Abstract
Considering a multiple-user multiple-input multiple-output channel with an eavesdropper, this letter develops a beamformer design to optimize the energy efficiency in terms of secrecy bits per Joule under secrecy quality-of-service constraints. This is a very difficult design problem with no available exact solution techniques. A path-following procedure, which iteratively improves its feasible points by using a simple quadratic program of moderate dimension, is proposed. Under any fixed computational tolerance, the procedure terminates after finitely many iterations, yielding at least a locally optimal solution. Simulation results show the superior performance of the obtained algorithm over other existing methods.
Original language | English (US) |
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Article number | 7807263 |
Pages (from-to) | 236-239 |
Number of pages | 4 |
Journal | IEEE Signal Processing Letters |
Volume | 24 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2017 |
All Science Journal Classification (ASJC) codes
- Signal Processing
- Electrical and Electronic Engineering
- Applied Mathematics
Keywords
- Energy efficiency (EE)
- multipleinput multiple-output (MIMO) beamforming
- secure communication