Abstract
In this paper, we analyze the performance of regularized channel inversion (RCI) precoding in multiple-input single-output (MISO) broadcast channels with confidential messages under transmit-side channel correlation. We derive a deterministic equivalent for the achievable per-user secrecy rate which is almost surely exact as the number of transmit antennas and the number of users grow to infinity in a fixed ratio, and we determine the optimal regularization parameter that maximizes the deterministic equivalent of the secrecy rate. Furthermore, we obtain deterministic equivalents for the secrecy rates achievable by: (i) zero forcing precoding and (ii) single user beamforming. The accuracy of our analysis is validated by simulations of finite-size systems.
Original language | English |
---|---|
Article number | 6515483 |
Pages (from-to) | 1164-1167 |
Number of pages | 4 |
Journal | IEEE Communications Letters |
Volume | 17 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2013 |
Externally published | Yes |
Keywords
- broadcast channel
- channel correlation
- linear precoding
- Physical layer security
- random matrix theory