Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Panasonic Automotive Systems Co., Ltd.

Panasonic Intellectual Property Corporation of America

Panasonic Holdings Corporation

Optis Wireless Technology, LLC

Other

Takaaki Kishigami

Yoichi Nakagawa

Shutai Okamura

Yutaka Murakami

Hirohito Mukai

Shozo Okasaka

Takashi Fukagawa

Masayuki Orihashi

Tadashi Morita

Makoto Hasegawa

Hidekuni Yomo

Yasuaki Yuda

Kentaro Miyano

Isamu Yoshii

Masahiro Mimura

Hirofumi Nishimura

Naoya Yosoku

Kenta Iwasa

Keiji Takakusaki

Shoji Miyamoto

Katsushi Yokozaki

Asako Hamada

Daichi Imamura

Masayuki Hoshino

Katsuaki Abe

Yoshinori Takagi

Masahiko Nakamura

Shinichiro Takabayashi

Ryosuke Shiozaki

Takafumi Tokuhiro

Yunyun Cao

Maiko Shikatani

Junji Sato

Ryohei Kimura

Hiroshi Katayama

Naoki Adachi

Hiroyuki Harada

Toshiyuki Tsumura

Youichi Nakagawa

Yoichi Yamaki

Yasunari Tanaka

Tadaaki Ushiyama

Seigo Nakao

Kiyotaka Kobayashi

Hiroshi Iwai

Atsushi Sumasu

Mitsuo Makimoto

Hiroyuki Tsuji

Morikazu Sagawa

Tomohiro Imai

Michiaki Matsuo

Noriaki Takeda

Hidenori Kayama

Yoshihito Kawai

Masanobu Kanaya

Naoya Yosuku

Yasuaki Matsushita ElIndCoLtd Yuda

A radar apparatus includes signal generation circuitry, which, in operation, generates a plurality of transmission signals transmitted at different transmission start timings, and transmission circuitry, which, in operation, applies different phase rotations to a first transmission signal and a second transmission signal among the plurality of transmission signals and transmits the first transmission signal and the second transmission signal from different transmission antennas. A transmission start timing of the second transmission signal is later than a transmission start timing of the first transmission signal. A part of the first transmission signal and a part of the second transmission signal are transmitted in a first period. A modulation frequency of the first transmission signal at a first timing included in the first period differs from a modulation frequency of the second transmission signal at the first timing.

Radar apparatus

This radar device comprises a signal generation circuit for generating a baseband signal, a code generation circuit for generating a plurality of code sequences, a phase rotation circuit for applying phase rotation based on one of the code sequences from among the plurality of code sequences to the baseband signal and generating a plurality of code multiplexed transmission signals, and a plurality of transmission antennas for transmitting the plurality of transmission signals. The code length of the plurality of code sequences is greater than the code multiplexing number of the plurality of transmission signals.

Radar device

The radar apparatus includes: a plurality of transmission antennas that transmit a transmission signal; and a transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas. A transmission delay of the transmission signal is set for a transmission period of the transmission signal. Each of the plurality of transmission antennas is associated with a combination of the Doppler shift amount and the code sequence such that at least one of the Doppler shift amount and the code sequence is different between a plurality of the combinations. A number of multiplexing by the code sequence corresponding to a first Doppler shift amount is different from a number of multiplexing by the code sequence corresponding to a second Doppler shift amount.

A radar transmitter includes: a plurality of transmission antennas that transmit a transmission signal; and a transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas. Each of the plurality of transmission antennas is associated with each of a plurality of combinations of the Doppler shift amount and the code sequence. Each of the plurality of combination is different at least one of the Doppler shift amount and the code sequence, and the Doppler shift amounts of those of the plurality of combinations which are associated respectively with at least two transmission antennas of the plurality of transmission antennas are the same Doppler shift amount, the at least two transmission antennas being a first sub-array antenna.

Provided is a radar apparatus that detects a target object with high accuracy. The radar apparatus includes: transmission circuitry, which, in operation, alternately outputs a first transmission signal with a first central frequency and a second transmission signal with a second central frequency higher than the first central frequency for each transmission period; and one or a plurality of transmission antennas, which, in operation, transmit the fast transmission signal and the second transmission signal. The second central frequency is higher than a frequency (1+1/Nc) times the first central frequency, where Nc is an integer indicating a number of times of transmission of each of the first transmission signal and the second transmission signal for the each transmission period within a predetermined duration.

A radar apparatus includes: a plurality of transmission antennas that each transmit a transmission signal; and a radar transmitter that applies a Doppler shift amount to the transmission signal transmitted from each of the plurality of transmission antennas. A plurality of the Doppler shift amounts have intervals set by unequally dividing a Doppler frequency range subject to Doppler analysis.

Provided is a radar device, wherein a transmission array antenna includes a plurality of transmission antennas that are linearly disposed in a first direction, the intervals between respective adjacent transmission antennas of the plurality of transmission antennas increase from one side toward the other side in the first direction, a reception array antenna includes a plurality of reception antennas that are linearly disposed in the first direction, and the intervals between respective adjacent transmission antennas of the plurality of reception antennas decrease from one side toward the other side.

A transmitting array antenna includes a second antenna group placed in a position inside a first antenna group in a first direction and a position different from the first antenna group in a second direction. A receiving array antenna includes a fourth antenna placed in a position outside a third antenna group arranged in the first direction and a position different from the third antenna group in the second direction. An interelement spacing between a receiving antenna of the third antenna group located at an end on a second side is identical to an interelement spacing in the first direction between a transmitting antenna of the first antenna group on the first side and each of the second antenna group. In a case where the first antenna group and the third antenna group are identical in position in the second direction, positions of antennas are different.

Radar apparatus using transmitting array antenna and receiving array

A radar transmitter transmits a radar signal through a transmitting array antenna at a predetermined transmission period, and a radar receiver receives a reflected wave signal which is the radar signal reflected by a target through a receiving array antenna. A transmitting array antenna and a receiving array antenna each include multiple subarray elements, the subarray elements in the transmitting array antenna and the receiving array antenna are linearly arranged in a first direction, each subarray element includes multiple antenna elements, the subarray element has a dimension larger than a predetermined antenna element spacing in the first direction, and an absolute value of a difference between a subarray element spacing of the transmitting array antenna and a subarray element spacing of the receiving array antenna is equal to the predetermined antenna element spacing.

This receiving array antenna includes multiple receiving antenna rows, and each of the receiving antenna rows contains a first number of antennas; of the first number of antennas contained in the receiving antenna rows, mutually adjacent antennas are arranged separated by a first interval in a first axis direction and by a second interval in a second axis direction. The transmitting array antenna includes multiple transmitting antenna rows arranged in the second axis direction at an interval that is the first number times the second interval, each of the transmitting antenna rows contains multiple antennas, and the multiple antennas contained in the transmitting antenna rows are arranged in the same position in the second axis direction and in different positions in the first axis direction. The antennas contained in the transmitting antenna rows adjacent in the second axis direction are arranged in different positions in the first axis direction.

Radar device and transmitting/receiving array antenna

A radar apparatus includes a plurality of transmit antennas that transmits a plurality of transmission signals using a multiplexing transmission, and a transmission circuit that applies phase rotation amounts corresponding to combinations of Doppler shift amounts and code sequences to the plurality of transmission signals. Each of the plurality of transmission signals is assigned a different combination among the combinations. The combinations include at least two combinations of a same number of multiplexing by the code sequences.

Reception antennas include first antennas at positions different in a first direction, second antennas at positions different in a second direction perpendicular to the first direction, and a third antenna different from the first or second antenna. The first and second antennas include one overlapping antenna. The third antenna is arranged at a position different in the second direction from a position of the first antennas. The third antenna is arranged at a position a prescribed spacing apart in the first direction from a position of the second antennas. At least one spacing of the first antennas is the prescribed spacing. Transmission antennas include fourth antennas arranged in the first direction and fifth antennas arranged in the second direction. The fourth antennas and the fifth antennas include one overlapping antenna. A spacing of the fourth antennas is wider in the first direction than an aperture length of the first antennas.

Each of the plurality of transmission antenna groups includes a plurality of transmission antennas that are disposed at second intervals in a first direction, and are disposed at fourth intervals each of which is an interval of an integral multiple of a third interval in a second direction. Each of the plurality of reception antenna groups includes a plurality of reception antennas that are disposed at fifth intervals in the first direction, and are disposed at sixth intervals each of which is an interval of an integral multiple of the third interval in the second direction. The difference between the second interval and the fifth interval is the first interval, and the difference between the fourth interval and the sixth interval is the third interval.

The target detection accuracy of a radar apparatus is improved. The radar apparatus includes signal generation circuitry, which, in operation, generates a first transmission signal and a second transmission signal, and transmission circuitry, which, in operation, transmits a multiplexed signal resulting from code-multiplexing the first transmission signal and the second transmission signal, wherein a modulation frequency of the first transmission signal at a first timing is identical to a modulation frequency of the second transmission signal at a second timing that is later than the first timing.

Growing community of inventors

Tokyo, Japan

Takaaki Kishigami