Báo cáo hóa học: "Research Article Dynamic Subcarrier Allocation for Real-Time Traffic over Multiuser OFDM Systems" ppt

... and Networking Volume 2009, Article ID 298451, 9 pages doi:10.1155/2009/298451 Research Article Dynamic Subcarrier Allocation for Real-Time Traffic over Multiuser OFDM Systems Fanglei Sun, 1 Mingli ... proposed algorithm significantly improves the system performance for real-time users in multiuser OFDM systems. References [1] E. Lawrey, Multiuser OFDM, ” in Proc...

Ngày tải lên: 21/06/2014, 20:20

... 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 applications may be targeted. The benchmarking for the proposed WZ video codec performance will be the RD performance and the quality variations obta...

Ngày tải lên: 22/06/2014, 01:20

... limitation of predictive dynamic bandwidth allocation approach, RED-VBR scheme [2],awell-known heuristic dynamic bandwidth allocation, is used as a baseline for the performance evaluation. By ... favor- able for better overall performance. 6. CONCLUSIONS The key contributions of our work are (1) noting that a re- alistic service policy in trace-driven simulation for dynamic res...

Ngày tải lên: 22/06/2014, 23:20

... v th on PER performance in the presence of the MUI for 8-PIM when the code weight is w = 10 and E b /N 0 = 15 dB. It can be seen that for the optimal threshold v th = 6, the PER performance improves ... slight difference for large E b /N 0 . 0 5 10 15 20 10 −4 10 −3 10 −2 10 −1 10 0 SNR (dB) PER 2-PPM 4-PPM 8-PPM 2-PIM 4-PIM 8-PIM Figure 7: PER performance comparison of PPM and PIM for...

Ngày tải lên: 21/06/2014, 08:20

... Corporation EURASIP Journal on Embedded Systems Volume 2011, Article ID 316510, 12 pages doi:10.1155/2011/316510 Research Ar ticle A Formal Model for Performance and Energy Evaluation of Embedded Systems Bruno ... Coloured Petri Nets for evaluating embedded systems performance and energy consumption. In particular, this work presents a method for specifying and evaluating the workload...

Ngày tải lên: 21/06/2014, 11:20

... corresponding to eight OFDM symbols, ten bandwidth request 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 trafficsuch as voice. (ii) Real-Time polling service (rtPS) for real-time VBR trafficsuchasMPEGvideos. (iii) Nonrealtime polling service (nrtPS) for nonr...

Ngày tải lên: 21/06/2014, 11:20

... pages doi:10.1155/2010/649541 Research Article Performance Analysis of Two-Hop OSTBC Transmission over Rayleigh Fading Channels Guangping Li, 1 Steven D. Blostein, 2 and Jiay in Qin 3 1 Faculty of Information Engineering, ... MGF (27) for the ideal relay gain into (25)and(26), respectively, we obtain exact average SER expressions for MPSK and MQAM. Remark 6. The SER expressions for...

Ngày tải lên: 21/06/2014, 11:20

... y  ≤p f  t  y for a.e. t ∈ J and each y ∈ E, g  t, y  ≤p g  t  y, for a.e. t ∈ J and each y ∈ E, h  t, y  ≤p h  t  y, for a.e. t ∈ J and each y ∈ E. 3.6 H3 For almost each ... y0,y  0, and so forth. the same requirements of boundary conditions. Caputo’s fractional derivative satisfies these demands. For more details on the geometric and physical interpr...

Ngày tải lên: 21/06/2014, 20:20

... decoder. 5.1. Performance Curve Model. We propose a heuristic analytical model of the performance curve of Raptor codes which is going to be used for the derivation of optimal parity packet allocation ... Results for p e = 0.03 for “Soccer” video. p e = 0.05 30 32 34 36 38 40 PSNR (dB) 11.522.533.5 ×10 6 R C (bits/s) Protect-L EEP Proposed No-loss No-protection Figure 23: Results for...

Ngày tải lên: 21/06/2014, 22:20

... 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 then formulated ... its total transmit power for forwarding the trafficof otherrelaysorBSs.ReferringtoFigure 2, we assume that BS 1 reserves k 1 P BS for serving the packets that should be forwarded via re...

Ngày tải lên: 21/06/2014, 22:20