nuand

4 ms·

1.
by nuand 3y ago
https://sat-smt.codes/ is the best introductory to expert, and reference work I've ever read on SAT/SMT solvers
2.
by nuand 3y ago
I just ran these past OpenAssistant and I'm seeing a much higher error detection rate. I've tried 6 so far, and it's caught bugs in about 4. OpenAssistant actually had a very good technical explanation of the bug it found in
3.
by nuand 5y ago
Wifi is a pretty difficult protocol, but fortunately Linux ships with mac80211. So all that is needed is an SDR based PHY such as https://github.com/Nuand/bladeRF-wiphy/ .
4.
BladeRF-wiphy: Open-source, software defined radio modem(nuand.com)
292 points by nuand 6y ago|55 comments
5.
by nuand 9y ago
The "fix" Intel pushed out this week is a microcode update that in my experience doesn't fix or address Meltdown at all. The update does however make Spectre slightly less reliable, so I'm going to assume that the microc
6.
by nuand 9y ago
Nope, it's all in the MAC and additional usermode services that help phones identify to the network using, in most cases, its SIM.
7.
by nuand 9y ago
Eventually yes, we can expect to see optical in desktops. Fiber connections are "better" but also much more expensive. The price should eventually come down as volumes increase. The main delaying factor is that copper is still goo
8.
by nuand 9y ago
Take a look at slides 9 through 15 of this presentation: https://pcisig.com/sites/default/files/files/PCI_Express_Ele... PCIe signals are generated by transceivers -- devices within chips that are specia
9.
by nuand 10y ago
$6.9 billion? sounds like this fire is razing quite well
10.
by nuand 10y ago
The Google ads ban does not affect players like LendingClub/SoFi/Avant since they are long term loans with interest rates similar to credit cards.
11.
by nuand 10y ago
Yea, I am too
12.
by nuand 10y ago
Been working on this for a few months, and just added the finishing touches. It's a high performance ADS-B receiver that can detect and correct multiple bit errors and packet collisions. The FPGA offload allows a Raspberry Pi to proces
13.
Show HN: High performance VHDL based ADS-B decoder(github.com)
5 points by nuand 10y ago|1 comments
14.
by nuand 10y ago
Yes, you are correct. Some parts of LTE and WCDMA use a pre shared secret and rolling keys to allow UEs to identify themselves to the mobile network. There are however many non-data carrying parts of LTE that are not encrypted or authentica
15.
by nuand 11y ago
It will depend on the material, but I don't think 802.11ad can even penetrate through sheetrock. Honestly it may even be so bad that a sneeze could knock your connection out for a few seconds.
16.
by nuand 11y ago
The laser analogy is definitely accurate given today's technology. I just don't think they'll be able to productize something that has that high of an antenna gain. I'm really hoping and thinking that we'll see some
17.
by nuand 11y ago
60GHz also limits you to direct line of sight. 60GHz propagates similar to a spotlight.
18.
by nuand 11y ago
The "statistic" seems to make a point that taking a bet on a strategy and losing is incompetence.
19.
by nuand 11y ago
If you want an introduction to assembly with the hopes of achieving super complicated in the future, I would suggest taking a look at the Intel manuals [1]. Volume 1 specifically offers an overview of the processor's architecture and u
20.
by nuand 11y ago
Monitor mode is a MAC level concept, and doesn't alter any of the RF characteristics that would make operating this device illegal. (This is not legal advice. Consult with an attorney, etc etc)
21.
by nuand 11y ago
OFDM 802.11 rates already have a significant amount of Forward Error Correction. 802.11g uses a convolution encoder and Viterbi Decoder [1], and 802.11 HT rates (n, ac, ad) can also use Low Density Parity Codes (LDPC) [2]. The problem with
22.
by nuand 11y ago
OpenBTS and YateBTS need a full-duplex radio to function. So far only Ettus radios and bladeRFs [1] have those capabilities. The bladeRF is also the cheapest option, costing in the low 3 figures (with coupon code HKRNWS). Full-disclosure, I
23.
by nuand 11y ago
Cellphones are half duplex but the basestation is generally full-duplex. A half-duplex basestation could probably handle no more than one cellphone. OpenBTS and YateBTS, as well as most commercial basestations, have design patterns that req
24.
by nuand 11y ago
The options, RSU, and NSO packages remain as-is. The only thing that changes is the tax situation. Excercising options after a stock is publicly traded is viewed and taxed exactly as income.
25.
by nuand 11y ago
Would anyone use Altium, KiCad, or Eagle if they had access to OrCAD, Allegro, or PADS? Having used all of those tools, I can say that KiCad and Eagle will remain relegated to the low layer count, and at most moderately populated PCBs. Alti
26.
by nuand 11y ago
Zimride came first and eventually changed its name to Lyft. Zimride offer a carpooling ride sharing matching service.
27.
by nuand 11y ago
Seems like an interesting approach. However the 21x speedup seems a little underwhelming considering the speed of the Zynq's programmble logic fabric and how parallizable NNs are. They're quoting a 21x speedup over the ARM process
28.
by nuand 11y ago
From the article: "Banks say interchange fees help cover the cost of fraud. Retailers argue that fees should therefore decrease if fraud is reduced." In my three year history of taking credit card payments online there has never b
29.
by nuand 11y ago
OpenBTS, YateBTS, OsmoBTS, and Osmo-BB are already doing some pretty interesting things. They could interact with existing networks if the devices running them could be FCC certified.
30.
bladeRF, a USB 3.0 SDR platform looks to be the RaspberryPi of radios(nuand.com)
2 points by nuand 14y ago|1 comments

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