For phase-aligned secure precise wireless transmission, optimizing the antenna amplitude weights with a leakage criterion or with a maximum-receive-power plus null-steering criterion gives lower bit-error rate and higher secrecy rate than equal amplitude beamforming in simulations.
Artifici al-noise- aided secure transmission with directional modulation bas ed on random frequency diverse arrays,
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Two High-Performance Amplitude Beamforming Schemes for Secure Precise Communication and Jamming with Phase Alignment
For phase-aligned secure precise wireless transmission, optimizing the antenna amplitude weights with a leakage criterion or with a maximum-receive-power plus null-steering criterion gives lower bit-error rate and higher secrecy rate than equal amplitude beamforming in simulations.