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Policy-based spectrum access control for dynamic spectrum access network radios
Journal of Web Semantics, 2009We describe the design of a policy-based spectrum access control system for the Defense Advanced Research Projects Agency (DARPA) NeXt Generation (XG) communications program to overcome harmful interference caused by a malfunctioning device or a malicious user.
Filip Perich, Mark McHenry
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Cooperative Spectrum Sensing for Dynamic Spectrum Access
2009 WRI International Conference on Communications and Mobile Computing, 2009In cognitive networks, cooperative spectrum sensing is employed to detect the presence of primary user quickly. In this paper, we study the sensing performance of a cognitive user U1 by allowing another cognitive user U2 to act as its relay. We vary the scaling factors (used by the relay U2 to amplify its received signal) of the unconstrained scheme ...
Yunxue Liu +5 more
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Characterizing spectrum goodness for dynamic spectrum access
2012 50th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2012The combination of exclusive use spectrum licensing and growing demand for voice, data, and video applications is leading to artificial spectrum scarcity. A recent approach to alleviate this artificial spectrum scarcity innovatively uses unused TV spectrum, also called the TV white spaces, through dynamic spectrum access (DSA) techniques.
Aakanksha Chowdhery +3 more
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Spectrum Simulation Testbed for Dynamic Spectrum Access
2008 3rd IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2008The joint spectrum center (JSC) has developed a Spectrum Simulation Testbed to model networking and spectrum aspects of wireless tactical networks. The spectrum simulation testbed uses OPNET Modeler to model a dynamic spectrum manager (DSM) technique that uses geographic position and spectral use information to assign spectrum resources to ...
Eugene Pappas +3 more
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2015
We present another spectrum sharing architecture called dynamic spectrum co-access (DSCA), to enable secondary users to simultaneously access spectrum with primary users, to create a win-win situation for both. In this architecture, the secondary user uses a portion of its transmit power to provide incentives to primary users. Different from the IC-DSA
ChunSheng Xin, Min Song
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We present another spectrum sharing architecture called dynamic spectrum co-access (DSCA), to enable secondary users to simultaneously access spectrum with primary users, to create a win-win situation for both. In this architecture, the secondary user uses a portion of its transmit power to provide incentives to primary users. Different from the IC-DSA
ChunSheng Xin, Min Song
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Traffic-Demand Dynamic Spectrum Access
2008 4th International Conference on Wireless Communications, Networking and Mobile Computing, 2008Cognitive radio was deemed to an effective solution to the current shortage of spectrum resources. The most important part of the technique is open spectrum access. A naive spectrum allocation between CR users may lead to significant interference and reduce and reduce the usage of the spectrum.
Xianzhong Xie +3 more
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Spatial distributed dynamic spectrum access
2013 IEEE International Conference on Communications (ICC), 2013The spatial aspect of distributed dynamic spectrum access (DSA) in a wireless ad hoc network is usually overlooked in the literature. By using tools from stochastic geometry, we analytically characterized the spatial distribution of users and subsequent interference in the network.
Ching-Yueh Kao +2 more
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OFDM-Based Dynamic Spectrum Access
2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN), 2010Optimal utilization of radio resources (bandwidth, transmit power) in multi-carrier based systems becomes very challenging due to coexistence of various wireless standards within the same frequency band. One possible solution is dynamic spectrum access (DSA) approach that allows several standards or users to opportunistically share the available ...
Milan Zivkovic +2 more
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Audio channel Dynamic Spectrum Access
IEEE SOUTHEASTCON 2014, 2014A prototype Dynamic Spectrum Access (DSA) system is implemented, for ease of implementation, using the audio spectrum. In this setup, laptop PCs behave as two software defined radios (SDR), one a primary user (PU) and the other a secondary user (SU).
Amos Ajo +3 more
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Efficient dynamic spectrum access implementation
2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE, 2010Shared Spectrum Company developed Dynamic Spectrum Access (DSA) technology that enables military radio communication systems to deliver robust, non-interrupted wireless connectivity to tactical networks technology. DSA allows network operators to adapt to last minute spectrum assignment planning changes as well as changes made after deployment.
Filip Perich +4 more
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