Add support for HackRf. #53
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Thanks for submitting the PR! This is great.
Most of my comments are style related, where the style deviates from the style in the rest of the code. I don't have clang-format file in here yet but should add one so it's not longer something to review.
Could you rename HackRf -> HackRF? This is the capitalization used by GSG.
| uint8_t bb_gain = 30; | ||
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| // Enables or disables the RF amplifier | ||
| bool rf_amp_enabled = 0; |
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I hadn't heard of this one. Is it some kind of AGC?
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Line 62 is for supporting the little amp package that the HackRF has internally (https://github.com/mossmann/hackrf/blob/master/doc/hardware/hackrf-one-schematic.pdf): https://www.broadcom.com/products/wireless/amplifiers/gain-block-and-drivers/mga-81563
The HackRF wiki has some documentation for the gain settings here: https://github.com/mossmann/hackrf/wiki/FAQ#making-sense-of-gain-settings
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| void HackRf::process(size_t nsamples, unsigned char* buf, | ||
| std::complex<float>* fo) { |
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For future reference, do you have a preferred line width? Done
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Please take another look :) |
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Is there any update on this? I've been having the same issue. |
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Renaming complete HackRf -> HackRF. |
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Hi, thanks Pietern for the tools and Nqbit for this PR! My setup works fine with this fork using an RTL-SDR. The Hackrf also seems to work fine in other situations (eg I can receive FM using GQRX). I don't know the specifics of the dish/LNA as I've just been provided with a line, but can find out if that's relevant. My hackrf_info gives the following: The same issue was present with older firmware (2018.something). I'm using Ubuntu 20.04. |
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@kazaril Hey Sam, are you sure you're pointing at the right satellite? It is possible you're looking at GOES-18 which is only transmitting a HRIT carrier at this point. That is consistent with the constellation you're seeing. |
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@pietern the signal is immediately locking regardless of what frequency I select. I can receive LRIT fine using the RTLSDR dongle with the same setup, but I'm wanting to get the HackRF working so that I can move on to HRIT (pretty sure the RTLSDR doesn't have the bandwidth for it) EDIT: OK, so it looks like the issue is due to HackRF having a big spike at centre frequency due to not having matched components (they had to make some sacrifices to keep the price down). I might have to write something to filter it/have a frequency offset. I wonder why @nqbit didn't have this issue, maybe just got lucky with his HRF. |
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@kazaril I am now having the exact same issue as you with the large DC spike in the center causing lots of issues. Were you able to get a frequency offset working? |
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@gornstein I fumbled around for a while trying to add the offset to the code but in the end just switched to Satdump as it has a DC block option built in. If you do end up getting the offset working in Goestools please let me know - I'd be very curious to hear how it performs. |
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@kazaril alright thanks, I'll be sure to let you know if I get anything working! |
I have have verified that I am able to collect images with a HackRf plus a GOES SAW Bird (LNA + SAW Filter) attached to my laptop.