Title:
FREQUENCY CALCULATION DEVICE AND RADAR APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/154747
Kind Code:
A1
Abstract:
A conventional frequency calculation device has the problem of deterioration in real time performance because, due to change of a chirp signal period, the frequency calculating device takes a certain time to detect the distance from a target and a relative speed. The frequency calculation device according to the present invention is provided with: a harmonic generation circuit that generates harmonics of an input signal; a filter that allows, among signals outputted from the harmonic generation circuit, the harmonics to pass therethrough; an A/D converter that samples a signal outputted from the filter and converts the sampled signal into a digital signal; a frequency detection circuit that detects the frequency of the digital signal outputted from the A/D converter; and a frequency calculation circuit that calculates the frequency of the input signal by using the frequency of the harmonics detected by the frequency detection circuit.
Inventors:
SHIMOKAWATOKO JUN (JP)
MIZUTANI HIROYUKI (JP)
TAJIMA KENICHI (JP)
OTSUKA HIROSHI (JP)
MIZUTANI HIROYUKI (JP)
TAJIMA KENICHI (JP)
OTSUKA HIROSHI (JP)
Application Number:
PCT/JP2017/007331
Publication Date:
August 30, 2018
Filing Date:
February 27, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01R23/16; G01R23/165; G01S13/34
Foreign References:
| JPH0915273A | 1997-01-17 | |||
| JP2012100117A | 2012-05-24 | |||
| JP2009162662A | 2009-07-23 | |||
| JP2014081352A | 2014-05-08 | |||
| JPH09133765A | 1997-05-20 | |||
| JPH10242933A | 1998-09-11 | |||
| JPH04357468A | 1992-12-10 | |||
| US20150032447A1 | 2015-01-29 |
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
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