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
Citations
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01 Jun 2010
TL;DR: The clipping noise in an asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) wireless communication system is derived semi-analytically and the attenuation factor and the clipping noise variance are determined and verified through simulation.
Abstract: In this paper, the clipping noise in an asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) wireless communication system is derived semi-analytically. Clipping noise in ACO-OFDM is introduced either because of insufficient forward biasing of the emitter, or a low power sensitivity of the detector. Following the Bussgang theorem, the non-linear distortion caused by the clipping of the time domain signal attenuates the frequency domain subcarriers at the receiver and adds zero-mean Gaussian noise. The attenuation factor and the clipping noise variance are determined and verified through simulation. Finally, bit-error ratio (BER) and goodput simulations compare the performance of ACO-OFDM with a direct-current-biased optical OFDM (DCO-OFDM) system for different clipping levels and multilevel quadrature amplitude modulation ($M$-QAM) schemes.
33 citations
Cites methods from "3G Evolution : HSPA and LTE for Mob..."
...IFFT/FFT size of 2048 is chosen in accord with the LTE standard [14]....
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...In general, in the long term evolution (LTE) OFDM framework, pilot tones are used for channel estimation and equalization [14]....
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09 May 2010
TL;DR: The paper shows that, thanks to self-organization, sensible performance improvements can be achieved in terms of spectral efficiency and power consumption reductions.
Abstract: This paper presents a framework based on self-organization to jointly self-optimize the spectrum assignment and the transmission power in the context of downlink OFDMA femtocell deployments. It is a distributed framework where each femtocell acts as an autonomous entity. Femtocells perform spectrum and transmission power assignment based on users’ reported measurements, which are employed to sense intercell interference, including that from other femtocells or from macrocells in two-layer deployments. Results have been obtained for a realistic indoor femtocell deployment with and without macrocell interference. The paper shows that, thanks to self-organization, sensible performance improvements can be achieved in terms of spectral efficiency and power consumption reductions.
33 citations
TL;DR: The intention to adopt basic Internet services largely depends on the importance of using similar services in the mobile domain as on the fixed Internet, and several context-of-use predictors are partially or even fully mediated by fixed-mobile reinforcement.
33 citations
Cites methods from "3G Evolution : HSPA and LTE for Mob..."
...The trend of fixed-mobile convergence will further be fueled by the integration of wireless and wired access networks using technologies like IP Multimedia Subsystem and Systems Architecture Evolution in LTE (Dahlman et al., 2007)....
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TL;DR: In this article, the authors conducted an analysis based on (declared) essential patents in WCDMA and LTE standards, and derived interesting findings and meaningful implications from the analysis.
32 citations
25 Aug 2008
TL;DR: A so-called maximum greedy algorithm is proposed, which outperforms the existing greedy algorithm and provides an optimum solution for SA by using the so- called Hungarian algorithm.
Abstract: This paper explores and compares different dynamic subcarrier allocation (SA) schemes for single carrier (SC) FDMA systems. A so-called maximum greedy algorithm is proposed, which outperforms the existing greedy algorithm. We also provide an optimum solution for SA by using the so-called Hungarian algorithm. Furthermore, all the algorithms presented in this paper are very general and can be extended for OFDMA systems easily. Simulation results show that the investigated dynamic SA schemes significantly outperform the case with fixed SA. With the increase of the number of users, dynamic SA provides improved bit error rate (BER) performance, benefiting from multiuser diversity.
32 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...Dynamic subcarrier allocation (SA) [2] to different users plays an important role in wireless multi-carrier systems, where the channel environment is time-varying....
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...INTRODUCTION Single-carrier frequency division multiple access (SCFDMA) [10], an alternative to orthogonal FDMA (OFDMA) [2], is a promising transmission technology for future wireless communication systems such as 3GPP-LTE [2]....
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