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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01 Jan 2013
TL;DR: This thesis investigates novel adaptive techniques where the transmission resources and parameters are adapted according to the channel state information in order to provide reliable and efficient data packet delivering over frequency selective channels.
Abstract: Future wireless systems are expected to provide even more high data rates and reliable communications to support the ever increasing demand of heterogeneous applications and services. Furthermore, these strict requirements must be satisfied in the harsh environment of the wireless propagation channel, and must cope with the scarcity of the available radio spectrum. For such systems, the multicarrier modulation technique known as orthogonal frequency division multiplexing (OFDM) emerged as the key technology at the physical layer thanks to its high spectral efficiency, rather simple transceiver structure and robustness to multipath fading. Within this context, this thesis investigates novel adaptive techniques where the transmission resources and parameters are adapted according to the channel state information in order to provide reliable and efficient data packet delivering over frequency selective channels. These techniques, known in the literature as link resource adaptation (LRA) and resource allocation (RA), are proposed in combination with a number of advanced features such as the efficient channel coding technique represented by the bit interleaved coded modulation (BICM) and hybrid automatic repeat request (HARQ) mechanisms. Differently from the majority of LRA and RA problems considered in the literature, this thesis focuses on the goodput figure of merit, defined as the number of information bits delivered in error-free packets per unit of time. The latter represents in fact an adequate metric to give a reliable picture of the actual link performance, when features such as practical modulation and coding, packet oriented transmissions and HARQ mechanisms are employed. In detail, the main contributions of the thesis are: the derivation of a LRA strategy that assigns modulation, coding rate and power to a cognitive BIC-OFDM system; a novel performance prediction method, which exploits the effective signal-to-noise ratio (SNR) methodology, for BIC-OFDM systems featuring HARQ protocols with packet combing; a LRA algorithm that selects the best bit loading distribution and coding rate for BIC-OFDM systems; a fair RA scheme that assigns power, modulation order, coding rate and subcarriers to users on the downlink of a BIC orthogonal frequency division multiple access (OFDMA) system to maximize the performance of the user having the lowest goodput value.
3 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...Link resource adaptation (LRA) [19], [20] is therefore a fundamental aspect for future wireless systems since it deals with how to efficiently set the transmission parameters of a radio link to handle variations of the radio link quality....
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...In this case, the term OFDMA is also often used and Channel-Dependent Scheduling stems as a powerful paradigm to perform dynamic allocation of the available radio resources [20], [23], such as subcarriers, power, coding rate and bits, to all the users....
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...This mechanism is called HARQ with soft combining [20] and will be analyzed in Chapter 5....
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...Instead of assigning a fixed amount of resources to each data flow, channel-aware scheduling strategies [20] have been proposed to adaptively transmit data and dynamically assign wireless resources based on CSI [88]....
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09 Nov 2010
TL;DR: In a network of transmission pairs, representing e.g. a pico/femto-cellular network, this work proposes a self-organizing rate splitting method, where the network nodes coordinate based on the limited information available at the nodes.
Abstract: We consider distributed Inter-Cell Interference Coordination based on rate splitting and interference cancellation. Link adaptation is performed based on Channel Quality Information both on the desired link and on links towards interference victims. A transmitted message is split into a private and a public part. The private part is decodable only by the intended receiver, whereas the public part is in addition decodable by some interference victims. The receivers run a best-effort interference cancellation algorithm, canceling interfering public signals. A system of two transmission pairs can be analyzed completely. In a network of transmission pairs, representing e.g. a pico/femto-cellular network, we propose a self-organizing rate splitting method, where the network nodes coordinate based on the limited information available at the nodes. Coordination complexity grows linearly with the size of coordination group.
3 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...LTE solves ICIC in a distributed manner, with direct communication between base stations [3]....
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18 Jul 2012
TL;DR: This paper overviews and assesses HSPA evolution strategies and HSPA+ features are presented in line with their deployment costs in the short and long term.
Abstract: Present years showed increasingly active competition on the mobile market. Considering rapid technology development and its business implications, operators need to steer the market trend and take faster response than competitors in order to survive and to keep growing. Rich spectrum of alternative 3G network upgrade directions opens a debate on the applicable and convenient evolution strategy providing resources for growing data-traffic and at the same time keeping the investments under control. This paper overviews and assesses HSPA evolution strategies. In this context, HSPA+ features are presented in line with their deployment costs in the short and long term.
3 citations
Additional excerpts
...Keywords – HSPA, DC-HSDPA, MIMO, CAPEX,...
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TL;DR: In this article, the authors presented the characterization of LTE-CommSense instrument to detect presence or absence of objects in outdoor environment, and analyzed its capability of detecting and distinguishing when multiple objects are present.
Abstract: LTE-CommSense is a novel instrumentation scheme which analyzes channel affected reference signals of LTE downlink signal to obtain knowledge about the environmental change. This work presents the characterization of LTE-CommSense instrument to detect presence or absence of objects in outdoor environment. Additionally, we analyze its capability of detecting and distinguishing when multiple objects are present. For performance evaluation and characterization of this instrument, we derive object detection accuracy, FAR, FRR and resolution which we believe are the most important figures of merit in this case. As the operation of LTE-CommSense is to detect events instead of objects, we redefine the concept of resolution for LTE-CommSense. Two different proposals to represent the redefined resolution viz. Neyman Pearson principle based and Cramer Rao principle based resolution are presented here. All the performance metrics are derived using practical data captured using an SDR platform modeled as a LTE-CommSense receiver. We observe that, LTE-CommSense provides better performance in detecting presence or absence of objects at near range.
3 citations
15 Dec 2011
TL;DR: An overview of multi-antenna techniques, which can exploit the spatial degree of freedom, thereby addressing the challenges of flexibility and reconfigurability of front-ends in communication systems are provided.
Abstract: Reconfigurability, efficiency, and power consumption are key areas for improvement in future communication systems. The frequency spectrum is becoming more crowded and the spatial density of users is increasing. It becomes interesting for a communication system to use temporary freedom in the spatial and spectral domain. In this paper, we provide an overview of multi-antenna techniques, which can exploit the spatial degree of freedom, thereby addressing the challenges of flexibility and reconfigurability of front-ends in communication systems. Starting with a general qualification of multi-antenna techniques, their benefits and their goals, we will focus on beamsteering and beamforming techniques and their possible application for communication systems.
3 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...A detailed signal processing description is out of the scope of this paper, but can be found in [4], [5]....
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...This technique can be used in receiver systems that receive signals from a number of independent sources, for countering the effects of fading [4]....
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...key tool to meet the specifications [4]....
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...These can be subdivided into two groups [4]:...
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...An important characteristic of any multi-antenna configuration is the inter-antenna distance, that is, the distance between antenna elements on the transmitter or receiver [4]....
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