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Re: [Discuss-gnuradio] ofdm channel estimation

From: xianda
Subject: Re: [Discuss-gnuradio] ofdm channel estimation
Date: Tue, 15 Jul 2014 15:39:09 +0800 (CST)

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?
                Thank you so much.
Best regards,

At 2014-07-14 04:37:37, "Martin Braun" <address@hidden> 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 >address@hidden >https://lists.gnu.org/mailman/listinfo/discuss-gnuradi

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