On 07/15/2014 09:39 AM, xianda wrote: > Hi Martin: > Thank you for your kindly reply. > Another question I want to ask. > When I use the rx_ofdm,I add a UHD:USRP > Source.(Environment: USRP N210)I know when the block Schmidl &Cox OFDM > synch. detect the signal,the port "detect" will output 1.And I test it.I > use the rx_ofdm when I don't use the tx_ofdm.It means that no signal > exist.But I find 1 in the port "detect".Why?When no signal exist,it > should output 0.Why I see 1 from it?
...bad luck? It's not impossible to generate false alarms. What did you feed the block? Martin > Thank you so much. > Best regards, > xd > > > > > At 2014-07-14 04:37:37, "Martin Braun" <[email protected]> wrote: >>On 07/13/2014 01:06 PM, xianda wrote: >> Hi all: >> Have you ever using > the >> gnuradio/gr-digital/examples/ofdm/rx_ofdm.grc?And I change the >> > rx_ofdm.py as follows: >> > self.connect((self.digital_ofdm_chanest_vcvc_0, 1), >> > blocks.file_sink(gr.sizeof_gr_complex * fft_len, > 'channel-estimate.dat')) >> And i use the matlab: > >Please read the > fine manual: >>http://gnuradio.org/doc/doxygen/classgr_1_1digital_1_1ofdm__chanest__vcvc.html#details. >> >The channel estimate is on a tag. > >M > >>_______________________________________________ >Discuss-gnuradio > mailing list >[email protected] >>https://lists.gnu.org/mailman/listinfo/discuss-gnuradi > > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
