Abstract
This work investigates the effect of limiting source signals to finite-alphabet on the secrecy rate of a multi-antenna wiretap system. Existing works have characterized maximum achievable secrecy rate or secrecy capacity for single- and multi-antenna systems based on Gaussian source signals and secrecy code. Despite the impracticality of Gaussian source, its compact closed-form expression of mutual information motivated broad use of Gaussian input assumption. for practical consideration, we study the effect of finite discrete-constellation on instantaneous and ergodic secrecy rate of multiple-antenna wire-tap channels. Our results demonstrate substantial difference between systems involving finite-alphabet inputs and systems with Gaussian inputs. Results from Gaussian inputs serve as upper-bound of secrecy rate for practical systems with finite alphabet inputs. © 2006 IEEE.
Recommended Citation
S. Bashar et al., "On the Secrecy Rate of Multi-antenna Wiretap Channel under Finite-alphabet Input," IEEE Communications Letters, vol. 15, no. 5, pp. 527 - 529, article no. 5741764, Institute of Electrical and Electronics Engineers, May 2011.
The definitive version is available at https://doi.org/10.1109/LCOMM.2011.032811.102539
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
eavesdropping; ergodic secrecy rate; finite-alphabet input; information-theoretic security; Wiretap channel
International Standard Serial Number (ISSN)
1089-7798
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
01 May 2011
Comments
National Science Foundation, Grant 0520126