Abstract
This letter proposes a compact and energy-efficient directional modulation scheme for small and power constrained devices (e.g., Internet of Things wireless sensors). The scheme uses a uniform circular array of monopole antennas, with a single radiofrequency chain and antenna active at a time. The antennas can be located in close proximity, offering significant size reduction. Furthermore, the scheme was demonstrated to operate successfully with an array of 0.6 λ diameter. The system does not generate additional artificial noise, limiting interference to other systems. Finally, the antenna switching sequence can be randomly generated and without fine-tuned synchronization with the transmitter.
| Original language | English |
|---|---|
| Pages (from-to) | 681-684 |
| Number of pages | 4 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 21 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Apr 2022 |
Keywords
- Directional modulation (DM)
- Internet of Things (IoT)
- PHY-layer security
- electrically small antennas
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