Re: [Discuss-gnuradio] cycle/period detection of a cyclic/periodic transmitter

[kaleem ahmad]

Thanks Firas,

The transmitter which I want to detect the cycle for (You are correct that I
want to find that repitition cycle). I am little bit confused to know what
is the duty cycle of it. But I can simply tell that it always transmitt a
fix packet (with bitrate=500kbps) of 1220 micro sec including preamble. It
means that after every T ms (T is repetition cycle time and can be a fixed
value from range: 1ms...200ms, I selected 10ms for ablove given data) it
transmitts a 1220 microsec long signal.

Is it sufficient???

Could you have a look at code and especially the decimation process and the
filter_coefficients???

Best Regards

Firas A. wrote:
> 
> 
> Hi,
> 
>> On Wed, 4/22/09, kaleem ahmad <address@hidden> wrote:
>> 
>> Hi All, 
>> 
>> I am trying to detect the cycle (or period) time of a cyclic data
>> transmitter by sensing the channel. The transmitter can be any general
>> e.g.
>> FSK/ZigBee/Bluetooth etc, and transmitting a fixed packet after every 'T'
>> ms. I am interested to detect this T using GNURadio/USRP.
>> 
> 
> You info is not enough. 
> 
> For a cyclic transmitter there is a transmission duty cycle and repetition
> cycle. From what I understand, you are trying to measure repitition cycle.
> 
> But,
> 
> What is the duty cycle of your transmitter (the time it will stay ON)? 
> 
> For example, Blue tooth is a frequency hopping device. It hops 1600
> hop/sec. This means the duty cycle for it is 625usec. 
> 
> 
> 
> 
> 
> Best Regards,
> 
> Firas
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
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> 
> 

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