Abstract: A disclosed power level measuring device includes a power calculator for calculating power values based on correlation values between a received signal and known signals, for each of sampling times within a predetermined period; a time divider for switching connection of input signals, responding to time slots allocated to each of plural cells; an accumulator connected to the time divider, for accumulating the power values; a detector for detecting at least one sampling time whose accumulated value is greater than a threshold; a memory connected to the time divider, for storing the power values; and an outputting unit for outputting a measured power level, based on the stored power value corresponding to the detected sampling time.

Abstract: A disclosed power level measuring device includes a power calculator for calculating power values based on correlation values between a received signal and known signals, for each of sampling times within a predetermined period; a time divider for switching connection of input signals, responding to time slots allocated to each of plural cells; an accumulator connected to the time divider, for accumulating the power values; a detector for detecting at least one sampling time whose accumulated value is greater than a threshold; a memory connected to the time divider, for storing the power values; and an outputting unit for outputting a measured power level, based on the stored power value corresponding to the detected sampling time.

Abstract: An image synthesis system comprises a volume memory for accumulating entire volume data after being divided into cubic data comprising units each of which is composed of eight pieces of volume data for constructing a small cube to make it possible to perform memory operation by using the units of the cubic data; an image processing unit including a memory control unit, an inclination calculation unit, a brightness calculation unit, a synthesis calculation unit, and a coordinate conversion unit; an image display memory; and a display unit. The volume data is read from the volume memory by using the units each of which is composed of eight voxels for constructing the small cube. The inclination calculation is performed by the inclination calculation unit, the brightness is calculated by the brightness calculation unit, and the synthesis calculation unit is used to perform the synthesis calculation for the entire volume data along voxels through which an arbitrarily set imaginary line of sight passes.

Abstract: Disclosed is a three-dimensional radar apparatus comprising a radar transmitting/receiving unit, a three-dimensional polygon-generating unit, and a three-dimensional graphics unit, wherein a radar transmitter/receiver outputs signals concerning orientation information, distance information, and reception intensity information on the basis of a radio wave reflected from a target, and a scan converter is used to convert the signals concerning the orientation information, the distance information, and the reception intensity information into two-dimensional radar image data composed of two-dimensional rectangular coordinates and brightness information of each of picture elements. The two-dimensional radar image data is also inputted into the three-dimensional polygon-generating unit to perform polygon-generating processing on the basis of the two-dimensional rectangular coordinates and the brightness information of each of the picture elements.

Abstract: Ray casting method is performed using a hardware. Ray casting is performed on a 3D object formed in a three-dimensional array of voxels, luminance information is generated for each unit ray path based on voxel information assigned to the voxels on the ray path, and an image related to the 3D object are generated based on the luminance information. At this time, pattern information representing a pattern of the ray paths is previously stored in a branch point table memory. A memory control section determines ray paths for generating the luminance information based on the pattern information.