A Secure Method of Physical Layer Transmission Based on Multi-beam and Artificial Noise
Maozhong Song · Telecommunication Engineering · 2011
A secure method based on multi-beam and artificial noise is proposed to guarantee the information un-eavesdropped during the physical layer transmitting.Transmitter sends the signal bearing information and two artificial noise signals simultaneously.Each signal is multiplied by a group of weighting coefficients,which is generated through adapative beamforming technique,to enable that the main lobe of antenna pattern of the signal bearing information directs expected position while the antenna patterns of artificial noises form nulls at the same position.Simulation results show that the desired receiver can demodulate the information effectively while the performance deteriorates obviously when the azimuth deviates off the desired receiver.