Abstract: 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.

Abstract: 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.

Abstract: 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).

Abstract: A direction-of-arrival estimation apparatus has a signal vector generation unit operable to generate a signal vector v composed of N baseband signals v1 to vN from arriving signals received from a target by N sensors. The direction-of-arrival estimation apparatus includes a Hankel matrix generation unit operable to preferentially set an order of a column of a matrix at a natural number M where 1?M and M?(N?1)/2 and generate an (N?M)×M matrix Rf1, Rf2, Rb1, or Rb2 from elements v1 to vN-1 of the signal vector. The direction-of-arrival estimation apparatus also includes an estimation unit operable to generate a matrix R using the matrices Rf1, Rf2, Rb1, or Rb2, divide the matrix R into two submatrices R1 and R2 by R=[R1|R2]T, and estimate a direction of arrival of the arriving signal based on the submatrices R1 and R2.

Abstract: 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 ?1, which is a projection matrix onto noise subspace, by performing linear operation using submatrices R1 and R2 of the generalized Hankel matrix R, generating a kernel matrix ?2, which is orthogonal with the kernel matrix ?1, and estimating a direction of arrival of a signal based upon the kernel matrices ?1 and ?2.

Abstract: 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.

Abstract: An arriving direction estimating device for estimating the arriving direction of an arriving wave with high accuracy and at high speed by using a sensor array. The arriving direction estimating device comprises a receiving section for generating a baseband signal from the arriving signals received by sensors, a matrix creating section for creating a spatial average covariance matrix R by combining the correlation vector of the baseband signal, a projection matrix creating section for creating a projection matrix Q from the matrix R depending on the number of signals of the arriving signals, a scale matrix creating section for creating a scale matrix S from a partial matrix of the matrix R, and an estimating section for estimating the arriving direction of the arriving wave from the angle distribution or an algebraic equation by using QS?1QH defined using the projection matrix Q and the scale matrix S.

Abstract: 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.

Abstract: A pseudo-spatial-average-covariance-matrix generating unit selects, from matrixes Rf1, Rf2, Rb1 and Rb2, one appropriate matrix or two or more appropriate matrixes for combination to generate a pseudo-spatial-average-covariance matrix R. A pseudo-spatial-average-covariance-matrix Hermitian-conjugate product generating unit generates a target-count-estimation matrix RRH. A target-count-estimation-matrix decomposing unit performs LU decomposition on RRH into a lower triangular matrix L and an upper triangular matrix U. An index generating unit generates an index using elements of the upper triangular matrix U. An index-parameter scanning unit estimates a target count by using the index generated by the index generating unit.

Abstract: 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).

Abstract: 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.

Abstract: A target detection apparatus that includes a transmission/reception device for generating a transmission signal for detection of a target, and extracting distance information about the target from a received signal; a number of sensors each of which transmits the transmission signal to respective different angle ranges, receives a signal reflected by the target, and transfers the received signal to the transmission/reception device; and a switch device for switching in a time division manner a connection between the transmission/reception device and one of the sensors to a connection between the transmission/reception device and another one of the sensors, where the switch device selects a first of the sensors for transmitting the transmission signal in a time slot and a second of the sensors for receiving the signal reflected by the target in the time slot.

Abstract: An incoming direction estimation apparatus estimates an incoming direction of a radar wave using three or more sensors or antennas simultaneously. An arithmetic expression for estimating an incoming direction of a radar wave is configured as sin?1((1/2?a)*tan?1b). The “a” is d/? determined by an antenna interval and by a wavelength ? of a carrier, or such, carrying the radar wave. A simultaneous use of three antennas makes it possible to set the a as a value depending on a value d0=a0? based on the interval between first antennas and value d1=a1? based on the interval between second antennas. Therefore, if a wide field of vision of an incoming direction is needed, it is only necessary to adjust (d1?d0)/?=(a1?a0), in place of the absolute interval of antennas a=d/?, thereby making it possible to lessen a limitation on the design of antennas and set a field of vision of the incoming direction appropriately.

Abstract: 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.

Abstract: Provide an on-vehicle radar device that performs transmission control of a monitoring signal, following fixed rules, so that interference with other radar devices can be avoided with certainty. An on-vehicle radar device comprises a transceiver which transmits/receives a monitoring signal at a specified frequency band and transmits a priority order signal at a frequency within the above-mentioned frequency band, and a controller which switches the signals transmitted by the transceiver. The transceiver receives a priority order signal of another radar device, and when interference with the signal of the other radar device is detected, the controller, based on the priority order of that other device and on the priority order of the device itself, shifts, by a specified frequency amount, the frequency band of the monitoring signal transmitted by the transceiver.

Abstract: A direction-of-arrival estimation apparatus has a signal vector generation unit operable to generate a signal vector v composed of N baseband signals v1 to vn from arriving signals received from a target by N sensors. The direction-of-arrival estimation apparatus includes a Hankel matrix generation unit operable to preferentially set an order of a column of a matrix at a natural number M where 1?M and M?(N?1)/2 and generate an (N?M)×M matrix Rf1, Rf2, Rb1, or Rb2 from elements v1 to VN?1 of the signal vector. The direction-of-arrival estimation apparatus also includes an estimation unit operable to generate a matrix R using the matrices Rf1, Rf2, Rb1, or Rb2, divide the matrix R into two submatrices R1 and R2 by R=[R1|R2]T, and estimate a direction of arrival of the arriving signal based on the submatrices R1 and R2.

Abstract: A pseudo-spatial-average-covariance-matrix generating unit selects, from matrixes Rf1, Rf2, Rb1 and Rb2, one appropriate matrix or two or more appropriate matrixes for combination to generate a pseudo-spatial-average-covariance matrix R. A pseudo-spatial-average-covariance-matrix Hermitian-conjugate product generating unit generates a target-count-estimation matrix RRH. A target-count-estimation-matrix decomposing unit performs LU decomposition on RRH into a lower triangular matrix L and an upper triangular matrix U. An index generating unit generates an index using elements of the upper triangular matrix U. An index-parameter scanning unit estimates a target count by using the index generated by the index generating unit.

Abstract: 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.

Abstract: An on-vehicle radar device has a transmission section for transmitting a radio wave to an object, a receive section for receiving the radio wave reflected by the object, and a processing section for dividing an object detection range into three or more of a plurality of areas, setting a threshold of an intensity of the radio wave received for each of the plurality of areas, and judging the existence of an object by comparing the intensity of the radio wave and the threshold. This processing section sets, based on an auto-cruise control mode or pre-crash mode of the vehicle, a threshold of a part of an area in the object detection range to be lower than the threshold of the other areas, or changes the threshold of the detection area according to the object detection status.

Abstract: A radar device has a long range radar sensor having a first transmission and receiving section for transmitting and receiving radio wave to a first detection range and a first signal processing section for detecting an object existing in the first detection range; a short range radar sensor having a second transmission and receiving section for transmitting and receiving a radio wave to a second detection range of which width is wider and of which distance is shorter than the first detection range and a second signal processing section for detecting an object existing in the second detection range; and a processing section for integrating information supplied from the first and second signal processing sections. And one of the long range radar sensor and the short range radar sensor stops a detection operation of the object to an overlapped range of both the detection ranges.