Abstract
This work investigates the effect of finite-alphabet input constraint on the secrecy rate of a multi-antenna wiretap channel. Most existing works have characterized maximum achievable secrecy rate or secrecy capacity for single and multiple antenna systems based on Gaussian source signals and secrecy code. for practical considerations, we study the effect of finite discrete-constellation on the achievable secrecy rate of multiple-antenna wire-tap channels. Our proposed precoding scheme converts the underlying multi-antenna system into a bank of parallel channels. based on this precoding strategy, we develop a decentralized power allocation algorithm based on dual decomposition to maximize the achievable secrecy rate. in addition, we analyze the achievable secrecy rate for finite-alphabet inputs in low and high SNR regions. Our results demonstrate substantial difference in secrecy rate between systems given finite-alphabet inputs and systems with Gaussian inputs. © 2012 IEEE.
Recommended Citation
S. Bashar et al., "On Secrecy Rate Analysis of MIMO Wiretap Channels Driven by Finite-alphabet Input," IEEE Transactions on Communications, vol. 60, no. 12, pp. 3816 - 3825, article no. 6310164, Institute of Electrical and Electronics Engineers, Sep 2012.
The definitive version is available at https://doi.org/10.1109/TCOMM.2012.091212.110199
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
eavesdropping; finite-alphabet input; information-theoretic security; secrecy rate; Wiretap channel
International Standard Serial Number (ISSN)
0090-6778
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
27 Sep 2012
Comments
National Science Foundation, Grant 1147930