Hi, > On Wed, 4/22/09, kaleem ahmad <email@example.com> 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
on 2009-04-22 13:11
on 2009-04-22 13:37
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: >> e.g. > > > Firas > > > _______________________________________________ > Discuss-gnuradio mailing list > Discussfirstname.lastname@example.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/cycle-period-detection-of-a-... Sent from the GnuRadio mailing list archive at Nabble.com.