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BLOG.SDR.HUSEE MORE ON BLOG.SDR.HU SOFTWARE DEFINED RADIO RECEIVER APPLICATION WITH WEB-BASED 3 Introduction to OpenWebRX With the increasing number of integrated radio solutions becoming available, System on a chip (SoC) designs for radio frequency (RF) FREQUENCY XLATING FIR FILTER OPENWEBRX: SDR WEB APPLICATION FOR THE MASSES OpenWebRX: SDR Web Application for the Masses András Retzler, HA7ILM Department of Broadband Infocommunications and Electromagnetic Theory, Budapest University of DATA TYPES IN GNU RADIO You can find more about the data types available in GNU Radio in the Doxygen documentation. In GNU Radio Companion, data types are distinguished with colors on the ports: A full list of colors is available from the menu: Help > Types. You can only connect two ports with the same type: In general, complex signals have double bandwidthcompared
INTEGRATING DIGITAL DEMODULATORS INTO OPENWEBRX 1 Abstract OpenWebRX, a web-based SDR receiver application (the topic of my Bachelor's thesis), is an online communication receiver that supports AM/FM/SSB/CW demodulation, andBLOG.SDR.HU
BPSK31 and 3D waterfall diagram in OpenWebRX. Jul 12, 2017. Today I’m happy to announce a new version of OpenWebRX with a BPSK31 demodulator built-in. On the video below, I’m using OpenWebRX with a HackRF to monitor the 20m band and demodulate a BPSK31 QSO:. OpenWebRX now also has a 3D waterfall diagram, featured in the video below, which in addition also shows howBLOG.SDR.HU
fork() and stdin behaviour. I’ve stumbled upon this: if we fork() a process, its standard input and output file descriptors remain the same for both processes. It means that the forked process can read() from stdin, and then the read data is taken away, and the original process can’t read it.. Read More; John Seamons and ValentF(x) are selling their reputation on KickstarterBLOG.SDR.HU
However, this article should not end this sad. As I have aready written, I cannot be discouraged in my work by someone like John.Even if he goes away with a pile of money. Even if others go away with a pile of money. I am doing this work so that amateur radio operators and SDR enthusiasts can play with it, and students can learn from it. And I’m going to write more open source, as I’ve gotBLOG.SDR.HU
rtl_sdr in VirtualBox. Aug 18, 2015. The screenshot was made of a VirtualBox VM running Ubuntu 14.04 on a Linux MINT 17 host. rtl_sdr tool works inside the guest OS, after sharing the USB dongle with the guest under the Devices, USB Devices menu.. The source ofBLOG.SDR.HU
Quick setup instructions for OpenWebRX on Ubuntu. Jun 30, 2015. This is an absolute quick guide to install OpenWebRX, an SDR receiver software with a web UI.If you need more information or have a problem, please look at the GitHub page of the project.WWW.SDR.HU
301 Moved Permanently. nginxBLOG.SDR.HU
Article about the Frequency Xlating FIR Filter block in GNU Radio. Feb 19, 2017. I’ve written an article on a GNU Radio Companion block,and published here:
BLOG.SDR.HU
Debian package for 32-bit GitHub Atom text editor. I’ve recently had difficulty installing GitHub Atom on my PC as only an amd64 package was available on the official site. Here I’llBLOG.SDR.HU
Nov 5, 2016. What happens if you really try to add some CFLAGS to cmake from command-line. export CFLAGS="-Werror" export CXXFLAGS="-Werror" cmake .. make VERBOSE=1. but it does not do anything at all? If you encounter this problem, it is likely that you overwrite CFLAGS somewehere in your CMakeLists.txt files. For example,replace this:
THE SDR.HU PROJECT HAS BEEN FINISHED I'd like to say a big thanks to everyone who joined my journey withthis project!
I hope you had a good time listening on the site, and learnt some things about SDR. The purpose of this site was to provide a technological demonstration for amateur radio operators about Software Defined Radio, and I hope this goal has been reached. As this website was a one-person hobby project, with my tasks and responsibilities growing, and my focus moving to other projects at which I hope to make a greater positive impact, I'm unable to further develop SDR.hu and protect it from abuse. Furthermore, I think this site has some good alternatives now. Nevertheless, in my opinion amateur radio receivers should be shared with strict access control in the future. If you have more questions, feel free to consult the FAQ.73!
Andras, HA7ILM
FAQ
_Why has the site been closed?_ As stated above, it was a one-person hobby project, and I don't have the capacity anymore to neither develop or maintain the site, nor protect it from abuse. ------------------------- _Where can I download OpenWebRX and CSDR?_ You can still find OpenWebRX and CSDR on GitHub, and also my BScand MSc theses on
them.
------------------------- _Can I still use my KiwiSDR?_ The short answer is: YES. The KiwiSDR is self-hosted, so people who know the URL of your receiver will be able to access it. SDR.hu only provided a list of receivers for easier access. Note also that this website was not affiliated directly with the company developing and selling the KiwiSDR: it was a one-person hobby project instead. If you have KiwiSDR related questions, you can always reach that company through their e-mail address on kiwisdr.com.
------------------------- _I paid for a KiwiSDR. Why did you close down the "network of KiwiSDRreceivers"?_
I didn't do so, as SDR.hu was not a "network of KiwiSDR receivers". It was a hobby project, a free service that provided a list of the open source OpenWebRX-based SDR receivers, that also included the KiwiSDRs, but not exclusively. I don't think I've made a promise either on how long would this personal project last. Furthermore, the KiwiSDR is self-hosted, so people who know the URL of your receiver will still beable to access it.
Note also that this website was not affiliated directly with the company developing and selling the KiwiSDR. If you have KiwiSDR related questions, you can always reach that company through their e-mail address on kiwisdr.com . ------------------------- _SDR.hu was the only way for me to listen to amateur radio. What do Ido now?_
I'm very sorry to hear that. Unfortunately, some people (including me) don't have the possibility to install antennas at home. The purpose of the site however was to be a technological demonstration of the possibilities of Software Defined Radio. It was not the purpose to totally replace real-world amateur radio equipment for you. ------------------------- _Will you help me with OpenWebRX related problems?_ No, I'm sorry, due to lack of time I am unable to help hams with OpenWebRX related problems. Note that I don't work on OpenWebRX anymore either. If you have questions regarding my old projects, make sure you first try to find the solution in the Wiki section of theproject on GitHub.
------------------------- _Will you help me with KiwiSDR related problems?_ No, I'm sorry, I'm not affiliated directly with the company developing and selling the KiwiSDR. If you have KiwiSDR related questions, you can always reach the company through their e-mail address onkiwisdr.com .
------------------------- _I have more questions about SDR.hu and OpenWebRX, and I sent you an e-mail. When will you reply?_ I'm very sorry, I don't want to be impolite, but I'm so overwhelmed with e-mails about those projects already that there is a chance I won't reply to some of them. ------------------------- _I used your website in my job, for non-amateur purposes. What do I donow?_
Well, you were not allowed to do so. This website was for amateur radio only, right from the beginning. ------------------------- _After the site has been closed, what happened to the personal data that I provided during registration and usage?_ All personal data has been deleted from the database of the website, and will be deleted from all backups within 1 year. (The last privacy policy of SDR.hu is still available here.)
Andras, HA7ILM | 2020-07-05Details
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