Open AccessDirectional modulation far‐field pattern separation synthesis approach
Author(s) -
Ding Yuan,
Fusco Vincent F.
Publication year - 2015
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2014.0331
Subject(s) - eavesdropping , transmitter , interference (communication) , separation (statistics) , power (physics) , radiation pattern , computer science , near and far field , modulation (music) , side lobe , electronic engineering
In this study, a far‐field power pattern separation approach is proposed for the synthesis of directional modulation (DM) transmitter arrays. Separation into information patterns and interference patterns is enabled by far‐field pattern null steering. Compared with other DM synthesis methods, for example, bit error rate‐driven DM optimisation and orthogonal vector injection, the approach developed in this study facilitates manipulation of artificial interference spatial distributions. With such capability more interference power can be projected into those spatial directions most vulnerable to eavesdropping, that is, the information side lobes. In such a fashion, information leaked through radiation side lobes can be effectively mitigated in a transmitter power efficient manner. Furthermore, for the first time, the authors demonstrate how multi‐beam DM transmitters can be synthesised via this approach.