https://projectswiki.eleceng.adelaide.edu.au/projects/api.php?action=feedcontributions&feedformat=atom&user=A1714504Projects - User contributions [en]2026-06-14T20:14:48ZUser contributionsMediaWiki 1.31.4https://projectswiki.eleceng.adelaide.edu.au/projects/index.php?title=Projects:2018s1-177_Radio_astronomy_with_software-defined_radio&diff=10586Projects:2018s1-177 Radio astronomy with software-defined radio2018-08-17T04:49:53Z<p>A1714504: </p>
<hr />
<div><br />
== Project name ==<br />
Radio astronomy with software-defined radio<br />
<br />
<br />
== Project introduction ==<br />
'''Background'''<br />
<br />
Due to the atomic transition of electrons, the "spin-flip" line of hydrogen emits from the universe. The frequency of these hydrogen lines is 1420. 406 MHz and they were firstly discovered by Ewen and Purcell in 1951. In recent years, as the emergence of SDR --- a new and relatively inexpensive device, amateurs can re-explore the spectrum of the hydrogen line with a small budget.<br />
<br />
<br />
'''System overview'''<br />
<br />
This project aims to design and build up a system to observe the spectrum of hydrogen line from the universe. The system consists of three parts --- antenna, radio frequency (RF) and signal processing, and it has been built by last year's students.<br />
<br />
<br />
'''Motivation'''<br />
<br />
This is a follow-up project. The experiment results from last year have some drawbacks that need to be improved in this year. Four major drawbacks are listed as follows.<br />
1) Spurs exist in the power spectrum density plots.<br />
2) Weak signals could be swamped.<br />
3) The resolution is not high enough.<br />
4) The system cannot process data in real time.<br />
<br />
<br />
'''Objectives'''<br />
<br />
According to the limitations of last year's project, the objective of this year's project is to improve the performance of the system which has been built by the students in last year. The main goals include using a better algorithm to improve signal resolution, reducing the effects of radio interference and processing data in real time.<br />
<br />
<br />
== Team members ==<br />
Hongwen Qu,<br />
Hanwen Chang<br />
<br />
<br />
== Supervisors ==<br />
Dr Withawat Withayachumnankul,<br />
Dr Brian Ng</div>A1714504https://projectswiki.eleceng.adelaide.edu.au/projects/index.php?title=Projects:2018s1-177_Radio_astronomy_with_software-defined_radio&diff=10585Projects:2018s1-177 Radio astronomy with software-defined radio2018-08-17T04:46:47Z<p>A1714504: </p>
<hr />
<div><br />
== Project name ==<br />
Radio astronomy with software-defined radio<br />
<br />
== Project introduction ==<br />
'''Background'''<br />
<br />
Due to the atomic transition of electrons, the "spin-flip" line of hydrogen emits from the universe. The frequency of these hydrogen lines is 1420. 406 MHz and they were firstly discovered by Ewen and Purcell in 1951. In recent years, as the emergence of SDR --- a new and relatively inexpensive device, amateurs can re-explore the spectrum of the hydrogen line with a small budget.<br />
<br />
<br />
'''System overview'''<br />
<br />
This project aims to design and build up a system to observe the spectrum of hydrogen line from the universe. The system consists of three parts --- antenna, radio frequency (RF) and signal processing, and it has been built by last year's students. The system diagram is shown in the figure below.<br />
[[File:wiki_system diagram.jpg]]<br />
<br />
'''Motivation'''<br />
<br />
This is a follow-up project. The experiment results from last year have some drawbacks that need to be improved in this year. Four major drawbacks are listed as follows.<br />
1) Spurs exist in the power spectrum density plots.<br />
2) Weak signals could be swamped.<br />
3) The resolution is not high enough.<br />
4) The system cannot process data in real time.<br />
<br />
<br />
'''Objectives'''<br />
<br />
According to the limitations of last year's project, the objective of this year's project is to improve the performance of the system which has been built by the students in last year. The main goals include using a better algorithm to improve signal resolution, reducing the effects of radio interference and processing data in real time.<br />
<br />
== Team members ==<br />
Hongwen Qu,<br />
Hanwen Chang<br />
<br />
== Supervisors ==<br />
Dr Withawat Withayachumnankul,<br />
Dr Brian Ng</div>A1714504https://projectswiki.eleceng.adelaide.edu.au/projects/index.php?title=File:Wiki_system_diagram.PNG&diff=10584File:Wiki system diagram.PNG2018-08-17T04:42:02Z<p>A1714504: </p>
<hr />
<div></div>A1714504https://projectswiki.eleceng.adelaide.edu.au/projects/index.php?title=Projects:2018s1-177_Radio_astronomy_with_software-defined_radio&diff=10583Projects:2018s1-177 Radio astronomy with software-defined radio2018-08-17T04:39:00Z<p>A1714504: </p>
<hr />
<div><br />
== Project name ==<br />
Radio astronomy with software-defined radio<br />
<br />
== Project introduction ==<br />
'''Background'''<br />
Due to the atomic transition of electrons, the "spin-flip" line of hydrogen emits from the universe. The frequency of these hydrogen lines is 1420. 406 MHz and they were firstly discovered by Ewen and Purcell in 1951. In recent years, as the emergence of SDR --- a new and relatively inexpensive device, amateurs can re-explore the spectrum of the hydrogen line with a small budget.<br />
<br />
'''System overview'''<br />
This project aims to design and build up a system to observe the spectrum of hydrogen line from the universe. The system consists of three parts --- antenna, radio frequency (RF) and signal processing, and it has been built by last year's students. The system diagram is shown in the figure below.<br />
[[File:Example.jpg]]<br />
<br />
'''Motivation'''<br />
This is a follow-up project. The experiment results from last year have some drawbacks that need to be improved in this year. Four major drawbacks are listed as follows.<br />
1) Spurs exist in the power spectrum density plots.<br />
2) Weak signals could be swamped.<br />
3) The resolution is not high enough.<br />
4) The system cannot process data in real time.<br />
<br />
'''Objectives'''<br />
According to the limitations of last year's project, the objective of this year's project is to improve the performance of the system which has been built by the students in last year. The main goals include using a better algorithm to improve signal resolution, reducing the effects of radio interference and processing data in real time.<br />
<br />
== Team members ==<br />
Hongwen Qu,<br />
Hanwen Chang<br />
<br />
== Supervisors ==<br />
Dr Withawat Withayachumnankul,<br />
Dr Brian Ng</div>A1714504https://projectswiki.eleceng.adelaide.edu.au/projects/index.php?title=Projects:2018s1-177_Radio_astronomy_with_software-defined_radio&diff=10582Projects:2018s1-177 Radio astronomy with software-defined radio2018-08-17T01:31:15Z<p>A1714504: /* Team members */</p>
<hr />
<div><br />
== Project name ==<br />
177 Radio astronomy with software-defined radio<br />
<br />
<br />
== Supervisors ==<br />
Dr Withawat Withayachumnankul,<br />
Dr Brian Ng<br />
<br />
== Team members ==<br />
Hongwen Qu,<br />
Hanwen Chang<br />
<br />
== Project introduction ==</div>A1714504https://projectswiki.eleceng.adelaide.edu.au/projects/index.php?title=Projects:2018s1-177_Radio_astronomy_with_software-defined_radio&diff=10581Projects:2018s1-177 Radio astronomy with software-defined radio2018-08-17T01:31:03Z<p>A1714504: /* Supervisors */</p>
<hr />
<div><br />
== Project name ==<br />
177 Radio astronomy with software-defined radio<br />
<br />
<br />
== Supervisors ==<br />
Dr Withawat Withayachumnankul,<br />
Dr Brian Ng<br />
<br />
== Team members ==<br />
Hongwen Qu<br />
Hanwen Chang<br />
<br />
<br />
== Project introduction ==</div>A1714504https://projectswiki.eleceng.adelaide.edu.au/projects/index.php?title=Projects:2018s1-177_Radio_astronomy_with_software-defined_radio&diff=10580Projects:2018s1-177 Radio astronomy with software-defined radio2018-08-17T01:22:07Z<p>A1714504: Created page with " == Project name == 177 Radio astronomy with software-defined radio == Supervisors == Dr Withawat Withayachumnankul Dr Brian Ng == Team members == Hongwen Qu Hanwen Chang..."</p>
<hr />
<div><br />
== Project name ==<br />
177 Radio astronomy with software-defined radio<br />
<br />
<br />
== Supervisors ==<br />
Dr Withawat Withayachumnankul<br />
Dr Brian Ng<br />
<br />
<br />
== Team members ==<br />
Hongwen Qu<br />
Hanwen Chang<br />
<br />
<br />
== Project introduction ==</div>A1714504