Oh,I guess that because i receive signal which at the frequency of 2.45e9.It is like the wifi.May be I receive the wifi signal?Am i right? Thank you.
At 2014-07-15 05:17:35, "Martin Braun" <[email protected]> wrote: >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
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