Optimal power allocation for fading channels in cognitive radio networks

... capacities for a single-SU fading CR channel Chapter studies outage capacity regions for fading C-MAC In Chapter 4, the optimal power allocation for fading CR networks with PU outage constraint is ... for various fading CR networks, including single CR point-to-point channel, cognitive MAC, and cognitive OFDM systems For a single SU point-to-point fading cha...

Ngày tải lên: 11/09/2015, 10:15

... Decentralized estimation over orthogonal multipleaccess fading channels in wireless sensor networks— optimal and suboptimal estimators Xin Wang∗1 and Chenyang Yang1 School of Electronics and ... Abstract We study optimal and suboptimal decentralized estimators in wireless sensor networks over orthogonal multipleaccess fading channels in this...

Ngày tải lên: 18/06/2014, 22:20

... Decentralized estimation over orthogonal multipleaccess fading channels in wireless sensor networks— optimal and suboptimal estimators Xin Wang∗1 and Chenyang Yang1 School of Electronics and ... Abstract We study optimal and suboptimal decentralized estimators in wireless sensor networks over orthogonal multipleaccess fading channels in this...

Ngày tải lên: 20/06/2014, 04:20

... the sensing and data transmission in accordance with the PRR based time slot allocation, while the PHY layer performs adaptive modulation and coding to allow data transmission rate adaptation At ... action can be taken Sensing information can be a consideration for QoS requirements especially in multimedia application as it can assist C -UWB to dynamically allocate app...

Ngày tải lên: 21/06/2014, 11:20

... Joint cooperative relay scheme for spectrum-efficient usage and capacity improvement in cognitive radio networks Qixun Zhang∗ , Zhiyong Feng and Ping Zhang Wireless Technology Innovation Institute ... which is divided into two time slots t0i and tij for receiving and transmitting on two relay links in Figure 2, where rji = αji (0 < αji < 1) denotes the DyTSA...

Ngày tải lên: 21/06/2014, 17:20

... both physical (PHY) layer and medium access control (MAC) layer In this thesis, we focus on cognitive radio networks (CRN) and aim to improve the spectrum sensing performance at the PHY layer and ... Sensing Strategies for Cognitive Radio Mesh Networks Chapter Cooperative Spectrum Sensing Strategies for Cognitive Radio Mesh Networks In this chap...

Ngày tải lên: 10/09/2015, 15:53

... Cooperative spectrum sensing in cognitive radio, part I: two user networks IEEE Trans Wirel Commun 6(6), 2204–2213 (2007) G Ganesan, Y (G) Li, Cooperative spectrum sensing in cognitive radio, part ... Yu et al.: Optimization of cooperative spectrum sensing with sensing user selection in cognitive radio networks EURASIP Journal on Wireless Commun...

Ngày tải lên: 20/06/2014, 21:20

... delay and mean waiting time are also in our considerations For evaluating the spectrum- sharing mechanisms in the CRN, metrics that we consider include force-termination probability of SU PFT-su, mean ... channels by sensing Different from traditional sensing-based CRNs, QoS guarantee for SUs has to be considered in spectrum- sharing mechanism design In Conclusion In the j...

Ngày tải lên: 20/06/2014, 22:20

... component of the emerging cognitive radio networks In this article, we Page of study the spectrum sensing problem jointly taking the fading and the location of SUs into account We obtain the overall ... Consequently, the spectrum sensing with jointly taking the fading and location of SUs into account is more suitable for the small scale network Concluding remarks Spectrum sen...

Ngày tải lên: 21/06/2014, 00:20

... and validates the analytical model presented in the previous section Finally, in Section 5, we present the conclusions of the work The Lion Attack 2.1 Target and Motivation The Lion attack is a ... Mitigating the Lion Attack As explained in Section 2.2, a Lion attack forces the CRN to perform a frequency handoff, incurring a substantial delay until transmi...

Ngày tải lên: 21/06/2014, 11:20

... information In this section, we describe the scenario of collaborative spectrum sensing and present two attack models 2.1 Collaborative Spectrum Sensing In cognitive radio networks, secondary users ... is insider attack that targets collaborative spectrum sensing In current collaborative sensing schemes, secondary users are often assumed to report their...

Ngày tải lên: 21/06/2014, 19:20

... Abstract Innovative Approaches to Spectrum Selection, Sensing, and Sharing in Cognitive Radio Networks In a cognitive radio network (CRN), bands of a spectrum are shared by licensed (primary) and ... Innovative Approaches to Spectrum Selection, Sensing, and Sharing in Cognitive Radio Networks by Chittabrata Ghosh B.Tech (Kalyani Univer...

Ngày tải lên: 30/10/2014, 20:09

... the design of cognitive radio MAC is no longer an independent task for MAC layer, the researchers have been learning and investigating the approach on joint design of spectrum sensing and MAC ... spectrum sensing and cognitive radio MAC protocols The fundamentals of various spectrum sensing methods and cognitive radio MAC protocols are descr...

Ngày tải lên: 10/09/2015, 08:28

... programming algorithm for link scheduling and joint rate and power control in wireless data packet relay networks with fading channels This approach captures the real-time utility of the network and ... allocation of link scheduling to the incoming links or the outgoing link, depending on whether or not the buffer level exceeds EURASIP Journal on Wireless...

Ngày tải lên: 22/06/2014, 19:20

... Section to obtain convex formulations for tight inner and outer bounds on the SPCGS region along with the corresponding power allocations In addition, in Section 5, we will use these formulations ... information for User 2 (iii) For a fixed value of U1 , the signal U1 contains particular information for User U2 (iv) The signal contains common information for all users, and pa...

Ngày tải lên: 21/06/2014, 23:20