Báo cáo hóa học: "Research Article Dynamic Subcarrier Allocation for Real-Time Traffic over Multiuser OFDM Systems" ppt
Báo cáo hóa học: "Research Article Dynamic Subcarrier Allocation for Real-Time Traffic over Multiuser OFDM Systems" ppt
... and NetworkingVolume 2009, Article ID 298451, 9 pagesdoi:10.1155/2009/298451Research Article Dynamic Subcarrier Allocation for Real-Time Traffic over Multiuser OFDM SystemsFanglei Sun,1Mingli ... proposed algorithm significantly improves thesystem performance for real-time users in multiuser OFDM systems.References[1] E. Lawrey, Multiuser OFDM, ” in Proceedings of the Inter-national Symposium ... orthogonal frequency division multiplexing (OFDM) systems is introduced. Our proposed cross-layer algorithm, called Dynamic Subcarrier Allocation algorithm for Real-time Traffic (DSA-RT), consists of...
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Báo cáo hóa học: " Research Article Dynamic Quality Control for Transform Domain Wyner-Ziv Video Coding" ppt
... constant quality for transform domain WZ video coding.In [5], Morb´ee et al. propose an encoder rate allocation algorithm for a Stanford-like pixel domain WZ video codec. For this, the correlation ... that both real-time and offline applicationsmay be targeted. The benchmarking for the proposed WZvideo codec performance will be the RD performance andthe quality variations obtained for the same ... central role inthe final RD performance. For example, it is well knownthat the overall RD performance may be improved at thecost of a more nonuniform quality allocation between thekey frames and...
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Báo cáo hóa học: " Research Article Dynamic Bandwidth Allocation Based on Online Traffic Prediction for Real-Time MPEG-4 Video Streams" ppt
... limitation of predictive dynamic bandwidth allocation approach, RED-VBR scheme [2],awell-knownheuristic dynamic bandwidth allocation, is used as a baseline for the performance evaluation. By ... favor-able for better overall performance.6. CONCLUSIONSThe key contributions of our work are (1) noting that a re-alistic service policy in trace-driven simulation for dynamic resource allocation ... Signal ProcessingVolume 2007, Article ID 87136, 10 pagesdoi:10.1155/2007/87136Research Article D ynamic Bandwidth Allocation Based on Online Traffic Prediction for Real-Time MPEG-4 Video StreamsYaoLiangandMeiHanDepartment...
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Báo cáo hóa học: " Research Article Pulse Interval Modulation for Ultra-High Speed IR-UWB Communications Systems" pdf
... vthon PER performance in the presence of the MUI for 8-PIMwhen the code weight is w= 10 and Eb/N0= 15 dB. It canbe seen that for the optimal threshold vth= 6, the PERperformance improves ... slightdifference for large Eb/N0.0 5 10 15 2010−410−310−210−1100SNR (dB)PER2-PPM4-PPM8-PPM2-PIM4-PIM8-PIMFigure 7: PER performance comparison of PPM and PIM for thesame average ... worse performance than 2-PAM and2-PPM, respectively. With the increase of the modulationlevel to L= 4, PIM has a 0.8 dB better performance than4-PAM and 3 dB worse than 4-PPM, while for L=...
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báo cáo hóa học:" Research Article A Formal Model for Performance and Energy Evaluation of Embedded Systems" pot
... CorporationEURASIP Journal on Embedded SystemsVolume 2011, Article ID 316510, 12 pagesdoi:10.1155/2011/316510Research Ar ticleA Formal Model for Performance and Energy Evaluation ofEmbedded SystemsBruno ... Coloured Petri Nets for evaluating embedded systems performance and energy consumption. In particular,this work presents a method for specifying and evaluating the workload and the platform components, ... the performance and energy consumption estimation. Atool, named PECES, was implemented for automatizing themethod. Additionally, a measuring platform, named AMAL-GHMA, was constructed for characterizing...
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Báo cáo hóa học: " Research Article Channel Resource Allocation for VoIP Applications in Collaborative IEEE 802.11/802.16 Networks" ppt
... corresponding to eight OFDM symbols, ten bandwidthrequest slots w ith each slot corresponding to two OFDM symbols, two OFDM symbols for TTG and RTG, two OFDM symbols for the Preamble at the ... g rant service (UGS) for CBR trafficsuchas voice.(ii) Real-Time polling service (rtPS) for real-time VBRtrafficsuchasMPEGvideos.(iii) Nonrealtime polling service (nrtPS) for nonrealtimetraffic ... throughput performance for the scheme withoutusing priority.the AP becomes the bottleneck for the communications inIEEE 802.11. For the scheme without cooperation, we fix theresource allocation...
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Báo cáo hóa học: " Research Article Performance Analysis of Two-Hop OSTBC Transmission over Rayleigh Fading Channels" ppt
... pagesdoi:10.1155/2010/649541Research Article Performance Analysis of Two-Hop OSTBC Transmission over Rayleigh Fading ChannelsGuangping Li,1Steven D. Blostein,2and Jiay in Qin31Faculty of Information Engineering, ... MGF (27) for theideal relay gain into (25)and(26), respectively, we obtainexact average SER expressions for MPSK and MQAM.Remark 6. The SER expressions for MPSK and MQAMcan straightforwardly ... However,the method in [8] is only suitable for systems with thesame numbers of antennas at the source and destination.Moreover, an exact expression for outage probability was notgiven, and...
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Báo cáo hóa học: " Research Article An Existence Result for Nonlinear Fractional Differential Equations on Banach Spaces" ppt
... y≤pfty for a.e. t ∈ J and each y ∈ E,gt, y≤pgty, for a.e. t ∈ J and each y ∈ E,ht, y≤phty, for a.e. t ∈ J and each y ∈ E.3.6H3 For almost each ... y0,y0, and so forth. the samerequirements of boundary conditions. Caputo’s fractional derivative satisfies these demands. For more details on the geometric and physical interpretation for fractional ... existence of solutions for boundary value problemswith fractional order differential equations and nonlinear integral conditions of the formcDryt ft, yt, for each t ∈ J 0,T,y0−...
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Báo cáo hóa học: " Research Article Rate-Distortion Optimization for Stereoscopic Video Streaming with Unequal Error Protection" ppt
... decoder.5.1. Performance Curve Model. We propose a heuristicanalytical model of the performance curve of Raptor codeswhich is going to be used for the derivation of optimal paritypacket allocation ... Results for pe= 0.03 for “Soccer” video.pe= 0.05303234363840PSNR (dB)11.522.533.5×106RC(bits/s)Protect-LEEPProposedNo-lossNo-protectionFigure 23: Results for pe= 0.05 for ... ratios for Pe∈{0.03,0.05, 0.1, 0.2} and RC∈{500, 750, 1000, 1500, 2000, 2500(kbps)} for Rena”videoandRC∈{1000, 1500, 2000, 2500,3000, 3500 (kbps)} for “Soccer” video. Thus, we perform...
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Báo cáo hóa học: " Research Article Downlink Resource Allocation for Autonomous Infrastructure-based Multihop Cellular Networks" pdf
... effective modeling for the joint base-station/relay assignment,rate allocation, and routing scheme is proposed and formulated under a single problem for the downlink. This problem is thenformulated ... its total transmit power for forwarding the trafficofotherrelaysorBSs.ReferringtoFigure 2, we assume thatBS 1 reserves k1PBS for serving the packets that shouldbe forwarded via relay 1. Relay ... resource allocation independent of the others. We assume that each relay coversp (0≤ p ≤ 100) percentage of its corresponding sector area.The resource allocation problem is solved for a snapshot...
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