Cognitive Radio: An Information-Theoretic Perspective

By Aleksandar Jovičić, Pramod Viswanath. 2006 IEEE International Symposium on Information Theory, 2006

801 citations recorded by the source corpus.

Cognitive radios have been proposed as a means to implement efficient reuse of the licensed spectrum. The key feature of a cognitive radio is its ability to recognize the primary (licensed) user and adapt its communication strategy to minimize the interference that it generates. We consider a communication scenario in which the primary and the cognitive user wish to communicate to different receivers, subject to mutual interference. Modeling the cognitive radio as a transmitter with side-information about the primary transmission, we characterize the largest rate at which the cognitive radio can reliably communicate under the constraint that (i) no interference is created for the primary user, and (ii) the primary encoder-decoder pair is oblivious to the presence of the cognitive radio

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/1131bc0583a0aaf552703e31856dc6fc75e14bb4

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In Computer Networks and Communications

In Electrical and Electronic Engineering

Citations in the corpus

Proactive eavesdropping via cognitive jamming in fading channels (2015, background): “2), we omit the detail here, and leave it in Appendix D. 8”
Interference Alignment and Spatial Degrees of Freedom for the K User Interference Channel (2007, background): “Based on the cognitive radio model introduced in [25]–[27] cognitive message sharing refers to the form of cooperation where a message is made available non-causally to some transmitters and/or receivers besides the intended source and destination of the message.”
Breaking Spectrum Gridlock With Cognitive Radios: An Information Theoretic Perspective (2009, background): “• Cooperation: The cognitive encoder increases the rate of the noncognitive user by (partially) relaying its message to its decoder.”
COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS - The Throughput Potential of Cognitive Radio: A Theoretical Perspective (2007, background): “The power distribution is calculated so that the SNR at the primary receiver remains the same with or without the secondary user [6].”
Capacity Limits and Performance Analysis of Cognitive Radio With Imperfect Channel Knowledge (2010, background): “Another example is primary secondary collaboration and exchange, where information about h sp could directly be fed back from the PU receiver to the SU transmitter, as proposed in [17] .”
Spectrum Leasing to Cooperating Secondary Ad Hoc Networks (2008, methodology): “The commons model is currently being studied using different tools such as information theory [7] [8], partially observable Markov chains [9] and queuing theory [10].”
Degrees of Freedom Region of the MIMO $X$ Channel (2008, background): “This channel is called the “cognitive radio” channel in [23], [24] and its capacity region was determined under the assumption of weak interference in [25], [26].”
Cooperative decode-and-forward relaying for secondary spectrum access (2009, background): “The role of cooperative transmission, albeit in a non-causal fashion, in cognitive radios has been treated in [9].”
On Ergodic Sum Capacity of Fading Cognitive Multiple-Access and Broadcast Channels (2008, background): “It is also noted that there has been study in the literature on the informationtheoretic limits of the CR channels by exploiting other types of “cognitions” available at the CR terminals different from the IT, such as the knowledge of the primary user transmit essages at the CR transmitter [8],…”
What is a Spectrum Hole and What Does it Take to Recognize One? (2009, background): “It has been proposed that the secondary transmitter may be able to decode the primary signal and use dirty paper coding (DPC) techniques and simultaneously boost the primary signal in the direction of interference [46], [47].”
Cognitive radio networks (2008, neutral): “When the interference to the primary user is weak ( h 21 1), rate region (d) has been shown to be the capacity region in Gaussian noise [18] and in related discrete memoryless channels [19].”
Advances on Spectrum Sensing for Cognitive Radio Networks: Theory and Applications (2017, background): “(2) The secondary user splits its own power into two parts, one used to raise the primary user power in order to mitigate the interference effect caused by the secondary user data and the other part is utilized to carry the secondary user data [12].”
Stable Throughput of Cognitive Radios With and Without Relaying Capability (2007, background): “While the first group is allowed to access the spectrum any time, the second seeks opportunities for transmission by exploiting the idle periods of primary nodes [1].”