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304
Joint Tx-Rx beamforming design for multicarrier MIMO channels: a unified framework for convex optimization
- IEEE TRANS. SIGNAL PROCESSING
, 2003
"... This paper addresses the joint design of transmit and receive beamforming or linear processing (commonly termed linear precoding at the transmitter and equalization at the receiver) for multicarrier multiple-input multiple-output (MIMO) channels under a variety of design criteria. Instead of consid ..."
Abstract
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Cited by 297 (19 self)
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of considering each design criterion in a separate way, we generalize the existing results by developing a unified framework based on considering two families of objective functions that embrace most reasonable criteria to design a communication system: Schur-concave and Schur-convex functions. Once the optimal
Optimal Spectrum Sensing Framework for Cognitive Radio Networks
- IEEE TRANS. ON WIRELESS COMM
, 2008
"... Spectrum sensing is the key enabling technology for cognitive radio networks. The main objective of spectrum sensing is to provide more spectrum access opportunities to cognitive radio users without interfering with the operations of the licensed network. Hence, recent research has been focused on ..."
Abstract
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Cited by 117 (10 self)
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avoidance and the spectrum efficiency problem, an optimal spectrum sensing framework is developed. More specifically, first a theoretical framework is developed to optimize the sensing parameters in such a way as to maximize the sensing efficiency subject to interference avoidance constraints. Second
Optimal linear cooperation for spectrum sensing in cognitive radio networks
- IEEE J. SEL. TOPICS SIGNAL PROCESS
, 2008
"... Cognitive radio technology has been proposed to improve spectrum efficiency by having the cognitive radios act as secondary users to opportunistically access under-utilized frequency bands. Spectrum sensing, as a key enabling functionality in cognitive radio networks, needs to reliably detect signal ..."
Abstract
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Cited by 122 (8 self)
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signals from licensed primary radios to avoid harmful interference. However, due to the effects of channel fading/shadowing, individual cog-nitive radios may not be able to reliably detect the existence of a primary radio. In this paper, we propose an optimal linear cooperation framework for spectrum
Robust Distributed Spectrum Sensing in Cognitive Radio Networks
, 2006
"... Abstract—Cognitive radio is an enabling technology for efficient utilization of radio spectrum. A key function of cognitive radios is spectrum sensing, which enables secondary users to identify vacant spectrum not used by primary users (a.k.a. spectrum “white spaces”). Although spectrum sensing is o ..."
Abstract
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Cited by 68 (0 self)
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is one of the essential functionalities of cognitive radios, its security-related problems have not been studied. In this paper, we consider a cognitive radio network that employs a distributed spectrum sensing framework. Under this framework, we associate a secondary user terminal reporting false
Cooperative caching for chip multiprocessors
- In Proceedings of the 33nd Annual International Symposium on Computer Architecture
, 2006
"... Chip multiprocessor (CMP) systems have made the on-chip caches a critical resource shared among co-scheduled threads. Limited off-chip bandwidth, increasing on-chip wire delay, destructive inter-thread interference, and diverse workload characteristics pose key design challenges. To address these ch ..."
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Cited by 145 (1 self)
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these challenge, we propose CMP cooperative caching (CC), a unified framework to efficiently organize and manage on-chip cache resources. By forming a globally managed, shared cache using cooperative private caches. CC can effectively support two important caching applications: (1) reduction of average memory
Robust Composition: Towards a Unified Approach to Access Control and Concurrency Control
, 2006
"... Permission is hereby granted to make and distribute verbatim copies of this document without royalty or fee. Permission is granted to quote excerpts from this documented provided the original source is properly cited. ii When separately written programs are composed so that they may cooperate, they ..."
Abstract
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Cited by 124 (11 self)
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, they may instead destructively interfere in unanticipated ways. These hazards limit the scale and functionality of the software systems we can successfully compose. This dissertation presents a framework for enabling those interactions between components needed for the cooperation we intend, while
Experimental Study of Spectrum Sensing based on Energy Detection and Network Cooperation
- in Proc. of the ACM 1st International Workshop on Technology and Policy for Accessing Spectrum (TAPAS
, 2006
"... Spectrum sensing has been identified as a key enabling functionality to ensure that cognitive radios would not interfere with primary users, by reliably detecting primary user signals. Recent research studied spectrum sensing using energy detection and network cooperation via modeling and simulation ..."
Abstract
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Cited by 86 (1 self)
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Spectrum sensing has been identified as a key enabling functionality to ensure that cognitive radios would not interfere with primary users, by reliably detecting primary user signals. Recent research studied spectrum sensing using energy detection and network cooperation via modeling
Enhanced Robust Cooperative Spectrum Sensing in Cognitive Radio
"... Abstract: As wireless spectrum resources become more scarce while some portions of frequency bands suffer from low utilization, the design of cognitive radio (CR) has recently been urged, which al-lows opportunistic usage of licensed bands for secondary users without interference with primary users. ..."
Abstract
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Cited by 2 (0 self)
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. Spectrum sensing is fun-damental for a secondary user to find a specific available spec-trum hole. Cooperative spectrum sensing is more accurate and more widely used since it obtains helpful reports from nodes in different locations. However, if some nodes are compromised and report false sensing data
1 Evolutionary Cooperative Spectrum Sensing Game:
"... Abstract—Cooperative spectrum sensing has been shown to be able to greatly improve the sensing performance in cognitive radio networks. However, if cognitive users belong to different service providers, they tend to contribute less in sensing in order to increase their own throughput. In this paper, ..."
Abstract
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Cited by 37 (13 self)
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, we propose an evolutionary game framework to answer the question of “how to collaborate ” in multiuser de-centralized cooperative spectrum sensing, because evolutionary game theory provides an excellent means to address the strategic uncertainty that a user/player may face by exploring different
Unified Analysis of Cooperative Spectrum Sensing over Generalized Multipath Fading Channels
"... Abstract—The present work is devoted to the analytic perfor-mance evaluation of cooperative spectrum sensing (CSS) over generalized fading channels. The proposed analysis is based on the efficient Gaussian-Finite-Mixture (GFM) that allows the derivation of a simple and accurate closed-form expressio ..."
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Cited by 2 (2 self)
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Abstract—The present work is devoted to the analytic perfor-mance evaluation of cooperative spectrum sensing (CSS) over generalized fading channels. The proposed analysis is based on the efficient Gaussian-Finite-Mixture (GFM) that allows the derivation of a simple and accurate closed
Results 1 - 10
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304
