Báo cáo hóa học: " Research Article Opportunistic Scheduling for OFDM Systems with Fairness Constraints" docx

... multiuser OFDM systems. We derive optimal opportunistic scheduling policies under three QoS /fairness constraints for multiuser OFDM systems temporal fairness, utilitarian fairness, and minimum-performance ... Communications and Networking Volume 2008, Article ID 215939, 12 pages doi:10.1155/2008/215939 Research Article Opportunistic Scheduling for OFDM Systems...

Ngày tải lên: 22/06/2014, 06:20

... multiuser OFDM systems. We derive optimal opportunistic scheduling policies under three QoS /fairness constraints for multiuser OFDM systems temporal fairness, utilitarian fairness, and minimum-performance ... Networking Volume 2008, Article ID 215939, 12 pages doi:10.1155/2008/215939 Research Article Opportunistic Scheduling for OFDM Systems with Fairness...

Ngày tải lên: 22/06/2014, 19:20

... ergodic spectral efficiency, none of the systems with AS outperforms the FC system with N receive antennas (and thus N RF chains). However, as for the RFC system with only n R antennas (and thus n R RF ... Communications and Networking Volume 2009, Article ID 739828, 11 pages doi:10.1155/2009/739828 Research Article Antenna Selection for MIMO Systems with Closely Spaced An...

Ngày tải lên: 21/06/2014, 22:20

... meets the destination. For fairness, neither CHARON nor any of the other protocols were highly tuned for this specific scenario. The simulation compares algor ithms’ performance for a wide range of ... points of multicopy protocols, with a sustained lead at every load. Differences in the latency a nd hop count trends—decreasing with network load for CHARON, but increasing for PRO...

Ngày tải lên: 21/06/2014, 11:20

... repeated with every image being a test image once. To reduce computational complexity, for each target out- put, we trained a set of classifiers, one for each training im- age. Hence, for each ... performance in comparison to the base (ICA-CDWS) classification. Inter- estingly, the recall score for image 5 is one of only two im- ages, where the stacking without feature extraction outp...

Ngày tải lên: 21/06/2014, 22:20

... fading with κ = 10 dB versus the number of users K with an OPE receiver for SIR = 5dBandm = 8, 16,32, 64,128. κ = 10, the cases of m = 16 and m = 32 compete for the optimal hop length, and the former ... bound for coded FHSS systems with MAI. Results show that the performance loss due to interference increases as the hop length increases (or in other words as the number of hops...

Ngày tải lên: 21/06/2014, 23:20

... throughput is 190 for ECOMF and 184 for ECOMP with an appropriate optimum threshold value at N  ≈ 80 for ECOMF and ρ th = 0.25 for ECOMP. The optimal values of ρ th and k for ECOMP for each channel condition ... recover the erased packets for users with inadequate instantaneous SNR, ECOMP makes use of RS-code with the same encoding scheme as described in Section 2 .For s...

Ngày tải lên: 21/06/2014, 11:20

... afficinrealsystems.RT traffics such as voice streaming have constant bit rate (CBR) feature. Margin adaptation for OFDMA systems [14] is considered as the most efficient resource allocation scheme for power ... Algorithms. Diverse packet scheduling algorithms were introduced and their performances were evaluated in terms of system throughput and fairness [16–18]. For the best fairness,...

Ngày tải lên: 21/06/2014, 11:20

... and fairness enhancements in AIR systems. Appendices In the fol lowing, we derive the calculation for the cumulative density function of the achievable rate for the system with constant information ... users Benchmark Sum rate Rate-adaptive Figure 10: Sum rate for AIR and CIR systems for a Network Coding group with M = 5 nodes. Variable rate nonbinary LDPC codes with 64 QA...

Ngày tải lên: 21/06/2014, 11:20

... different random topologies and for each topology we performed 100 random lookups. Average values and confidence intervals ( when applicable) were reported for the following performance metrics being investigated: (i) ... in the overlay network to perform a lookup for a specific resource, (ii) corresponding number of physical hops traveled in the physical network to perform a lookup for...

Ngày tải lên: 21/06/2014, 11:20