP) is a partnership project composed of different standards-developing bodies, which first began developing LTE in December 2004 [15]....
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...However, if this was not the case, cell search procedures using the synchronization signals, PSS and SSS, could be performed as described in [15] to determine the CID....
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...Coverage areas for an LTE basestation range from 5 to 100 km with 5 km cell sizes being the most common [15]....
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...The increased deployment of commercial broadcast transmitters has increased the complexity of the global spectrum [15]....
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TL;DR: IEC 61850 communication is proposed for realizing coordinated operation between microgrid controller, DSTATCOM and DERs and the developed reactive power management system is tested with the LTE technology and the performance evaluation tests have been performed.
Abstract: Reactive power management in microgrids with high penetration of distributed renewable energy sources (DRESs) is challenging. The intermittent generation of DRES makes the power management cumbersome. Generally, Flexible AC Transmission System (FACTS) devices such as Distribution Static Compensator (DSTATCOM) are employed for reactive power compensation in microgrids. However, for effective results in microgrids, coordinated operation between DSTATCOM and Distributed Energy Resources (DERs) is required. In this paper, IEC 61850 communication is proposed for realizing coordinated operation between microgrid controller (MGCC), DSTATCOM and DERs. In microgrids, there may be large number of DERs dispersed over a large area. Hence, the underlying communication network technology for IEC 61850 communication must be highly scalable with wide range. Recently developed communication technology Long Term Evolution (LTE) is a promising solution since it offers high data rates, reliability, scalability and longer range. In this paper, the developed IEC 61850 based reactive power management system is tested with the LTE technology and the performance evaluation tests have been performed. Firstly, IEC 61850 messages have been mapped on LTE stack to enable their transmission. Then, simulations over a network emulator have been performed to evaluate the performance of IEC 61850 communication message exchanges over LTE network in terms of End to End (ETE) delays.
5 citations
23 Aug 2011
TL;DR: The OFDM technique with overlapping and orthogonal subchannels was proposed to increase spectrum efficiency and improves robustness against narrowband interference or severely frequency-selective channel fades caused by long multipath delay spreads and impulsive noise.
Abstract: Recently, orthogonal frequency division multiplexing (OFDM) techniques have received great interest in wireless communications for their high speed data transmission. OFDM improves robustness against narrowband interference or severely frequency-selective channel fades caused by long multipath delay spreads and impulsive noise. A single fade or interferer can cause the whole link to fail in a single carrier system. However, only a small portion of the subcarriers are damaged in a multicarrier system. In a classical frequency division multiplexing and parallel data systems, the signal frequency band is split into N nonoverlapping frequency subchannels that are each modulated with a corresponding individual symbol to eliminate interchannel interference. Nevertheless, available bandwidth utilization is too low to waste precious resources on conventional frequency division multiplexing systems. The OFDM technique with overlapping and orthogonal subchannels was proposed to increase spectrum efficiency. A high-rate serial signal stream is divided into many low-rate parallel streams; each parallel stream modulates a mutually orthogonal subchannel individually. Therefore, OFDM technologies have recently been chosen as candidates for fourth-generation (4G) mobile communications in a variety of standards, such as 802.16m and LTE/LTE-A.
5 citations
TL;DR: Several objective metrics, such as the ratio of lost packets, the peak signal to noise ratio, the Structural SIMilarity, the application goodput, and packet delays, have been evaluated to show the LTE-A effectiveness in delivering 3D videos in a realistic last generation mobile environment.
Abstract: Due to the ever growing interest of 3-dimensional (3D) technology, together with the the widespread use of new generation smartphones, netbooks, and tablets, the idea to provide 3D multimedia services also to mobile users is attracting the attention of researchers worldwide. The emerging long term evolution-advanced (LTE-A) technology seems to have all the potential to offer such kind of services but no accurate studies have been yet conducted to demonstrate this assumption. To bridge this gap, we investigate herein how the LTE-A network configuration, the traffic load, and 3D video settings may influence to the quality of all services of all active flows. We consider a heterogeneous LTE-A network composed by macro and pico cells and a number of users uniformly distributed into the scenario, that receive at the same time 3D video streams, voice flows and best-effort applications. Moreover, several objective metrics, such as the ratio of lost packets, the peak signal to noise ratio, the Structural SIMilarity, the application goodput, and packet delays, have been evaluated to show the LTE-A effectiveness in delivering 3D videos in a realistic last generation mobile environment.
5 citations