Howard Su @csujun
Programmer from the large cluster to the small chip, Radio Amateur howard0su.github.io Shanghai, China Joined August 2011-
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Intel HW is too complex to be absolutely secure! After years of research we finally extracted Intel SGX Fuse Key0, AKA Root Provisioning Key. Together with FK1 or Root Sealing Key (also compromised), it represents Root of Trust for SGX. Here's the key from a genuine Intel CPU😀
Today I learned that opamps can be arranged in parallel to reduce overall noise. Makes sense, I guess, but I've never seen it in a commercial design.
Using this method, the RX888/888MKII can direct-sampling all range of FM broadcast band without using a down converter. However, it requires a high-performance BPF. sdr-prototypes.blogspot.com/2021/03/fm-ban…
RX888をLinuxで動かそうとlibsddcを試しているが、今ひとつうまく行かない。古いlibrf103ではうまく動くようだが、libsddc1.0.1ではclose()の時にFX3にRESETを送るところで失敗するし、v1.1.0では、callback関数が130回めに呼ばれたところでSEGVで死んでしまう。
2021 ...New year of serial debugging (if any on real life).
@csujun @otti_sat @giammaiot2 @csujun : I am seriously considering getting a RaspSDR. I wonder if you could recommend a reliable source which sells good quality hardware and if there is a source for working boards without a Raspberry Pi? I already have several Raspberries (3b+ and 4b). Thanks!
Nice tip on LW/MW receiving with RX888: github.com/ik1xpv/ExtIO_s…
Also, I am doubt if they really understand the code and be able to support it.
Also, I am doubt if they really understand the code and be able to support it.
New extio for RX888 RC1 released. Many people over couple of months work. The power of opensource. Lots of new features and much improved user experience. Please test and report issues. ExtIO_sddc.dll v1.1 RC1 sdr-prototypes.blogspot.com/2020/12/extios…
You may want to report this bug to sdrconsole author.
GiamMa-based researchers SDR R&D IoT: libsddc - A low level library for wideband SDR receivers like BBRF103, RX-666, RX888, HF103, etc giammaiot.blogspot.com/2020/11/libsdd…
Mr. ik1xpv, the author of the RX888 prototype BBRF103, tested the reception performance, dynamic range, and noise figure of RX888. Thanks again for making high-performance SDR cheaper and easy to obtain. sdr-prototypes.blogspot.com/2020/10/rx888.…
Wrote a blog on the details of dsp logic in one sdr project. More complex than your thought. It is a code reading notes when I read Teensy Convolution SDR project code. howard0su.github.io/sdr/2020/09/28…
SDR++ runs on OS X now. UI is so consistent because of ImGUI. You cannot really tell it is running on OS X & MacBook.
Rust 1.47.0 has been released, featuring standard library traits on large arrays, shorter backtraces and many more changes! Check out the highlights on our blog: blog.rust-lang.org/2020/10/08/Rus…
Blog & SDR Prototypes receiver designs by Oscar Steila ik1xpv sdr-prototypes.blogspot.com & steila.com/blog/
An Intuitive Look at Moving Average and CIC filters. tomverbeure.github.io/2020/09/30/Mov…
You are absolute right. I tried it, which far better than dump1090. One small regression that readsb doesn't support http server natively. I ported the code from dump1090 over. Now you can run readsb just like dump1090. check it out: github.com/howard0su/read…
You are absolute right. I tried it, which far better than dump1090. One small regression that readsb doesn't support http server natively. I ported the code from dump1090 over. Now you can run readsb just like dump1090. check it out: github.com/howard0su/read…
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