Erratum to: Distributed beamforming designs to improve physical layer security in wireless relay networks

Correction

In our paper Distributed beamforming designs to improve physical layer security in wireless relay networks[1], several equations should be corrected as indicated below.

In section 2.1 ‘Amplify-and-forward’, the equation included in the paragraph above Equation (2) incorrectly read as follows: t _i  = w _i ρ _i r _i

This equation should read correctly as follows: t _i  = w _i *ρ _i r _i

In section 2.2 ‘Decode-and-forward’, the equation included in the paragraph above Equation (4) incorrectly read as follows: t _i  = w _i s

This equation should read correctly as follows: t _i  = w _i *s

In Equations (2–5), (7–8) and (25–26), w^T is incorrectly included. In all of these equations w^T should be replaced with w^H.