3 results about "Rotational wave" patented technology

The application discloses a kind of vector light field polarization state transient solution methods based on convolutional neural network, specific steps are as follows: construct the CNN for vector light field polarization state transient solution;Rotating wave plate experimental system is built, and the data set required for CNN training is obtained using rotating wave plate experimental system and CNN is trained;After improving rotating wave plate experimental system, vector light field polarization state transient solution system is obtained, using the system to obtain the light intensity diagram of transient vector light field, the light intensity diagram of modulated transient vector light field, and the polarization direction and ellipticity of the corresponding position of the output obtained from the light intensity diagram of transient vector light field are input into the CNN of training completion, to reconstruct vector light field vector light field polarization state.The application can high-precision instantaneous solve vector light field polarization state from vector light field light intensity diagram and modulated vector light field light intensity diagram, without rotating wave plate multiple times, with higher measurement efficiency and measurement accuracy, and has wide application prospect in the field of large bandwidth laser communication.

The application provides a rotating beam physical layer security transmission system and method based on a multi-frequency phased array, relates to the technical field of wireless communication physical layer security, and aims to solve the eavesdropping risk caused by the fixed main lobe direction of the traditional directional beam forming technology.The application realizes the rotation of the beam around the target user by introducing a frequency offset increment in the multi-frequency phased array, combines a randomization technology of random reverse side lobes, designs an adaptive control algorithm for the eavesdroppers with known positions and unknown positions respectively, makes the target user keep a stable signal-to-noise ratio, and significantly reduces the signal-to-noise ratio of the eavesdroppers.The application effectively solves the interception and cracking problem caused by the broadcast characteristics of wireless signals, greatly improves the reliability and anti-eavesdropping ability of the physical layer security transmission, and is suitable for high-speed wireless communication scenes such as millimeter waves.