Viewing profile — jxj

To my understanding, the main difficulties are: 1. The investment needed for a real "free" Wi-Fi chip is much higher than most people's (FPGA, DIY, enthusiast and garage guys) imag…

We do even further. If we use openwifi as a router in home, it can fuzz the CSI and destroy those sensing method: https://github.com/open-sdr/openwifi/blob/master/doc/app_not...

"free software", "for any purpose", beautiful target. But maybe it can not be achieved in one step. People select a license for purpose. No matter what is the purpose, the develope…

Ok. Actually I never (and don’t know who) call AGPL software a free software. Let’s just call it AGPL software! Problem solved. Just curious, if AGPL is so evil, who made it for wh…

If you are saying AGPL's virus like behavior is much more severe than the GPL's virus like behavior, I am not professional on this aspect. Not sure. If I understand correctly, the …

But in the MongoDB case (when it was still using AGPLv3), those companies who violated AGPLv3 did have a solution: pay a fee for a commercial license of MongoDB instead of AGPLv3 w…

So GPL doesn’t have this character? Like the GPLv2 taken by Linux kernel. I have an impression that AGPL only add “A” to GPL to adapt itself to the cloud era. Because a cloud/servi…

How so?

2000USD? Not really. Following two options are less than 1000USD: 1. zed board + fmcomms4 = 883 USD https://www.digikey.com/product-detail/en/digilent-inc/410-2... https://www.digi…

A short answer: yes you can. A bit longer answer: Basically Linux gives packet to our driver, and then our driver gives the packet to our FPGA for further processing (queuing, modu…

Good and tough question. So far, we are not very successful to find enough funding to bring the design to the next mature level and tape out it. Working on it, but difficult. No on…

Indeed, not only the viterbi but also many basic building blocks in the Xilinx and Analog Devices reference design which is the starting point of our openwifi project. Viterbi won'…

8bit I/Q definitely can be used for WiFi. I used HACKRF to send and capture Wifi packet without an issue (offline, use Matlab to process the captured I/Q samples). Low resolution I…

I like this sentence "nothing works until just about everything is working". Actually the first ping worked in the end of 2018 to the beginning of 2019. But like you also realize, …

Hello, This is the author Xianjun. When communicate with commercial device, tcp can achieve ~30M, UDP can achieve ~38M in 20MHz 11a/g non MIMO mode. We are still working hard to op…