Báo cáo hóa học: " Research Article Achievable Rates and Scaling Laws for Cognitive Radio Channels" pdf

... Communications and Networking Volume 2008, Article ID 896246, 12 pages doi:10.1155/2008/896246 Research Article Achievable Rates and Scaling Laws for Cognitive Radio Channels Natasha Devroye, Mai Vu, and ... opportunities and take ac- tions based on the sensed information. Cognitive radios are prime candidates. 1.1. Cognitive radios and behavior Over the past...

Ngày tải lên: 22/06/2014, 19:20

... in AF and repetition DF. Figures 7 and 8 plot the achievable rates as a function of α which gives the fraction of total time/bandwidth allocated to the relay. Achievable rates are obtained for ... Wireless Communications and Networking Volume 2009, Article ID 458236, 16 pages doi:10.1155/2009/458236 Research Article Achievable Rates and Resource Allocation Strategi...

Ngày tải lên: 21/06/2014, 23:20

... Wireless Communications and Networking Volume 2011, Article ID 650619, 7 pages doi:10.1155/2011/650619 Research Ar ticle Channel Sensing without Quiet Period for Cognitive Radio Systems: A Pilot ... P802.22/D0.3.7, “Draft Standard for Wireless Regional Area Networks Part 22: Cognitive Wireless RAN Medium Access Control (MAC) and Physical Layer (PHY) specifica- tions: Policies...

Ngày tải lên: 21/06/2014, 05:20

... 0,R n  and BC 1  BC 1 −∞, 0,R n .PCJ, R n {φ : J → R n |φs is bounded and almost surely continuous for all but at most countable points s ∈ J and at these points s ∈ J, φs   and φs −  ... φs   and φs −  denote the right-hand and left-hand limits of the function φs, respectively. Especially, let PC  PC−∞, 0,R n . PC 1 J, R n {φ : J → R n |φs is b...

Ngày tải lên: 21/06/2014, 11:20

... ,x n 0 −1 ≤ 0 and x n 0 ∈ 0,c. Hindawi Publishing Corporation Advances in Difference Equations Volume 2010, Article ID 542073, 13 pages doi:10.1155/2010/542073 Research Article Complete Asymptotic and ... vector. On the other hand, for a small positive λ, there are always solutions of 7.1 which tend to a limit 2-cycle, and solutions which tend to the limit 1-cycle 0, 0,an...

Ngày tải lên: 21/06/2014, 11:20

... Corporation Advances in Difference Equations Volume 2010, Article ID 748789, 15 pages doi:10.1155/2010/748789 Research Article Exponential Stability and Global Attractors for a Thermoelastic Bresse System Zhiyong ... displacement, θ 1 and θ 3 are the temperature deviations from the T 0 along the longitudinal and vertical directions, E, G, ρ, I, m, k, h,andc are positive constants...

Ngày tải lên: 21/06/2014, 11:20

... Communications and Networking for MISO and MIMO systems and a Ped-B channel with N DL RB = 50 and N DL RB = 6 are shown in Figures 7 and 8, respectively. It is also observed that the performance of ... Finland, June 2000. Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010, Article ID 914934, 10 pages doi:10.1155/2010/914934 Re...

Ngày tải lên: 21/06/2014, 11:20

... false positives, and false negatives, and P and R denote the values of precision and recall, respectively. In addition, the Overall Accuracy, as defined in [9], is also used for the performance comparison ... 2009, Article ID 729494, 11 pages doi:10.1155/2009/729494 Research Article A Computationally Efficient Method for Polyphonic Pitch Estimation Ruohua Zhou, 1 Joshua D. Rei...

Ngày tải lên: 21/06/2014, 19:20

... matrix and the covariance of the noise plus interference signals. Consider, for example, the mutual information for independent Gaussian source symbols and Gaussian noise with covariance Q,givenH,andafixedW: I ( W | ... of the instantaneous rates log 2 (1+ρ i ) for two data streams and a permanent interferer, at E b /N 0 values of 2, 8 and 14 dB. The IRC-EXPM uses n b = 6 feedb...

Ngày tải lên: 21/06/2014, 20:20

... stability and overhead Although we did not make a specific stability test, Yartek has shown a good robustness since it run for several hours both for performing applications and for evaluating the performance ... show that the time performances of Yartek are similar to RTAI for the context switch time and that the time for task creation is much lower for Yartek than RTAI. How...

Ngày tải lên: 21/06/2014, 22:20