Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yoshito Hirai

Kouji Okamoto

Hidekuni Yomo

Hirofumi Nishimura

Hirohito Mukai

Naoya Yosoku

Tomohiro Yui

Masakatsu Maeda

Masahiro Kumagawa

Takahiro Shima

Kouji Takahashi

Makoto Ohba

A vacant parking space detection apparatus according to the present disclosure includes a memory and a hardware processor coupled to the memory. The hardware processor is configured to: generate, for each of divided regions in a region around a vehicle, map information representing a presence probability of an object based on a detection result of a sensor for detecting an object present around the vehicle; define on the map information a plurality of first straight lines, whose intercepts differ from each other, with one or more angles to a straight advancing direction of the vehicle; and detect whether a vacant parking space is present at the angle based on a presence probability of an object assigned to the divided region belonging to each of the plurality of first straight lines.

Vacant parking space detection apparatus and vacant parking space detection method

A determination device includes: route detection circuitry which detects, a first continuous body as a first part of a one or more first direction distance information with respect to a first object, and a second continuous body as a second part of the one or more first direction distance information with respect to a second object, in a first direction along a first route on which the moving body moves, and a third continuous body as the second part, in a second direction; route determination circuitry which determines presence or absence of a second route along the third continuous body.

Route determination device, route determination method, and recording medium recording program

A road information detector acquires road information by emitting a beam via a variable directivity transmission antenna to a road sign having plural flat portions and includes a transceiver that controls the antenna to scan the beam by switching an emission angle including an azimuth angle relative to the front direction of a vehicle and receives, as reflected wave signals, waves reflected by the flat portions, a distance and reflected wave intensity detector that detects a distance between the vehicle and each of the flat portions and a reflected wave intensity of each of the reflected waves, an emission angle detector that detects the emission angle based on the reflected wave signal, and a road information analyzer that acquires the road information by generating a heat map based on the emission angles, distances, and reflected wave intensities and analyzing the heat map using a threshold value of the wave intensity.

Road information detection apparatus and road information detection method

There is provided a detection device that includes: a position estimator that estimates a candidate position of a crosswalk in a movement direction of a vehicle and estimates a length of the crosswalk and an intersecting angle between the crosswalk and a roadway using the candidate position; a corrector that corrects the numbers of periods and widths of two basis functions based on the estimated length of the crosswalk and the estimated intersecting angle, the two basis functions corresponding to intervals of white lines of the crosswalk and are orthogonal to each other; and a crosswalk detector that detects whether or not the crosswalk is present using both image data which include the candidate position and the two corrected basis functions.

Detection device and detection method

In a radar device mounted in a host vehicle, a radar transmitting unit transmits a radar signal; a light detection unit detects ON or OFF of a light of another vehicle in which the radar device is mounted; and a timing control unit sets a transmission timing of the radar signal and a light ON timing of a light of the host vehicle, the light ON timing is synchronized with the transmission timing on basis of detected ON or OFF of the light of the other vehicle. The set transmission timing is different from a transmission timing of a radar signal of the radar device mounted in the other vehicle.

Radar device and interference prevention method

Disclosed is a distortion-compensation apparatus that can reduce the storage space for storing coefficients required for distortion-compensation calculation, and can accurately execute distortion compensation. Distortion-compensation apparatus () compensates for distortion of an output signal from a predetermined circuit by predistortion in which an input signal is preliminarily multiplied by a coefficient. First multiplication section () of distortion-compensation apparatus () multiplies an input signal by a first coefficient selected from coefficient candidates in accordance with the input signal; second multiplication section (to) multiplies a delay signal of an input signal by a tap coefficient; and adding section () outputs a signal obtained by adding together an input signal multiplied by the compensation coefficient and the delay signal multiplied by the tap coefficient to the predetermined circuit.

Distortion-compensation device and distortion-compensation method

Disclosed is a distortion compensation apparatus that, by appropriately generating a distortion-compensation coefficient, makes it possible to obtain a desired transmission output, and substantially reduce the amount of power leakage to an adjacent channel. Reception section () of the distortion compensation apparatus acquires and demodulates a transmission signal to generate a demodulation signal. Delay adjustment section () computes the delay amount of the demodulation signal with respect to the baseband signal, eliminates the delay of the demodulation signal with respect to the baseband signal based on the delay amount, and outputs the baseband signal and the demodulation signal in which the delay is eliminated. Distortion compensation section () determines a distortion compensation coefficient in an adaptive digital predistortion process based on the baseband signal and the demodulation signal output by delay adjustment section (), and multiplies the input signal by the distortion compensation coefficient.

A storage unit stores a first lookup table including a plurality of correction coefficients for I codes, and stores a second lookup table including a plurality of correction coefficients for Q codes. Each of the correction coefficients for I codes and each of the correction coefficients for Q codes are complex numbers. A distortion compensation unit compensates, with one of the plurality of correction coefficients for I codes, distortion of an I code of a transmission signal to generate a first input signal, outputs the first input signal to an SCPA for I codes. The distortion compensation unit compensates, with one of the plurality of correction coefficients for Q codes, distortion of a Q code of the transmission signal to generate a second input signal, and outputs the second input signal to an SCPA for Q codes.

Transmission device and distortion compensation method

A quadrature modulator includes a first switched capacitor power amplifier that amplifies a first high-frequency signal, a second switched capacitor power amplifier that amplifies a second high-frequency signal, a first combiner which includes at least one pair of winding wires, one winding wire in one pair being disposed on a primary side to which the amplified first high-frequency signal and the amplified second high-frequency signal are separately input and the other winding wire in the one pair being disposed on a secondary side, the first combiner combining the input amplified first high-frequency signal and the input amplified second high-frequency signal to generate a quadrature modulation signal from the secondary side, a first inductor disposed between the first switched capacitor power amplifier and the primary side of the first combiner, and a second inductor disposed between the second switched capacitor power amplifier and the primary side of the first combiner.

Quadrature modulator

Until when a desired signal is received in a reception mode, a level comparator extracts a portion of a frequency-domain signal output from a Fourier transformer, the portion matching with the frequency of the desired signal, and, when the reception level of the extracted portion matching with the frequency of the desired signal is higher than a predetermined threshold value, determines that an interference signal exists. An LO frequency controller sets the frequency of a local signal (LO) based on the determination result in the level comparator such that the frequency of intermodulation distortion caused by the interference signal becomes an intermediate frequency of the frequency band of the desired signal. When it is determined that the interference signal exists, an RX controller changes gain settings of a low-noise amplifier circuit and gain settings of a variable gain amplifier circuit and changes the cutoff frequency of a filter circuit.

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Kanagawa, Japan

Yoshito Hirai