Dear Kyeong and Marcus, Thank you very much for your answers which help me to see better the challenges. I intend to start with Wi-Fi signals. We have a lot of Wi-Fi networks around us and I want to show the occupation/availability of Wi-Fi channels. I also intend to use gnu-radio.
With best regards, Trang Nguyen Le mar. 20 oct. 2020 à 07:37, Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> a écrit : > On 10/20/2020 01:05 AM, Kyeong Su Shin via USRP-users wrote: > > Hello Trang: > > It depends on your applications. USRPs CAN be used to scan and map the > wireless spectrum, but you will have to determine whether the spectrum is > empty or not, and it is not a trivial question. For an example, signals > from satellites and spacecrafts are often below the thermal noise, so you > will need to use special dish antennas and/or correlate the signals with > known sequences in order to detect them. Also, USRP B200/B210 are not > high-end spectrum analyzers, so they may show you some spurious signals > (possible false positives). > > So, yes, it is possible, but I don't know whether they are suitable for > your use cases. > > Regards, > Kyeong Su Shin > ------------------------------ > > Some further wisdom. SDRs are *components* in an overall engineered RF > *system and application*. They aren't "born" knowing your > particular application. > > You'll need some non-trivial knowledge of software development > methodologies, DSP knowledge, and knowledge of radio and electronics > to develop an application that suits your needs. > > Now, there are lots of applications for SDRs in general out there. I'd > suggest you query the discuss-gnuradio mailing list as well. > > But don't be surprised to find that an application that fits precisely > what you want to do doesn't exist. > > Consider two things: > > The set that could be described as "useful things you might want to do > with radio technology" > The set that could be described as "useful things you might want to do > with a computer" > > Both of those sets are staggeringly large. So even an intersection will > also be staggeringly large. So it should not perhaps be surprising that > not everything that could possibly be done with this technology has > already been invented, and conveniently packaged. > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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