Resource optimization for multi antenna cognitive radio networks

... RESOURCE OPTIMIZATION FOR MULTI- ANTENNA COGNITIVE RADIO NETWORKS ZHANG LAN (M Eng., University of Electronic Science and Technology of China) A THESIS SUBMITTED FOR THE DEGREE ... in multi- antenna CR networks under the spectrum sharing model First, we study the resource optimization problems for three different multi- antenna CR channels, including the CR sing...

Ngày tải lên: 11/09/2015, 10:18

... al.: Selective sensing and transmission for multi-channel cognitive radio networks EURASIP Journal on Wireless Communications and Networking 2011 2011:7 Submit your manuscript to a journal and ... energy and time for sensing The rest of the article is organized as follows After introducing the system model and problem formulation, the periodic sensing and sele...

Ngày tải lên: 21/06/2014, 03:20

... Fair, efficient, and power-optimized spectrum sharing scheme for cognitive radio networks Saleem Aslam and Kyung Geun Lee* Department of Information and Communication Engineering, ... Vlantis, GJ Pottie, Efficient, flexible and scalable inter-network spectrum sharing and communications in cognitive IEEE 802.22 networks, in Proceedings of the IEEE Conference o...

Ngày tải lên: 18/06/2014, 22:20

... 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

... implemented for comparison purposes: the Centralized Tabu-Based Algorithm (CTBA) [6] and a random channel attribution method (RANDOM) We evaluate the performance of channel assignment by analyzing ... statement For small networks that not show significant variations (due to node mobility or change in the channel availability), a suitable approach for channel assignment...

Ngày tải lên: 21/06/2014, 02:20

... 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

... coverage area of base stations are adjusted to tackle the large-scale mobility of users For nonreal-time users, QoS is defined as a maximum delay constraint and a required average bit rate Data traffic ... 412–421, Anchorage, Alaska, USA, April 2001 [15] J.-W Lee, R R Mazumdar, and N B Shroff, “Joint resource allocation and base-station assignment for the downlink in CDMA networks,”...

Ngày tải lên: 22/06/2014, 22:20

... coverage area of base stations are adjusted to tackle the large-scale mobility of users For nonreal-time users, QoS is defined as a maximum delay constraint and a required average bit rate Data traffic ... 412–421, Anchorage, Alaska, USA, April 2001 [15] J.-W Lee, R R Mazumdar, and N B Shroff, “Joint resource allocation and base-station assignment for the downlink in CDMA networks,”...

Ngày tải lên: 22/06/2014, 22:20

... 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

... 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

... 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

... sub-carrier bandwidth Bopt is obtained using (33) VII Sub-carrier power allocation, bandwidth sizing and bit loading After having addressed the power allocation, bit loading and bandwidth sizing individually, ... corresponding sub-carrier bandwidth Bopt is obtained using (33) XII Sub-carrier power allocation, bandwidth sizing and bit loadin...

Ngày tải lên: 21/06/2014, 00:20

... network is presented in Network overview’ section We describe spectrum sharing among PUs in ‘On-demand spectrum sharing between PUs’ section ‘Spectrum sharing between PUs and SUs using trading’ ... cognitive mesh network using machine learning EURASIP Journal on Wireless Communications and Networking 2011 2011:36 Submit your manuscript to a journal and benefit from: Convenie...

Ngày tải lên: 21/06/2014, 02:20