The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2024
Filed:
Aug. 23, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Tatsuya Iizuka, Musashino, JP;
Fumihiko Ishiyama, Musashino, JP;
Yohei Toriumi, Musashino, JP;
Jun Kato, Musashino, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A radar apparatus of the present embodiment includes a transmitting unit that transmits a frequency chirp signal whose frequency linearly changes with time, a receiving unit that receives a reflected wave that is the frequency chirp signal reflected by an object, a mixer that mixes the transmitted frequency chirp signal and the received reflected wave to obtain a beat signal, a frequency estimation unit that estimates a frequency of the beat signal, and a distance estimation unit that estimates a distance to the object based on the frequency of the beat signal. The frequency estimation unit calculates an autoregressive coefficient of an autoregressive model from a sequence of discrete signal values of the beat signal and estimates the frequency of the beat signal using a base frequency that is based on a pole of the autoregressive model.