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Re: [Discuss-gnuradio] (no subject)

From: Marcus Müller
Subject: Re: [Discuss-gnuradio] (no subject)
Date: Mon, 14 Dec 2015 13:25:23 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

Hi Vingnu,

so you mean that on one frequency, you want to have a CW tone, and one
the next frequency another etc, but not continuous phase across frequencies.
** Do I understand that correctly? ** I'm confused because you then
mention "pulses", and that is a concept that is incompatible with CW radar.

Hardware-wise, most USRPs (which one are you using) support timed
commands so that you can tune at a specific sample time. For those that
don't, you'll have to use some time buffers, but it's essentially what
the example probably does that you cite -- though you're not really
telling me which example exactly you're referring to.

All in all, please try to make your questions a little more precise, add
all the details that are important right from the start.

Best regards,

On 14.12.2015 12:05, vingnu GNU wrote:
> Hi ,
> That is nothing but in examples of USRP they have used FMCW for target
> simulator with frequency modulated CW here in my case I am going to use
> unmodulated CW  .
> My question was ,is it possible to increment this CW signal source interms
> of 60MHz step size and keeping 250usec of dwell time between 60MHz steps
> and it should be upto  2GHz and repeating same in next cycle.
>  ex: first frequency is 1GHz it has to add 60MHz step size and keep 250usec
> of dwell time i.e.,after 1.06GHz pulse it has to maintain 250usec dwell
> time before next 60MHz pulse .
> regards
> vingnu
> On Mon, Dec 14, 2015 at 3:44 PM, Marcus Müller <address@hidden>
> wrote:
>> Hi Vingnu,
>> that's all nice, but what does "continuous wave" _mean_?
>> Best regards,
>> Marcus
>> On 14.12.2015 10:02, vingnu GNU wrote:
>>> Hi marcus,
>>> Its like this : generating continuous wave of signal which starts from
>> 1GHz
>>> and it has to increase in steps of 250usec upto 2GHz.Then I wanted to
>> feed
>>> it for Radar transmitter.Its like generating Step frequency continuous
>> wave
>>> signal for radar transmitter. Is it possible from GNU radio and I am
>> having
>>> USRP E310 right now.
>>> regards
>>> Vingnu
>>> On Mon, Dec 14, 2015 at 2:06 PM, Marcus Müller <address@hidden
>>> wrote:
>>>> Hi Vingnu,
>>>> note that GNU Radio is software that handles sample streams, so yes, any
>>>> signal that you can imagine in a given bandwidth can be generated; the
>>>> question is whether you can realize that signal in the physical world.
>>>> So:
>>>> * do you just want to simulate the signal or really transmit that?
>>>>   * if you want to transmit that, with which hardware?
>>>> * what exactly is "continuous wave" for you here? Continuous for a
>> single
>>>> frequency step, or continuous across multiple frequencies?
>>>> Best regards,
>>>> Marcus
>>>> On 14.12.2015 05:59, vingnu GNU wrote:
>>>> Hi every one,
>>>> Is this possible to generate step frequency continuous wave for
>> frequency
>>>> range of 2GHz to 4GHz in GNU radio and step size in range of 250micro
>>>> seconds(Dwell time).
>>>> regards
>>>> Vingnu
>>>> _______________________________________________
>>>> Discuss-gnuradio mailing address@hidden://
>> lists.gnu.org/mailman/listinfo/discuss-gnuradio
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