Báo cáo hóa học: " Adaptive Downlink Resource Allocation Strategies for Real-Time Data Services in OFDM Cellular Systems" ppt

... 6, the perfor- mance of the two schemes (using the algorithms in Section 5) is evaluated for real-time data services in different shado wing environments. 2. RESOURCE ALLOCATION IN OFDM SYSTEMS The ... in downlink OFDM mo- bile cellular systems, the probability of interference occur- rence is an important factor in determining the system per- formance, which shoul...

Ngày tải lên: 22/06/2014, 22:20

... scheme in this subsection. For gaining insight into the power allocation based on minimizing the SER, we are going to minimize the approximate MGF of the random variable γ, obtained in (51). Using ... results attained in Section 4 for finding SER for AF opportunistic relaying coincide with the simulation results. Since the curves corresponding to R relays are par allel to each ot...

Ngày tải lên: 21/06/2014, 19:20

... determine the order of a model using information theory. Using the expression given in [9] for the AIC, the number of sources is the integer  d which, for m ∈{0, 1, , M − 1}, minimizes the following quantity: AIC(m) =−N(M ... in the CNET (France Telecom), Paris, France, where he was involved in indoor propa- gation studies for mobile communications. From 1994 to 1996, he was a te...

Ngày tải lên: 22/06/2014, 23:20

... merging principles exploited for adaptive resource al- location purpose, in the case of 2D time and frequency merg- ing. The related tr ansmission system thus combines OFDM and SS in both domains, ... transmission link. 8. CONCLUSION In this paper, we have studied adaptive loading principles ap- plied to SS -OFDM systems suitable for wireline networks in a multiple-user c...

Ngày tải lên: 22/06/2014, 19:20

... Communications Theory and Applications of OFDM, 2nd edn. (Springer, Boston, 2004) 3. N Hassan, M Assaad, Low complexity margin adaptive resource allocation in downlink MIMO-OFDMA system. IEEE Trans Wireless ... power joint allocation scheme in uplink OFDMA systems, in Proceedings of the IEEE Vehicular Technology Conference (VTC), Dublin, Ireland, 2756–2760 (Apr. 2007) 13. MJ...

Ngày tải lên: 21/06/2014, 01:20

... graph. Therefore, the resource allocation for these topologies is identical. In other words, the resource allocation in overlap- ping MBS Zones is to deal with the coloring problem for Nonisomorphic ... B. Hoang, “Applying graph coloring in resource coordination for a high-density wireless environ- ment,” in Proceedings of the IEEE 8th International Conference on Compu...

Ngày tải lên: 21/06/2014, 05:20

... allocation for multiuser OFDM cognitive radio systems,” in Proceedings of the 2nd International Conference on Communications and Networking in China (ChinaCom ’07), pp. 115–119, Shanghai, China, ... scheduling for OFDMA amplify-and-forward relay networks,” in Proceedings of the 70th IEEE Vehicular Technology Conference (VTC ’09), pp. 1–5, 2009. [15] T. Qin and C. Leung, “Fair a...

Ngày tải lên: 21/06/2014, 11:20

... the information theoretic rates. This implies that the optimization technique used in this paper can be incorporated as a building block in a variety of resource allocation settings. Lastly, in ... justified by examining bandwidth allocation (the power allocation follows a similar pattern) for k = 3 shown in Figure 6.We see that more bandwidth is allocated to the current link...

Ngày tải lên: 21/06/2014, 18:20

... MB -OFDM UWB systems can be performed by either adopting preamble training sequence or inserting pilot signals into each OFDM symbol. Here, we use a few pilots that are inserted into each OFDM ... 8). In other words, the FIC RR- WF algorithm is capable of achieving a substantial saving in complex- ity while maintaining a near full-rank WF performance. 7. Conclusion In this paper, a...

Ngày tải lên: 20/06/2014, 22:20

... MB -OFDM UWB systems can be performed by either adopting preamble training sequence or inserting pilot signals into each OFDM symbol. Here, we use a few pilots that are inserted into each OFDM ... 8). In other words, the FIC RR- WF algorithm is capable of achieving a substantial saving in complex- ity while maintaining a near full-rank WF performance. 7. Conclusion In this paper, a...

Ngày tải lên: 21/06/2014, 00:20