Thanks for your reply.. Then what will be the data rate across USB2.0?.
Normally in USRP documentation they have given that the samples were transfered in IQIQIQIQ fashion and each complex sample is a combination of two 16-bit integers,so 4 bytes per each complex sample ,hence the maximum data rate across the USB (for complex sampling)comes to(32/4=8) 8Mega complex samples per second In this case for wireless microphone I have used the USRP output type as complex in GRC and as told by you,each complex sample has 64bits (4byte float+j*4byte float).and i set the decimation for 128,so the sampling rate is(64M/128=500K)500K samples/second Does the maximum data rate across the USB becomes(32M/8 bytes=4M)4M complex samples per second? Does the actual data rate across USB in this case is 500K*8=4M samples/second? If i go below this decimation(128)then the (demodulated signal is not audiable in my experiment) then the data rate exceeds 4M saples/second,does this mean that i may lose some data across the USB? Does the complex sampling for FM,WiFi is really necessary?,in which cases we need to employee complex samping? please help me out Regards Lokesh lokesh reddy wrote: > > hi all > I have captured the Wireless Microphone signals using GRC and USRP, > flowgraph i have used was USRP Source-->File_sink. > In USRP source i have selected format option as complex and for file_sink > i have selected input format as complex. > Does the format of data written into file a complex data with each sample > has a size of 64bits? and what will be the data type and size of real and > imaginary values in each complex sample. > > one more thing how to get the python code generated by GRC? > > Regards > Lokesh Reddy > > > > -- View this message in context: http://old.nabble.com/regarding-the-format-and-type-of--data-in-GRC-tp28880033p28900762.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
