Precoder Designs for MIMO Gaussian Multiple Access Wiretap Channels

This paper studies multiple-input multiple-output multiple access wiretap channels (MAC-WT) where an eavesdropper tries to tap the communication between multiple legitimate transmitters and a legitimate receiver. In this system, we propose precoder optimization methods at the transmitters in order t...

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Vydáno v:IEEE transactions on vehicular technology Ročník 66; číslo 9; s. 8563 - 8568
Hlavní autoři: Lee, Hoon, Song, Changick, Moon, Jihwan, Lee, Inkyu
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.09.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithm design and analysis
Algorithms
Channels
Communications systems
Complexity
Complexity theory
Computer simulation
Covariance matrices
Kuhn-Tucker method
MIMO
MIMO (control systems)
MIMO systems
Multiple access
Multiple access wiretap channel (MAC-WT)
Optimization
Power control
Receivers
secrecy rate maximization
Silicon
Transmitters
Wiretapping
ISSN:0018-9545, 1939-9359
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Shrnutí:This paper studies multiple-input multiple-output multiple access wiretap channels (MAC-WT) where an eavesdropper tries to tap the communication between multiple legitimate transmitters and a legitimate receiver. In this system, we propose precoder optimization methods at the transmitters in order to maximize the sum secrecy rate performance. Although this problem can be solved by the well-known difference of convex (DC) programming, we present a more efficient algorithm whose computational complexity is much lower than that of the conventional DC approach. By investigating the Karush-Kuhn-Tucker conditions, it is confirmed that the proposed low-complexity algorithm achieves the same performance as the conventional DC method. Our analysis also reveals that the proposed algorithm ensures global optimality for multiple-input single-output MAC-WT cases, while binary power control is optimal for single-input multiple-output scenarios. Simulation results demonstrate the efficacy of the proposed precoding methods.
Bibliografie:ObjectType-Article-1
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2017.2678601