2022 Fiscal Year Final Research Report
A study on super-resolution techniques using multi-channel synchronous sampling
Project/Area Number |
20K04210
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 18020:Manufacturing and production engineering-related
|
Research Institution | Toyama Prefectural University |
Principal Investigator |
|
Co-Investigator(Kenkyū-buntansha) |
伊東 聡 富山県立大学, 工学部, 准教授 (00624818)
松本 公久 富山県立大学, 工学部, 准教授 (40457122)
|
Project Period (FY) |
2020-04-01 – 2023-03-31
|
Keywords | エイリアシング / 折返し雑音 / サンプリング定理 / 超解像度技術 / 同時サンプリング |
Outline of Final Research Achievements |
We investigated the error factors of a technique that enables the reconstruction of signals beyond the Nyquist frequency by combining multi-channel synchronous sampling data with different filter conditions, and identified three factors. Firstly, we found that significant errors occur when the frequency resolution of the Fourier transform used in the reconstruction process becomes non-integer multiples of the input signal. Secondly, we observed that the errors introduced by the filter exhibit similar tendencies for both components below the Nyquist frequency and those exceeding it when direct noise is introduced into the analog-to-digital converter. Lastly, we discovered a substantial difference between signals below the Nyquist frequency and signals exceeding it in terms of aperture time.
|
Free Research Field |
計測工学
|
Academic Significance and Societal Importance of the Research Achievements |
アナログ信号をデジタル信号に変換するA/D変換技術において,ハードウエアの技術開発には限界がある.本研究で得た知見は,ハードウエアの限界をソフトウエアによって補うための技術であって,それを実現するための礎を築くことができた.
|