In this letter we present a new approach of using time modulated phased arrays (TMPAs) to synthesize multi-carrier directional modulation (DM) symbols for physical-layer security. In particular, the modulated waveform synthesis is achieved with the careful design of the switching time sequences, instead of in digital baseband, thus, reducing the peak-to-average power ratio (PAPR) of signals going through the radio frequency (RF) chain, and only a single RF chain is required here. The operation principle and synthesis approach are elaborated and demonstrated. In addition, the efficacy of the proposed DM approach is validated via the bit error rate (BER) metric.
- Beamforming gain
- bit error rate (BER)
- directional modulation (DM)
- peak-to-average power ratio (PAPR)
- time-modulated phased array (TMPA)
ASJC Scopus subject areas
- Electrical and Electronic Engineering