3results about How to "Improve angle estimation accuracy" patented technology

The invention relates to a related information enhanced two-dimensional angle estimation method based on tensor decomposition, which comprises the following steps: constructing tensor output of whole array receiving data, then obtaining a covariance tensor of the tensor output, and the covariance tensor is obtained on the whole array tensor output, so that the covariance tensor comprises cross-correlation and self-correlation information of array sub-area arrays. The method comprises the following steps: combining {1, 3} dimensions and {2, 4} dimensions of a covariance tensor to obtain a reconstructed matrix, rearranging elements in the reconstructed matrix to obtain an output matrix corresponding to a uniform array, synthesizing the matrix and a conjugate tensor of the matrix according to a third dimension to obtain a new combined tensor, performing spatial reconstruction on the combined tensor, performing tensor decomposition to obtain a combined factor of the tensor, and obtaining a final tensor. In conclusion, the method has the advantages that the spatial domain information and the time domain information of the received data are expressed in different dimensions, the angle estimation precision is improved, and the target radiation source is positioned more accurately.

The application relates to a phase increment generation method and device of a transmitting antenna and a computer device. The method comprises the following steps: acquiring a phase sequence generated by a phase shifter; selecting multiple groups of phase increment groups for all transmitting antennas according to a preset selection condition, each group of phase increment groups comprising phase increments corresponding to all transmitting antennas; determining a Fourier input sequence of each transmitting antenna in each group of phase increment groups based on the multiple groups of phase increment groups and the phase sequence; determining a noise evaluation parameter of each group of phase increment groups according to the Fourier input sequence of each transmitting antenna; and determining the phase increments of all transmitting antennas according to the noise evaluation parameters of all groups of phase increment groups. The method can improve the angle estimation accuracy of a radar.

The invention relates to the technical field of non-inductive control, in particular to a high-speed permanent magnet motor non-inductive control method and system based on fast Fourier transform, and the method comprises the following steps: obtaining the operation data of a high-speed permanent magnet motor, constructing a current pulsation state mark, extracting a main response frequency, matching a channel, collecting a response, and calculating a gain difference value; and generating a disturbance regulation and control parameter group table item. According to the method, a gradient change sequence is constructed through a stator three-phase current instantaneous peak value, an electric inertia abrupt change state is dynamically judged, the deviation trend of a channel operation state is effectively sensed, meanwhile, disturbance frequency main response is locked through Fourier transform, and a response gain difference value after current injection serves as a sensitivity reference; injection configuration and disturbance regulation and control parameters are adjusted in real time, and the rotor electrical angle estimation precision, the current control response sensitivity and the dynamic stability are improved under the condition that a sensor is lacked.