OFDMA based resource allocation for wireless communication systems
OFDMA based resource allocation for wireless communication systems
... Fig.1.2 with interleaved subcarrier allocation for the two users 1.4 Motivations in OFDMA- based resource allocation The main allocation issue in OFDMA- based resource allocation is to jointly optimize ... algorithms for OFDMA- based resource allocation in systems such as Single Input Single Output (SISO) - OFDMA, Multiple Input Multiple Output (MIMO) - OFDMA, OFDMA relaying and OFDMA- based Cognitive ... c 2010 BIN DA All Rights Reserved OFDMA- BASED RESOURCE ALLOCATION FOR WIRELESS COMMUNICATION SYSTEMS BIN DA (B.Eng, HHU) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT...
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Báo cáo hóa học: "Research Article Auction-Based Resource Allocation for Cooperative Video Transmission Protocols over Wireless Networks" ppt
... propose cooperative protocols for video transmission to better utilize system resources for performance improvement Moreover, because of the broadcast nature of the phase in cooperative transmission, ... video transmission with side information, we have obtained up to dB gain over the amplify-and-forward or decode-and-forward protocols For the multiuser case, we concentrate on the resource allocation ... (3D-SPIHT) video coding [16], the proposed cooperative video transmission protocol has a significant PSNR gain over the traditional direct video transmission Especially by employing the cooperative video...
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Báo cáo hóa học: "Research Article Stochastic Resource Allocation for Energy-Constrained Systems" doc
... search for λ In other words, after transforming the original optimization problem into the Lagrangian form, we can find an optimal set of configurations for a particular workload in the larger stochastic ... the stochastic allocation problem can also be used to solve the related known-workload problem For a single workload, simply setting napps = and Pr(1) = for the workload maps it into the stochastic ... optimization problem In other words, if we solve the reformulated problem for some λ ≥ and get back a configuration for which i Bi (xi ) is C, for that particular C and λ the solutions of the constrained...
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Radio resource allocation in wireless OFDM systems
... exploiting multiuser diversity gain In order to achieve such an increase in throughput, radio resources need to be managed in an efficient way by adapting to the instantaneous conditions of radio links ... variable for user l in BS n using modulation q on subcarrier k n is omitted in single-cell or distributed systems; k is omitted in single carrier systems; q is omitted in systems using fixed modulation ... deployed Chapter Introduction in radio networks These techniques can also be used in OFDM systems to support multiple mobile terminals With many subcarriers available in OFDM systems, an intuitive way...
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Broadband design on dual and circularly polarized antennas for wireless communication systems
... impedance bandwidth The broadband design of dual and circularly polarized antennas demands precise wideband control of individual orthogonal radiated polarizations Dual linear polarization is attained ... operating bandwidth This thesis presents the broadband design of dual and circularly polarized antennas, and the bandwidth definitions are first established 1.2 Bandwidth Definitions The bandwidth ... ABSTRACT The broadband design of dual and circularly polarized antennas demands precise wideband control of individual orthogonal radiated polarizations The quality of polarization is related...
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Pattern classification based multiuser detectors for CDMA communication systems
... behind DS -CDMA, followed by an overview of the existing conventional multiuser detectors The problem of multiuser detection is reformulated as one of pattern recognition, and two multiuser detectors ... Multiple-Access (CDMA) : An Overview 1.4.1 Motivation for CDMA 1.4.2 Basic Synchronous CDMA Model 1.4.3 Basic Asynchronous CDMA Model 1.5 Limitations of Conventional CDMA System ... presented The existing multiuser detectors can be divided into two categories (i) low-complexity, poor-performance linear detectors and (ii) high-complexity, good-performance nonlinear detectors In particular,...
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Báo cáo hóa học: " Resource allocation for maximizing outage throughput in OFDMA systems with finite-rate feedback" docx
... with quantized CSI can be formulated under feedback capacity constraints We introduce the outage throughput as the performance measure for the downlink throughput Here, we define the outage throughput ... for downlink OFDMA with finite coherence time, in Proceedings of the IEEE ISIT ‘07, 2751–2755 (2007) I Rubin, Information rates and data-compression schemes for poisson processes IEEE Trans Inform ... loading using order mapping in OFDM systems with limited feedback IEEE Signal Process Lett 15, 545–548 (2008) 18 C Chen, L Bai, B Wu, J Choi, Downlink throughput maximization for OFDMA systems with...
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Iterative receiver design for broadband wireless communication systems via expectation maximization (EM) based algorithms
... ITERATIVE RECEIVER DESIGN FOR BROADBAND WIRELESS COMMUNICATION SYSTEMS VIA EXPECTATION MAXIMIZATION (EM) BASED ALGORITHMS THE-HANH PHAM (B Eng., Hanoi ... recommendations for future works Chapter Overview of Expectation Maximization (EM), Expectation Conditional Maximization (ECM) and Space-Alternating Generalized EM (SAGE) Algorithms 2.1 Expectation Maximization ... Overview of Expectation Maximization (EM), Expectation Conditional Maximization (ECM) and Space-Alternating Generalized EM (SAGE) Algorithms 2.1 Expectation Maximization Algorithm...
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Báo cáo toán học: " Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels" potx
... Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels Christoph Hausl∗1 , Onurcan ˙scan1 and Francesco Rossetto2 I¸ Institute DLR, for Communications ... optimization of the resource allocation for multi-way relay systems with asymmetric channels Moreover, we information packet ui , the decoder at Ti outputs the ˆ hard estimates uj about uj for all j between ... 1.1 Multi-Way Relaying with Network Coding Consider a multi-way relay system where N terminals want to exchange their independent information packets with the help of a half-duplex relay over...
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báo cáo hóa học:" Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels" potx
... Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels Christoph Hausl∗1 , Onurcan ˙scan1 and Francesco Rossetto2 I¸ Institute DLR, for Communications ... optimization of the resource allocation for multi-way relay systems with asymmetric channels Moreover, we information packet ui , the decoder at Ti outputs the ˆ hard estimates uj about uj for all j between ... 1.1 Multi-Way Relaying with Network Coding Consider a multi-way relay system where N terminals want to exchange their independent information packets with the help of a half-duplex relay over...
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báo cáo hóa học:" Research Article Resource Allocation for the Multiband Relay Channel: A Building Block for Hybrid Wireless Networks" ppt
... where Ps and Pr are the total available power at the source and relay node αi and ζi are the nonnegative power allocation parameters for each orthogonal band at the source and relay node, and m ... bands available from the source and the relay are mutually orthogonal In particular, the situation where, among total k channels, there are m channels available for the source node and k − m for ... resource allocation strategy In this paper, we investigate the optimal resource allocation strategies that maximize the capacity bounds for a simple hybrid wireless relay network The channel model...
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Báo cáo hóa học: " Research Article Downlink Resource Allocation for Autonomous Infrastructure-based Multihop Cellular Networks" pdf
... A novel modeling for the joint BS/relay assignment, optimum rate allocation, and routing scheme was proposed and formulated under a single problem for the downlink multihop cellular networks ... ←− xK J ←− (i.e., KJ ←− K ) end Algorithm 1: MMKP algorithm for resource allocation in multihop cellular with more valuable ones Therefore, in ADD phase of the algorithm, each item k of every user ... an architecture for a network utilizing the out-of-band transmission for the forwarding traffic along with TDS for the access traffic for the joint optimization of the degree of the multihop, routing...
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Báo cáo hóa học: " Research Article Optimal and Fair Resource Allocation for Multiuser Wireless Multimedia Transmissions" ppt
... suitable for multimedia services To address this disadvantage, we propose an optimal and fair policy for multimedia resource allocation, which introduces a judicious mixture of competition and cooperation, ... paper, we have presented an optimal and fair coopetition strategy for multiuser multimedia RRA Following contributions and conclusions have been made and drawn (1) We formulate the co-opetition ... essential of competition and cooperation behaviors of users in RRA We apply our strategy to wireless resource allocation for multiuser video transmissions and evaluate its performance by comparing...
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Báo cáo hóa học: " Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels" pptx
... Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels Christoph Hausl∗1 , Onurcan ˙scan1 and Francesco Rossetto2 I¸ Institute DLR, for Communications ... optimization of the resource allocation for multi-way relay systems with asymmetric channels Moreover, we information packet ui , the decoder at Ti outputs the ˆ hard estimates uj about uj for all j between ... 1.1 Multi-Way Relaying with Network Coding Consider a multi-way relay system where N terminals want to exchange their independent information packets with the help of a half-duplex relay over...
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