| Patent application number | Description | Published |
|---|
| 20080204306 | Detecting and ranging apparatus and detecting and ranging program product - A detecting and ranging apparatus and a program product obtain a correct relative velocity vector by a simple calculation based on a relative distance etc. obtained by a plurality of detectors such as a radar etc. by including: two relative distance measurement units receiving a reflected wave of a transmitted electromagnetic wave by an object to be detected, and thereby measuring a relative distance to the object to be detected, arranged at with each other different position; and an actual velocity vector calculation unit calculating an actual velocity vector of the object to be detected moving with an angle made in a direction from either relative distance measurement unit to the object to be detected based on the relative distances measured by the relative distance measurement units. | 08-28-2008 |
| 20080316090 | DSSS radar, method implemented by radar and computer-readable storage medium - A DSSS (Direct Sequence Spectrum Spreading) radar has a transmitting part to transmit a transmitting signal, including a predetermined code sequence, to one or a plurality of targets, a receiving part to receive a received signal corresponding to the transmitting signal which has been reflected from the one or a plurality of targets, and a computing part. The computing part computes a sum signal and a difference signal of received signals received by the receiving part at different points in time, and obtains a Doppler frequency of the one or a plurality of targets based on a phase difference between the sum signal and the difference signal. | 12-25-2008 |
| 20090079617 | DETECTION AND RANGING APPARTUS AND DETECTION AND RANGING METHOD - In a detection and ranging apparatus that performs direction-of-arrival estimation using a sensor array and that enlarges an effective aperture using a plurality of transmitting sensors, adverse effects associated with time division switching are eliminated, achieving high-accuracy measurement. A transmitter wave is spread in modulators by using mutually orthogonal codes, and the resulting transmitter waves are radiated from two transmitting sensors. Signals received by receiving sensors are each split by a splitter into two parts, which are then respectively despread in a demodulator by using the same codes as those used in the transmitter. | 03-26-2009 |
| 20090322566 | Pedestrian Support System - Disclosed is a pedestrian support system that supports the movement of a pedestrian through the use of tags. This pedestrian support system comprises: a plurality of tags having an information storage unit and that are placed on a cable that extends over a traveled path; a guide device that is held by a pedestrian that is traveling along a sidewalk and that is capable of non-contact communication with the tags, and a central control device, comprising a database in which tag map information is recorded, that uses that tag map information to creates path information having tag IDs that are in the order of tags that are located along a path from a starting location to a destination location and directly or indirectly sets that path information in the guide device. The guide device reads the tag IDs from the tags, compares the read tag IDs with the tag IDs in the path information to identify the location on the path where the pedestrian is walking, and provides information such as advancement direction to support the movement of the pedestrian. | 12-31-2009 |
| 20100156701 | DETECTION AND RANGING APPARATUS AND METHOD OF DESIGNING DETECTION AND RANGING APPARATUS - A method of designing a detection and ranging apparatus having an M number of transmitting elements and an N number of receiving elements, includes decomposing a desired polynomial equation representing an array factor of a K element sensor array into a first polynomial equation representing an array factor of an M element sensor array and a second polynomial equation representing an array factor of an N element sensor array, determining arrangement of the M number of transmitting elements based on the first polynomial equation, and determining arrangement the N number of receiving elements based on the second polynomial equation, wherein K=M×N, or K≧max(M, N). | 06-24-2010 |
| 20110050500 | METHOD OF ESTIMATING DIRECTION OF ARRIVAL AND APPARATUS THEREOF - A method includes generating a correlation vector of baseband-signal vectors based upon signals received from a plurality of sensor devices, generating a generalized Hankel matrix R representing a covariance matrix to which a spatial averaging is applied based upon the correlation vector, generating a kernel matrix Ω | 03-03-2011 |
| 20110215964 | RADAR APPARATUS AND TARGET DETECTING METHOD - Provided is a radar apparatus including an envelope detector unit that acquires an envelope component of a signal transmitted from a receiving antenna in at least one combination of a plurality of combinations of transmitting antennas and receiving antennas whose spatial phases become equal to each other in the array antenna; a determination unit that determines an amount of compensation in the at least one combination based on the envelope component acquired by the envelope detector unit; and a compensator unit that compensates a phase of a signal transmitted from each of the receiving antennas before aperture synthesis by using the amount of compensation determined by the determination unit, or compensates a phase of a signal radiated from the transmitting antenna in another combination. | 09-08-2011 |
| 20110273326 | RADAR APPARATUS - A radar apparatus includes: an array antenna having antenna elements having function of a transmission antenna and a reception antenna and receiving an echo signal which is a reflection of a probe signal from a target, the probe signal being radiated from the antenna elements; a converter for converting the echo signal to a baseband signal; a signal synthesizing unit which generates a synthesized baseband signal vector on the basis of aperture synthesis of the baseband signal generated from a combination of the antenna elements giving an equal spatial phase; a correction data acquiring unit which acquires correction data on the basis of coefficients of terms of a synthesized array polynomial; a correction processing unit which corrects the synthesized baseband signal vector on the basis of the correction data; and an estimating unit which performs angle estimation on the basis of the synthesized baseband signal vector. | 11-10-2011 |
| 20120112954 | RADAR DEVICE - The conventional ESPRIT method is accompanied by the problem of very long signal processing time. The radar device of the invention includes a signal vector-forming unit for forming signal vectors based on waves reflected from an object and received by using a plurality of receiving antennas; a submatrix-forming unit for forming submatrices based on the signal vectors; a regular matrix operation unit for calculating a regular matrix from the submatrices; an eigenvalue decomposition unit for calculating an eigenvalue of the regular matrix; and an angle calculation unit for calculating an angle at where the object is present from the eigenvalue. | 05-10-2012 |
| 20120200446 | RADAR DEVICE AND TARGET DETECTION METHOD - A radar device that detects a target includes two or more transmitting antennas and two or more receiving antennas, including a combination of two or more transmitting antennas and receiving antennas that form two or more reference paths at which spatial phases become identical; an envelope detection unit that acquires an envelope of a reception signal received by the receiving antenna in each of the reference paths; a determination unit that decides a phase correction amount between the reference paths from a delay amount that yields a minimum value of an integrated distance between envelopes of the reception signals of the reference paths; and a correction unit that aligns phases of all reception signals received by the two or more receiving antennas, using the decided phase correction amount. | 08-09-2012 |
