Title:
SIGNAL ANALYSIS DEVICE, CONTROL CIRCUIT, STORAGE MEDIUM, AND SIGNAL ANALYSIS METHOD
Document Type and Number:
WIPO Patent Application WO/2024/052962
Kind Code:
A1
Abstract:
A signal analysis device (100) comprises: a transmission unit (113) that modulates a plurality of synchronized chirp signals and transmits the modulated signals from a plurality of transmitting antennas (106) to an observation area (107); a reception unit (114) that receives the signals transmitted from the transmission unit (113) via the observation area (107) using a plurality of receiving antennas (108), generates a plurality of baseband signals by mixing the received signals with the chirp signals, and converts the plurality of baseband signals from analog signals to digital signals; and a reception processing unit (111) that converts the plurality of baseband signals converted to digital signals from time-domain values to frequency-domain values, converts the plurality of frequency-domain values to fewer values than the plurality of frequency-domain values by grouping the frequency-domain values using a specified frequency range as a unit, estimates a rough reflectance distribution in the observation area (107) using the fewer values, sets the rough reflectance distribution as an initial value for an iterative estimation process, and estimates a reflectance distribution more accurate than the rough reflectance distribution.
Inventors:
AKIYAMA YUJI (JP)
Application Number:
PCT/JP2022/033281
Publication Date:
March 14, 2024
Filing Date:
September 05, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01S13/89; G01S7/41; G01S13/86
Domestic Patent References:
| WO2020208627A1 | 2020-10-15 |
Foreign References:
| JP2016507718A | 2016-03-10 | |||
| US20190179007A1 | 2019-06-13 | |||
| JP2011149805A | 2011-08-04 | |||
| US20210041555A1 | 2021-02-11 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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