6 results about "Relative direction" patented technology

Aspects presented herein may enable a first UE to estimate the angle-of-arrival (AoA) of a second UE. In one aspect, a first UE measures a set of phase difference of arrivals (PDoAs) for a set of radio links between the first UE and a second UE, each radio link in the set of radio links is associated with a different wavelength. The first UE determines a general function that is associated with a probability in which the second UE is at a set of relative directions or a set of relative positions compared to the first UE. The first UE estimates a relative direction or a relative position of the second UE compared to the first UE, where the relative direction is included in the set of relative directions and the relative position is included in the set of relative positions.

This provides a method for denoising seismic profiles based on an improved Laplacian filter and reverse time migration. [Solution] A method for denoising earthquake profiles based on an improved Laplacian filter and reverse time migration, comprising the steps of: collecting earthquake data and obtaining imaging results after reverse time migration processing; calculating the difference of the second derivatives of the Laplace operator in the x and z directions, displaying them in 8-neighbor second derivative form, decomposing this into four Laplacian filters including two relative directions to obtain an improved Laplacian filter; and using the improved Laplacian filter relating only to the second derivative in the z-axis direction, performing noise reduction by filtering on the imaging results after reverse time migration processing.

Aspects presented herein may enable a first UE to estimate the angle-of-arrival (AoA) of a second UE. In one aspect, a first UE measures a set of phase difference of arrivals (PDoAs) for a set of radio links between the first UE and a second UE, each radio link in the set of radio links is associated with a different wavelength. The first UE determines a general function that is associated with a probability in which the second UE is at a set of relative directions or a set of relative positions compared to the first UE. The first UE estimates a relative direction or a relative position of the second UE compared to the first UE, where the relative direction is included in the set of relative directions and the relative position is included in the set of relative positions.

A target fast determination method based on only angle measurement information, which realizes the effect of determining the relative target direction only by using low-cost angle measurement information, belongs to the technical field of satellite navigation, guidance and control. The target fast determination method comprises the following steps: step one: obtaining the angle measurement information of the relative navigation output on the satellite, and calculating the relative direction angle; step two: using the relative direction angle to calculate the conversion relationship between the offset direction coordinate system and the orbit coordinate system; step three: using the conversion relationship between the offset direction coordinate system and the orbit coordinate system to calculate the control angle used in the relative direction control. According to the relative direction angle calculated by the only angle measurement information of the navigation output on the satellite, the computer on the satellite avoids processing the distance measurement information, and the algorithm is simple.

The invention discloses an MEMS installation error self-calibration method based on dynamic response, particularly relates to the technical field of MEMS inertial sensor measurement and calibration, and is used for solving the problem of system error caused by non-ideal level of a reference plane in an existing calibration method. The method comprises the following steps: acquiring acceleration data under a plurality of fixed attitudes, calculating an actually measured projection vector, analyzing the relative direction relation of the projection vector and the deviation of theoretical geometric constraints to construct a projection deviation data set, distributing fitting weights based on the spatial distribution density of data points, extracting an actual normal vector of a reference plane through weighted plane fitting, and calculating the actual normal vector of the reference plane. And constructing a coordinate transformation matrix according to a spatial rotation relation between an actual normal vector and an ideal gravity direction to correct an installation error parameter.

This provides a method for denoising seismic profiles based on an improved Laplacian filter and reverse time migration. [Solution] A method for denoising earthquake profiles based on an improved Laplacian filter and reverse time migration, comprising the steps of: collecting earthquake data and obtaining imaging results after reverse time migration processing; calculating the difference of the second derivatives of the Laplace operator in the x and z directions, displaying them in 8-neighbor second derivative form, decomposing this into four Laplacian filters including two relative directions to obtain an improved Laplacian filter; and using the improved Laplacian filter relating only to the second derivative in the z-axis direction, performing noise reduction by filtering on the imaging results after reverse time migration processing.