| 1. |
- Bjelakovic, Igor, et al.
(författare)
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On the strong converse for the broadcast capacity region of two-phase bidirectional relaying
- 2007
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Ingår i: Proceedings of the 2007 IEEE Information Theory Workshop on Information Theory for Wireless Networks, ITW. ; , s. 111-115
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Konferensbidrag (refereegranskat)abstract
- In our previous work we determined the weak capacity region for the broadcast phase of two-phase bidirectional relay channel. It turned out that the set of achievable rates obtained by optimizing over the two communication phases exceeds that obtained by using the network coding principle, i.e. by applying XOR to the decoded messages. In this paper we supplement our result by a proof of the strong converse with respect to the maximum error probability to the coding theorem for the broadcast phase. This result implies that the capacity region of that phase remains constant for a certain range of values of average error parameters [epsilon(1), epsilon(2)].
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| 2. |
- Boche, Holger, et al.
(författare)
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Game Theory in Signal Processing and Communications
- 2009
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Ingår i: EURASIP Journal on Advances in Signal Processing. - : Springer. - 1687-6172 .- 1687-6180.
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Game theory is a branch of mathematics aimed at the modeling and understanding of resource conflict problems. Essentially, the theory splits into two branches: noncooperative and cooperative game theory. The distinction between the two is whether or not the players in the game can make joint decisions regarding the choice of strategy. Noncooperative game theory is closely connected to minimax optimization and typically results in the study of various equilibria, most notably the Nash equilibrium. Cooperative game theory examines how strictly rational (selfish) actors can benefit from voluntary cooperation by reaching bargaining agreements. Another distinction is between static and dynamic game theory, where the latter can be viewed as a combination of game theory and optimal control. In general, the theory provides a structured approach to many important problems arising in signal processing and communications, notably resource allocation and robust transceiver optimization. Recent applications also occur in other emerging fields, such as cognitive radio, spectrum sharing, and in multihop-sensor and adhoc networks.
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| 3. |
- Günlü, Onur, et al.
(författare)
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Information Theoretic Methods for Future Communication Systems
- 2023
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Ingår i: Entropy. - : MDPI. - 1099-4300. ; 25:3
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- It is anticipated that future communication systems will involve the use of new technologies, requiring high-speed computations using large amounts of data, in order to take advantage of data-driven methods for improving services and providing reliability and other benefits [...]
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| 4. |
- Günlü, Onur, et al.
(författare)
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Private Key and Decoder Side Information for Secure and Private Source Coding
- 2022
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Ingår i: Entropy. - : MDPI. - 1099-4300. ; 24:12
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Tidskriftsartikel (refereegranskat)abstract
- We extend the problem of secure source coding by considering a remote source whose noisy measurements are correlated random variables used for secure source reconstruction. The main additions to the problem are as follows: (1) all terminals noncausally observe a noisy measurement of the remote source; (2) a private key is available to all legitimate terminals; (3) the public communication link between the encoder and decoder is rate-limited; and (4) the secrecy leakage to the eavesdropper is measured with respect to the encoder input, whereas the privacy leakage is measured with respect to the remote source. Exact rate regions are characterized for a lossy source coding problem with a private key, remote source, and decoder side information under security, privacy, communication, and distortion constraints. By replacing the distortion constraint with a reliability constraint, we obtain the exact rate region for the lossless case as well. Furthermore, the lossy rate region for scalar discrete-time Gaussian sources and measurement channels is established. An achievable lossy rate region that can be numerically computed is also provided for binary-input multiple additive discrete-time Gaussian noise measurement channels.
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| 5. |
- Günlü, Onur, et al.
(författare)
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Secure and Private Distributed Source Coding With Private Keys and Decoder Side Information
- 2023
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Ingår i: IEEE Transactions on Information Forensics and Security. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 1556-6013 .- 1556-6021. ; 18, s. 3803-3816
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Tidskriftsartikel (refereegranskat)abstract
- The distributed source coding problem is extended by positing that noisy measurements of a remote source are the correlated random variables that should be reconstructed at another terminal. We consider a secure and private distributed lossy source coding problem with two encoders and one decoder such that (i) all terminals noncausally observe a noisy measurement of the remote source; (ii) a private key is available to each legitimate encoder and all private keys are available to the decoder; (iii) rate-limited noiseless communication links are available between each encoder and the decoder; (iv) the amount of information leakage to an eavesdropper about the correlated random variables is defined as (v) secrecy leakage, and privacy leakage is measured with respect to the remote source; and (vi) two passive attack scenarios are considered, where a strong eavesdropper can access both communication links and a weak eavesdropper can choose only one of the links to access. Inner and outer bounds on the rate regions defined under secrecy, privacy, communication, and distortion constraints are derived for both passive attack scenarios. When one or both sources should be reconstructed reliably, the rate region bounds are simplified.
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| 6. |
- Günlü, Onur, et al.
(författare)
-
Secure and Private Source Coding with Private Key and Decoder Side Information
- 2022
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Ingår i: 2022 IEEE INFORMATION THEORY WORKSHOP (ITW). - : IEEE. - 9781665483414 - 9781665483421 ; , s. 226-231
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Konferensbidrag (refereegranskat)abstract
- The problem of secure source coding with multiple terminals is extended by considering a remote source whose noisy measurements are the correlated random variables used for secure source reconstruction. The main additions to the problem include 1) all terminals noncausally observe a noisy measurement of the remote source; 2) a private key is available to all legitimate terminals; 3) the public communication link between the encoder and decoder is rate-limited; and 4) the secrecy leakage to the eavesdropper is measured with respect to the encoder input, whereas the privacy leakage is measured with respect to the remote source. Exact rate regions are characterized for a lossy source coding problem with a private key, remote source, and decoder side information under security, privacy, communication, and distortion constraints. By replacing the distortion constraint with a reliability constraint, we obtain the exact rate region also for the lossless case. Furthermore, the lossy rate region for scalar discrete-time Gaussian sources and measurement channels is established.
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| 7. |
- Janda, Carsten Rudolf, et al.
(författare)
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Wiretap-Channels under Constrained Active and Passive Attacks
- 2015
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Ingår i: 2015 IEEE CONFERENCE ON COMMUNICATIONS AND NETWORK SECURITY (CNS). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781467378765 ; , s. 16-21
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Konferensbidrag (refereegranskat)abstract
- In this paper, the pessimistic multi letter common randomness assisted secrecy capacity for the Arbitrarily Varying Wiretap Channel (AVWC) under input and state constraints is derived.
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| 8. |
- Jorswieck, Eduard A., et al.
(författare)
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Delay-limited capacity : Multiple antennas, moment constraints, and fading statistics
- 2007
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Ingår i: IEEE Transactions on Wireless Communications. - 1536-1276 .- 1558-2248. ; 6:12, s. 4204-4208
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Tidskriftsartikel (refereegranskat)abstract
- Different performance measures are an important mean in order to analyze and design wireless communications systems. Examples of common performance measures are the ergodic capacity, the outage capacity, and the average mean-square error (MSE). In this work, we study the delay-limited capacity (DLC). The DLC depends on the properties of the fading channel, e.g. on the spatial correlation and on the line-of-sight (LOS) component. In this letter, we derive the DLC for the general class of parallel fading channels, including the multiple antenna channels under moment and long-term power constraint. We prove that the DLC is Schur-concave with respect to the spatial correlation in single-input multiple-output (SIMO), and multiple-input single-output (MISO). Bounds for the DLC of multiple-input multiple-output (MIMO) and parallel fading channels are derived and the impact of the the mean component and spatial correlation on these bounds is characterized.
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| 9. |
- Jorswieck, Eduard A., et al.
(författare)
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Majorization and Matrix-monotone Functions in Wireless Communications
- 2007
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- This short tutorial presents two mathematical techniques namely Majorization Theory and Matrix-Monotone Functions, reviews their basic definitions and describes their concepts clearly with many illustrative examples. In addition to this tutorial, new results are presented with respect to Schur-convex functions and regarding the properties of matrix-monotone functions. The techniques are applied to solve communication and information theoretic problems in wireless communications. The impact of spatial correlation in multiple antenna systems is characterized for many important performance measures, e.g., average mutual information, outage probability, error performance, minimum and wideband slope, zero-outage capacity, and capacity region. The impact of user distribution in cellular systems is characterized for different scenarios including perfectly informed transmitters and receivers, regarding, e.g., the average sum rate, the outage sum rate, maximum throughput. Finally, a unified framework for the performance analysis of multiple antenna systems is developed based on matrix-monotone functions. The optimization of transmit strategies for multiple antennas is carried out by optimization of matrix-monotone functions. The results within this framework resemble and complement the various results on optimal transmit strategies in single-user and multiple-user multiple-antenna systems.
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| 10. |
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