Optimal Power Allocation for Artificial Noise under Imperfect CSI against Spatially Random Eavesdroppers
arXiv:1601.01183 · doi:10.1109/TVT.2015.2513003
Abstract
In this correspondence, we study the secure multiantenna transmission with artificial noise (AN) under imperfect channel state information in the presence of spatially randomly distributed eavesdroppers. We derive the optimal solutions of the power allocation between the information signal and the AN for minimizing the secrecy outage probability (SOP) under a target secrecy rate and for maximizing the secrecy rate under a SOP constraint, respectively. Moreover, we provide an interesting insight that channel estimation error affects the optimal power allocation strategy in opposite ways for the above two objectives. When the estimation error increases, more power should be allocated to the information signal if we aim to decrease the rate-constrained SOP, whereas more power should be allocated to the AN if we aim to increase the SOP-constrained secrecy rate.
7 pages, 6 figures
References in corpus (2)
Cited by in corpus (4)
- Safeguarding Decentralized Wireless Networks Using Full-Duplex Jamming Receivers
- Impact of Artificial Noise on Cellular Networks: A Stochastic Geometry Approach
- Secrecy of Multi-Antenna Transmission with Full-Duplex User in the Presence of Randomly Located Eavesdroppers
- Securing Multi-User Broadcast Wiretap Channels with Finite CSI Feedback