Abstract: A radar device is provided. The radar device is installed in a movable body, transmits electromagnetic waves at a predetermined frequency, and receives response waves transmitted from a transponder device in response to the electromagnetic waves, respectively. The radar device includes a representative distance calculating module for calculating a representative distance from the radar device to the transponder device based on the response waves that are continuous over a predetermined azimuth angle range, a representative relative azimuth calculating module for calculating a representative relative azimuth of the transponder device from the radar device based on the continuous response waves, and a positioning module for calculating a location of the radar device based on positional information of the transponder device that is contained in each of the response waves, the calculated representative distance, and the calculated representative relative azimuth.

Abstract: To achieve an unnecessary signal identifying device that can accurately identify an unnecessary signal from a reception signal. Correlators 321-32n correlation process the reception signal and a replica code at every predetermined timing, and output correlation data. Each of Buffers 331-33n stores a predetermined sampling number of the correlation data along a code phase axis, and output them to FFT processors 341-34n and a identifier 35. Each of the FFT processors 341-34n FFT processes the predetermined sampling number of the correlation data to acquire a frequency spectrum, and output it to the identifier 35. From a correlation data series on the code phase axis and the frequency spectrum, the identifier 35 acquires a property of the correlation data for a two-dimensional range of the code phase axis and a frequency axis, and identifies the signal with the property coinciding matching with characteristics of the unnecessary signal as the unnecessary signal.

Abstract: This disclosure provides a device, which includes a transceiver for outputting a reception signal according to an echo intensity of a transmission signal, a reception signal monitoring module for monitoring an intensity of the reception signal based on a saturation condition, and a transmitting condition setting module for controlling a transmitting power according to the intensity of the reception signal monitored by the reception signal monitoring module.

Abstract: A power combiner/distributor including first, second, and third waveguides connected with each other in a planar shape, and for either one of distributing power inputted from the first waveguide to the second and third waveguides and combining powers inputted from the second and third waveguides to input the combined power to the first waveguide is provided. The power combiner/distributor includes a branch circuit connected with the first waveguide and for branching a transmission path formed in the first waveguide into first and second transmission paths, and decoupling circuits connected with the branch circuit and also to the second and third waveguides, respectively, the decoupling circuits having a power losing resonator coupled to the second and third waveguides, resonating within an operation frequency band, and causing a power loss.

Abstract: A signal processing device, which includes an echo signal input module for inputting echo signals from an antenna discharging electromagnetic waves to a predetermined area and receiving the echo signals reflected on a target object, an echo signal level detection module for detecting a level of each of the echo signals from each location within the predetermined area, a target object detection module for detecting the target object based on the levels of the echo signals, a correlation processing module for performing scan-to-scan correlation processing of a plurality of scans, and a level adjustment module for adjusting the levels of the echo signals after the scan-to-scan correlation processing. The level adjustment module adjusts the levels of the echo signals corresponding to the locations where the target object detection module detects the target object.

Abstract: There is provided a radar receiver that effectively prevents local oscillator signals from leaking out from an antenna. A receiver 21 includes a local oscillator 5, a mixer 6, a buffer amplifier 11, and a mode switcher 16. The local oscillator 5 outputs a local oscillation signal LO. The mixer 6 mixes a high-frequency signal RF received by a radar antenna 2 with the local oscillation signal LO. The buffer amplifier 11 is disposed between the local oscillator 5 and the mixer 6. The mode switcher 16 switches at least between a standby mode in which power is supplied to the local oscillator 5 and no power is supplied to the buffer amplifier 11 and a reception mode in which power is supplied to both the local oscillator 5 and the buffer amplifier 11.

Abstract: This disclosure provides a tracking information control device. The device includes a receiver for receiving, from two radar devices, data relating to a target echo received by a radar antenna of one of the radar devices, and data relating to a target echo received by a radar antenna of the other radar device, the data being obtained from tracking the target echoes, respectively, a determiner for determining whether the target echoes indicate the same target object, an ID applier for applying the same ID to the target echoes when the determiner determines that the target echoes indicate the same target object, and a transmitter for transmitting the same IDs to the radar devices in order to inform whether the target echoes displayed by the radar devices, respectively, indicate the same target object.

Abstract: This disclosure provides an information display device. The information display device includes an acquirer for acquiring positional information on one or more display targets including at least one of a landmark serving as a reference mark used when a movable body is in move, another movable body, and a location registered by an operator, and a controller for displaying positional information and circumferential information on the movable body in an information display area, associating at least one of the one or more display targets of which a position is outside the information display area with a direction to which the at least one of the one or more display targets is located centering on the movable body, and displaying the at least one of the one or more display targets in an outer circumferential area of the information display area.

Abstract: An information display device includes a preset course information receiver, a symbol display processor, a change mode execution processor, and a preset course information transmitter. The preset course information receiver receives preset course information from an automatic steering device. The symbol display processor displays a symbol representing a preset course on a display screen to correspond to position information of a mobile body based on the preset course information. The change mode execution processor executes a change mode for changing the preset course information based on a fact that the symbol has been designated with a manipulation component. The preset course information transmitter transmits the preset course information changed during the change mode to the automatic steering device.

Abstract: Provided is a timing signal supply device that can frequently perform a phase comparison on a side of receiving a supply of a timing signal and flexibly achieve various operation modes. A GPS receiver 11 includes a baseband processing module 16 and a PN code output terminal 26. The baseband processing module 16 performs a positioning calculation based on positioning signals received from GPS satellites. The PN code output terminal 26 is configured so as to be able to output, based on the result of the positioning calculation by the baseband processing module 16, a PN code that is repeated every second in synchronization with the coordinated universal time.

Abstract: An RF pulse signal generation switching circuit for controlling an output of a power FET for amplifying a high frequency signal to generate an RF pulse signal that is the high frequency signal pulse formed into a pulse-wave shape is provided. The circuit includes first and third n-type FETs of which gates are inputted with a control pulse that supplies a rise timing and a fall timing of a pulse, and a second n-type FET of which a gate is connected with a drain of the first FET. A source of the first FET and a source of the third FET are grounded, respectively. The drain of the first FET is applied with a first drive voltage via a resistor. A drain of the second FET is applied with a second drive voltage. A source of the second FET is connected with a drain of the third FET and the connection point therebetween is connected with the power FET. A capacitor is connected between the connection point and an end of the resistor from which the first drive voltage is applied.

Abstract: A radar system is provided. The system includes a radar transceiving device equipped in a movable body and for transmitting an electromagnetic wave at a first frequency, and a transponder device arranged in a beacon and for transmitting a response wave upon receiving the electromagnetic wave. The transponder device includes a response wave transmitting module for transmitting, when a radar classification of the radar transceiving device is a solid-state radar, a response wave at a second frequency different from the first frequency in response to receiving the transmitted electromagnetic wave. The radar transceiving device includes a transmitting module for transmitting the electromagnetic wave, a receiving module for receiving a radar echo at the first frequency and the response wave at the second frequency, and a display controlling module for displaying, on a predetermined radar display unit, locations of the beacon and another movable body existing around the movable body.

Abstract: Accurate long term satellite models for satellites include satellites of different navigation systems. Such a model is derived for a non-GPS satellite that broadcasts native orbital model data specified as valid within a first time period. Initial position and velocity data are determined from the native orbital model data, and orbit integration is performed to determine an orbital arc in an earth-centered-earth-fixed frame over a second time period longer than the first time period. Initial estimates of GPS or GPS-like orbit parameters are determined for the non-GPS satellite, and the orbital arc and the initial estimates of the GPS or GPS-like orbit parameters are input to an orbit parameter solver that determines GPS or GPS-like parameters that fit the orbital arc and is used to determine final orbital model parameters in GPS or GPS-like format for the non-GPS satellite.

Abstract: This disclosure provides a slot antenna, which includes a tubular electromagnetic wave radiation part having a hollow space, a plurality of electromagnetic wave radiating slots for radiating electromagnetic waves being formed in at least a part of a side surface of the radiation part and a plurality of feeding slots for being inputted with the electromagnetic waves being arrayed in line in another part of the side surface opposing to the radiating slots, a feeding part having a hollow space, extending along the feeding slot array, and for feeding power from the outside of the radiation part to the feeding slots, and a power guiding part having a hollow space and for guiding the power to the feeding part, the power guiding part extending in a direction orthogonal to the array direction of the feeding slots and in parallel to the center axis of the radiation part, from a location of the feeding part corresponding to at least one of the feeding slots.

Abstract: This disclosure provides an echo image display device, which includes an antenna for discharging electromagnetic waves and receiving echo signals reflected on one or more target objects, an echo signal input unit for inputting the echo signals from the antenna, an echo signal level detector for detecting a level of each of the echo signals with reference to a distance and an azimuth from the antenna, an image data generating module for generating image data based on the levels of the echo signals, a display unit for displaying the image data, and a data amount changing module for changing a data amount rate of a predetermined area that is set as a part of a display area of the display unit, into a different rate in another part of the display area.

Abstract: This disclosure provides a radar apparatus, which includes an antenna for discharging a transmission beam with frequencies corresponding to elevation/depression angles with respect to a particular surface and receiving a reflection echo from a reflective body and a reception module for detecting an elevation/depression angle of the reflective body based on a frequency component of a reception signal received by the antenna and detecting a distance of the reflective body based on a time component of the reception signal.

Abstract: A pseudo range is corrected with high accuracy using a pseudo range correction method that incorporates carrier smoothing. A code pseudo range correction unit (19) performs carrier smoothing of an L1 code pseudo range (PRL1(i)) by the temporal change (?ADRL1(i)) in an L1 carrier phase, and performs carrier correction of a code ionosphere delay (IPRL1(i)) by the temporal change (?IADRL1(i)) in a carrier ionosphere delay. The code pseudo range correction unit (19) performs ionosphere delay correction by subtracting the corrected ionosphere delay (I?L1sm(i)) from the L1 code pseudo range (PRL1sm(i)) after smoothing processing. At this time, a direction of the delay in the temporal change (?IADRL1(i)) in the carrier ionosphere delay included in the temporal change (?ADRL1(i)) in the L1 carrier phase is matched with a direction of the delay in the temporal change (?IADRL1(i)) in the carrier ionosphere delay used to calculate the corrected ionosphere delay (I?L1sm(i)).

Abstract: There is provided a configuration in an access point managed by a management device for dealing with a situation in which management by the management device is no longer possible. An access point 3 includes a controller 30 that controls the operation of the access point 3, and a management status detector 32 that detects the management status by a management device 2. The controller 30 changes the operation of the access point 3 by validating or invalidating an SSID according to the detecting result of the management status.

Abstract: A radar apparatus is provided. The radar apparatus includes a transmitter configured to transmit radar signals via a radar antenna, a receiver configured to receive reflection waves that are echoes of the radar signals, via the radar antenna, a radar image generating module configured to generate a radar image based on the reflection waves received by the receiver, a performance monitor configured to measure performance of at least one of the transmitter and the receiver, and a controller configured to cause the performance monitor to perform the measurement while the transmission of the radar signals is suspended.

Abstract: There is provided an automatic steering device with which an optimal duty ratio for achieving an optimal rudder turning speed at a cruising speed can be found simply and accurately. An automatic steering device 10 includes a correspondence acquisition component 24 and a duty ratio calculator 25. The correspondence acquisition component 24 finds a correspondence between a duty ratio and a rudder turning speed based on a first rudder turning speed while a steering mechanism 11 is controlled at a first duty ratio, and a second rudder turning speed while the steering mechanism 11 is controlled at a second duty ratio. The duty ratio calculator 25 calculates the duty ratio corresponding to a specific rudder turning speed based on the correspondence found by the correspondence acquisition component 24.