5.2 A 28GHz Frequency-Diverse Sub-Array TX with Secret Phase Keys and Antenna Subset Modulation for Eavesdropping-Resilient Wireless Communication
Abstract
Prior works on physical-layer eavesdropping protection only addressed off-axis Eve. This paper presents the first TX to defend against both main-beam and off-axis Eves. Incorporating three key components: frequency-diverse sub-arrays, secret phase keys, and antenna subset modulation, the 28 GHz TX demonstrates highly scrambled constellations for all Eves, while the legitimate RX's reception remains intact ($\sim 6 \% \text{EVM}_{\text {rms }}$), with only 2% DC power overhead compared to a standard phased-array TX.
Fields of Study & Subjects
Wireless Communication Security Techniques
Radar Systems and Signal Processing
Wireless Signal Modulation Classification
Publication details
- Journal / source
- Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference
- Pages
- 92–94
- Publication date
- 15 February 2026
- Language
- EN