cedivad

7 ms·

1.
by cedivad 2y ago
<shill mode> you can run SRSRan on a small self contained SDR such as the Seeve board. Throughput is not going to be good as a custom stack as it's unoptimised, though. https://rfnm.com/blog/introducing-seeve
2.
by cedivad 3y ago
> When my AoA sensor fails, then what? crickets, let's just randomise which sensor we use during boot, that ought to do it!
3.
by cedivad 3y ago
Strange. I haven't changed a thing. Just to confirm, the problem yesterday was that the website would be stuck, not that you couldn't move down further by scrolling in an unnatural way, right?
4.
by cedivad 3y ago
:-) The HF daughterboard is the only thing that's missing, I think. To be honest, I was hoping for someone to suggest a nice design on that front. Here is a render of the enclosure (work in progress): https://i.imgur.com&#x2
5.
by cedivad 3y ago
PPS input/output is off to the side, look for the "User Interface Connector" paragraph on the website. > What do you mean? Do you have your own DSP stack to deal with that while user receiving/transmitting? If there i
6.
by cedivad 3y ago
Is this with an older Firefox version maybe? I've tried with a relatively recent one and couldn't reproduce, but I'll look at the logs and try to fix this now that the HN storm has passed :-)
7.
by cedivad 3y ago
It would need to be a different design entirely.
8.
by cedivad 3y ago
NXP are open sourcing a lot of the support stack for the LA9310 to go along with this product release, but I'm afraid they consider the VSPA DSP to be highly proprietary, yes. Example: https://github.com/nxp-qoriq?q=la9
9.
by cedivad 3y ago
The schematics will be released publicly when the product is shipping, but it won't be OSHW. I don't want to end up like the HackRF, where one small company is burdened with supporting an ecosystem of what is mostly clones. The Ha
10.
by cedivad 3y ago
You'd probably want something way more sensitive than that, right? Something that goes well into the micro/nanovolts rather than millivolts. But it should be reasonably simple to do. Also the RTL board when designed with a good fr
11.
by cedivad 3y ago
8x ADCs and 2x ADCs @ 153 MSPS -> 4x RX I/Q pairs and 1x TX I/Q pair. The way the math works, you can sample a 153 MHz signal at 153 MSPS using I/Q, or you can use each ADC line to sample at nyquist, and in that case you g
12.
by cedivad 3y ago
We need volumes, so the best I can hope for is people join the waitlist and pre-order when we show a functioning prototype. We already placed sizeable orders with the manufacturers and have the first batch planned for September, but further
13.
by cedivad 3y ago
Here is a fast render of what the enclosure might look like (work in progress): https://i.imgur.com/AEYgLxU.png The idea is however you get shielding and cooling, sit it on the desk upside down and have all the RFNM boards
14.
by cedivad 3y ago
A few practical use cases that are not easily covered by similar platforms: 1) Direction finding thanks to the 8x 153 MSPS ADCs and coherent clocks. 2) Mixed domain analyzer: have one daughterboard act as a RF receiver, and at the same time
15.
by cedivad 3y ago
No, I think your feedback is fair, MMCX connectors are certainly more durable. Maybe the tradeoff there is that they are not as common, so I might need to include adapters as well. I would like to have them on the opposite side of the board
16.
by cedivad 3y ago
I don't like them either, but I couldn't find a better way to provide the clock in/out feature and still fit in that area of the board. The optional OCXO on the opposite side of the U.FL connectors doesn't help (can&#x27
17.
by cedivad 3y ago
I can't commit to pricing before I have decided on a partner for the distribution (DIY vs Kickstarter vs Crowdsupply, they all come with different costs and tradeoffs), but $550 is my target retail price for the Motherboard + Granita +
18.
by cedivad 3y ago
The Granita board should already work down to 10 MHz. If you need to go lower, I (or someone else) would need to design a custom RFNM daughterboard for low frequencies. You could do direct conversion up to 150 MHz, so it should be a simple
19.
by cedivad 3y ago
A few reasons: (1) The AFE7903 wouldn't allow for any modularity in the system (look at what we are calling the RFNM interface on the website, I think that's the real reason this platform will work), (2) Pricing, that single chip
20.
by cedivad 3y ago
We should have a fair number of boards going around in a couple of months (10-20), when the first batch is done and basic software is complete. Mostly as loaners at first as there will be more requests than boards, but everyone that contrib
21.
by cedivad 3y ago
I routed the i.MX block like a normal human being, then rotated everything 23 degrees to (1) avoid the fiber weave effect and (2) not collide with any of the mounting holes, as that placement needs to be symmetrical under the slots for the
22.
by cedivad 3y ago
*i.MX 8M Plus, please :-) The 8M Plus is not that different from the RPi4! Yes, of course, this will be sold to anybody and be very, very competitive, like in the order of ~$550 including the Granita board ($100 less for GranitaLite).
23.
by cedivad 3y ago
You need to work directly with NXP. Our first big batch will be here in September. We could have had them earlier but there are plenty of different moving parts, things to do and software to write, so September is a good compromise. But yes
24.
by cedivad 3y ago
I designed this system (not the chip, clearly), so feel free to ask any questions!
25.
NXP LA9310: A new platform for SDR and the 10-year-old AD9361 RF Transceiver(rfnm.io)
74 points by cedivad 3y ago|62 comments
26.
Move Over, AD936x: An Innovative Software Defined Radio Architecture(rfnm.io)
3 points by cedivad 3y ago|0 comments
27.
A Next Gen Hardware Architecture for Software Defined Radio (and More)(rfnm.io)
6 points by cedivad 3y ago|0 comments
28.
by cedivad 4y ago
This 50 minutes-old post with 145 points has been nuked from the first page. And the second, and the third. lol.
29.
by cedivad 4y ago
This is a great preview of what will happen in the wake of the Great Tether Collapse.
30.
by cedivad 4y ago
No, you had a bad test setup. BT is 10dB below wifi, I can't see how what you are saying makes sense. Also it uses simple encodings that save on processing power but require more rf power to be decoded successfully.

More ›