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 Jan 2011
TL;DR: The proposed scheme can be used to determine the interleaving/scrambling sequence that was used at the transmitter and the performance of the scheme is investigated for some standard convolutional codes.
Abstract: We present a fast mechanism for determining which channel code that was used on a communication link. In the proposed scheme, the receiver does not need to receive the entire data to determine the actual code. Moreover, the proposed scheme can also be used to determine the interleaving/scrambling sequence that was used at the transmitter. We investigate the performance of the scheme for some standard convolutional codes.
3 citations
TL;DR: This work proposes an efficient frequency-domain packet scheduling (FDPS) for situations where some of the queues have a small amount of data available for transmission in downlink OFDMA-based systems and demonstrates that better performance is achieved in terms of system throughput as well as fairness perspective.
Abstract: We propose an efficient frequency-domain packet scheduling (FDPS) for situations where some of the queues have a small amount of data available for transmission in downlink OFDMA-based systems. Under such small-queue condition, we first show that current FDPS proposals result in sub-optimal outcome, suffering from their isolated resource-assignment strategies. With our simple algorithmic solution, we demonstrate that better performance is achieved in terms of system throughput as well as fairness perspective, which is evaluated using 3GPP LTE system model simulations.
3 citations
Cites methods from "3G Evolution : HSPA and LTE for Mob..."
...The scheduler also determines the data rate to be used for each user in each subframe and can perform rate adaptation by using adaptive modulation and coding (AMC) in different subframes [2]....
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TL;DR: Investigation of opportunistic multi-user scheduling for next generation cognitive two-way relay networks, where the communication between two secondary source terminals is affected by both fast fading and shadowing shows that the proposed scheme can be a preferable user scheduling approach for nextgeneration wireless systems.
3 citations
Posted Content•
TL;DR: In this article, the authors comprehensively discuss the recent advances in NOMA from a grant-free connectivity perspective and discuss the related practical challenges and future directions, in contrast to existing surveys.
Abstract: Massive machine-type communications (mMTC) is one of the main three focus areas in the 5th generation (5G) of mobile standards to enable connectivity of a massive number of internet of things (IoT) devices with little or no human intervention. In conventional human-type communications (HTC), due to the limited number of available radio resources and orthogonal/non-overlapping nature of existing resource allocation techniques, users need to compete for connectivity through a random access (RA) process, which may turn into a performance bottleneck in mMTC. In this context, non-orthogonal multiple access (NOMA) has emerged as a potential technology that allows overlapping of multiple users over a radio resource, thereby creating an opportunity to enable more autonomous and grant-free communication, where devices can transmit data whenever they need. The existing literature on NOMA schemes majorly considers centralized scheduling based HTC, where users are already connected, and various system parameters like spreading sequences, interleaving patterns, power control, etc., are predefined. Contrary to HTC, mMTC traffic is different with mostly uplink communication, small data size per device, diverse quality of service, autonomous nature, and massive number of devices. Hence, the signaling overhead and latency of centralized scheduling becomes a potential performance bottleneck. To tackle this, grant-free access is needed, where mMTC devices can autonomously transmit their data over randomly chosen radio resources. This article, in contrast to existing surveys, comprehensively discusses the recent advances in NOMA from a grant-free connectivity perspective. Moreover, related practical challenges and future directions are discussed.
3 citations
01 Oct 2016
TL;DR: In this article, the impact of the power amplifier on the signal's spectral performances was investigated by using a theoretical model of PA, and then by experimental measurements to compare them with an OFDM signal.
Abstract: Filter Bank MultiCarrier (FBMC) is now a recognized alternative to Orthogonal Frequency Division Multiplexing (OFDM) for 5G communications and cognitive radio thanks to its improved spectral occupancy. However, the RF front-end is not linear and distorts the signal. In this article, we study the impact of the Power Amplifier (PA) on the signal's spectral performances, first by using a theoretical model of PA, and then by experimental measurements to compare them with an OFDM signal. The FBMC ability to bear notches in the spectrum is confirmed, in spite of the PA, and improvement with respect to OFDM measured.
3 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...Index Terms – Cognitive Radio, FBMC, Nonlinearities, Power Amplifier, OFDM, Spectral Agility, Spectral Containment I. INTRODUCTION Multicarrier systems are well established in many different communication standards such as DVB-T [1], Wireless LAN [2] or LTE [3]....
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...Multicarrier systems are well established in many different communication standards such as DVB-T [1], Wireless LAN [2] or LTE [3]....
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