báo cáo hóa học: " ZAP: a distributed channel assignment algorithm for cognitive radio networks" pot

... Centralized Tabu-Based Algorithm (CTBA) [6] and a random channel attribution method (RANDOM).Weevaluatetheperformanceofchannel assignment by analyzing the percentage of removed interference achieved ... in ACM MobiHoc,68–77 (2005) 22. S Avallone, IF Akyildiz, G Ventre, A channel and rate assignment algorithm and a layer-2.5 forwarding paradigm for multi -radio wireless me...

Ngày tải lên: 21/06/2014, 02:20

... that us- ing training data has its disadvantages, for example, the accu- racy of τ R is a ected by the capability of the training data in capturing the true field. In practice, the training data ... determine an appropriate λ by a calibration pro- cedure. The calibration procedure is also used in [6]forpa- rameter choices. Generally speaking, a set of “training data” are randomly genera...

Ngày tải lên: 22/06/2014, 19:20

... - mary system, and each of them has identical bandwidth. Among these N channels, R channels are dedicated for PUs, and N - R channelsaresharedbyPUsandSUs .A SU can sense the shared chan nels by spectrum ... than PUs. Performance metrics such as mean system delay and force-termination probability of SU, average waiting time, and blocking probability of PU are evaluated with the steady-state...

Ngày tải lên: 20/06/2014, 22:20

... Conclusions Cognitive Radio Networks arise as a promising solution to share and take advantage of the scarcity of radio spectrum as well as to enhance the overall availability of transmitted data. These ... t D )) . (8) 2 EURASIP Journal on Wireless Communications and Networking channel when some input factors are greater than a certain threshold. As a na ¨ ıve example, the atta...

Ngày tải lên: 21/06/2014, 11:20

... Receiver for Cognitive Radio Applications Hassan Zamat 1 and Balasubramaniam Natarajan 2 1 IBM Systems and Technolog y Group, 4660 La Jolla Village Dr., Suite 300, San Diego, CA 92127, USA 2 Director ... & Sons, New York, NY, USA, 2nd edition, 1979. [23] V. C. Raykar, R. Duraiswani, and B. Krishnapuram, A fast algorithm for learning a ranking function from large-scale data se...

Ngày tải lên: 21/06/2014, 20:20

... CA, Zuba- Surma EK, Al-Mallah M, Dawn B: Adult bone marrow-derived cells for cardiac repair: a systematic review and meta-analysis. Archives of internal medicine 2007, 167(10):989-997. 5. Mazhari ... in treatment of cardiovascular disease [23]. Non-cell based therapies as opposed to cell-based therapies are generally easier to manufacture and are safer as they are non-viable and do not el...

Ngày tải lên: 20/06/2014, 03:20

... Petta CA, Ferriani RA, Abrao MS, Hassan D, Rosa E, Silva JC, Podgaec S, Bahamondes L: Randomized clinical trial of a levonorgestrel-releasing intrauterine system and a depot GnRH analogue for ... using a dot as the plot symbol. A non- parametric discriminant analysis with normal kernels and unequal bandwidths [27] was performed. A one-way analysis of variance (ANOVA) of the change...

Ngày tải lên: 20/06/2014, 15:20

... available at the transmitter. We now establish an analogous relationship when only partial CSI is available. The imperfect CSI that is available to the BS is modeled as follows. We assume that ... relationship was used to study the performance of a resource allocation scheme when only partial CSI is available. It is found that the performance varies greatly with the quality of the partial C...

Ngày tải lên: 21/06/2014, 11:20

... We remark that a notable feature that does not exist in the single- relay case is that the multiple relays can act as a virtual antenna array so that beamforming gain can be reaped at the receiver. ... covariance matrix N A af . The residual signal at terminal B equals H af H A λ A (t) plus a noise vector with covariance matrix N B af . Therefore, after self-signal subtraction, th...

Ngày tải lên: 21/06/2014, 17:20

... Hawaii, USA, April 2007. [10] J. M. Cioffi,S.Jagannathan,W.Lee,etal.,“Greenercopper with dynamic spectrum management,” AccessNets, Las Vegas, Nev, USA, 2008. [11] S. Jagannathan, C. S. Hwang, and ... precoding, and therefore, both amplitude and phase of the channels are estimated. This paper describes an estimator for simultaneously obtaining the square-magnitude of the FEXT and NEXT channels...

Ngày tải lên: 21/06/2014, 22:20