Re: [Discuss-gnuradio] Wifi signal -pulse train+bspk

[Cinaed Simson]

On 12/17/18 5:56 AM, Horký Petr wrote:
> Hello,
> We are trying to take control over drone. 
> 
> The drone starts for example  at 2,4 GHz and has some pulse width, and
> pulse repetition frequency we know. 
> 
> Pulse1: at start of pulse there is 2,4GHz carrier to synchronize and
> then BSPK data (two numbers in binary)
> Pulse2: carrier 2,4GHz + BPSK
> Pulse3: carrier 2,45GHz + BPSK
> Pulse4: carrier 2,45GHz+BPSK
> Pulse 5: carrier 2,5Ghz +BPSK ....and so on
> After 12 pulses it starts again at 2,4GHz.

Just a drive by comment.

If the drone  is new it may be using WIFI, in which case it has an AP
(access point) onboard the drone.

To control the drone remotely you need to access the AP on the drone
with WIFI.

2.4 GHz analog is outdated - so it depends upon how old the drone is.

2.4 GHz digital (WIFI FPV) is the most popular - all you need is a cell
phone to control it.

The only thing I know about drones is one of my neighbors has one and he
uses his cell phone and WIFI FPV to control the drone,

And I know next to nothing about WIFI.


> 
> So I have pulse width, pulse repetition frequency, carrier frequency
> (which hops after 2 pulses), and BPSK (16 bits I think).
> I hope that now it is a little bit more understandable. :) In case it is
> not a will do my best to describe it better. 
> Thank you for help,
> 
> 
> Regards,
> 
> Petr
> 
>   
> 
> ------------------------------------------------------------------------
> *Od:* Müller, Marcus (CEL) <address@hidden>
> *Odesláno:* pondělí 17. prosince 2018 12:51:10
> *Komu:* address@hidden; Horký Petr
> *Předmět:* Re: [Discuss-gnuradio] Wifi signal -pulse train+bspk
>  
> Hi Horký,
> 
> could you give us a bit more context? The signal you're describing
> sounds like a single-carrier system, but (modern) WiFi is an OFDM
> system, so I'm not sure what you really want to achieve?
> Maybe paint the bigger picture of why you need this!
> 
> Best regards,
> Marcus
> 
> On Mon, 2018-12-17 at 10:12 +0000, Horký Petr wrote:
>> Hello guys,
>> my task is to create pulses with half period carrier/ half
>> period bpsk in it. After two pulses I hop to another frequency. Is it
>> possible to create this with only blocks, or I have to write the code
>> myself.
>> Can you give me your ideas how would you do that? Is using stream
>> tags the best idea here?
>> thank you. 
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