Joint power allocation and artificial noise design for multiuser wiretap OFDM channels

Joint power allocation and artificial noise design for multiuser wiretap OFDM channels

This paper considers an OFDM wiretap channel with a legitimate transmitter (Alice), multiple legitimate receivers (Bobs), and an eavesdropper (Eve). Alice simultaneously transmits confidential message to each individual Bob. The timedomain Artificial noise (AN) is firstly employed to the wiretap OFD...

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Hauptverfasser: Haohao Qin, Xiang Chen, Xiaofeng Zhong, Fei He, Ming Zhao, Jing Wang
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Sprache:eng
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Noise
OFDM
Receivers
Resource management
Security
Time-domain analysis
Transmitters
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Xiang Chen
Xiaofeng Zhong
Fei He
Ming Zhao
Jing Wang
description This paper considers an OFDM wiretap channel with a legitimate transmitter (Alice), multiple legitimate receivers (Bobs), and an eavesdropper (Eve). Alice simultaneously transmits confidential message to each individual Bob. The timedomain Artificial noise (AN) is firstly employed to the wiretap OFDM channel with multiple Bobs. Under the proposed AN approach, a nonconvex sum secrecy rate maximization problem is formulated to jointly optimize subcarrier allocation, power allocation and AN design. To solve this tough problem, the optimal subcarrier allocation is found at first, and then a low-complexity Lagrange dual method is developed to jointly optimize power allocation and AN design. Finally, numerical results demonstrate the effectiveness of the proposed algorithms, including power allocation gain, AN gain and multiuser gain.
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subjects Noise
OFDM
Receivers
Resource management
Security
Time-domain analysis
Transmitters
title Joint power allocation and artificial noise design for multiuser wiretap OFDM channels
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