Building the Generalized Astronomical Channel Model Using Digital Signal Processing

• Main Authors: Hsieh,Ping-Hsun, 謝秉勳
• Other Authors: Shiung,David
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/p572jk

碩士 === 國立彰化師範大學 === 電信工程學研究所 === 107 === In this thesis, we extend the application of digital signal processing to the field of astronomical observation. We combine wireless communication with digital signal processing and try to solve a long-standing problem in the astronomy society - overcoming the effects of atmospheric turbulence on the resolution of astronomical observations. Before discussing this issue, we review the differences between remote sensing and astronomical observations. Some prior arts are also reviewed, e.g., the effects of atmospheric turbulence on astronomical observations, the causes of atmospheric turbulence, and the estimate of astronomical seeing. We also highlight some other reasons that cause blurred astronomical images. A generalized wireless communication model for astronomical observations is proposed. This is a linear channel model with time-varying coefficients for modeling the intrinsic nature of atmospheric turbulence. This model paves the way for disassembling a blurred star into a set of basis functions, which is the first step to equalize the astronomical channel.