-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Thinking about this, that was a bad question from my side. Since the ofdm_mod doesn't even *know* about the center frequency, the signal generated digitally is always the same, so you can only be looking at the rx side's abs(FFT). Would be nice if you had a description of what happens or a screenshot uploaded somewhere!
Ok, you're seeing frequency selective behaviour. This can happen for a myriad of reasons, among these interference and multipath propagation. You're excluding interference as a reason on an ISM band, so I presume you're working with a direct cable between tx and rx or in an anechoic chamber; thus multipath can't be the reason, either. Greetings, Marcus On 07.08.2014 11:24, Marcus Müller wrote: > FFT sink at the receiver or attached to the transmitter GRC? > > Your GRCs don't work for me. With which version of GNU Radio were > they built? > > On 07.08.2014 11:10, chaitanya wrote: >> Hi Martin, thanks for reply >>> Wait, so it does work for more than one frequency? Where >>> exactly does it not work? >> Yes,it worked for more than one frequency .They are 2.45GHz >> ,2.455GHz and 2.46GHz. It did not work(that means not reliable) >> for 2.451GHz,2.452GHz,2.453GHz,2.454GHz and also between 2.456 to >> 2.459GHz. >> >> >>> Put in another way: The OFDM code is agnostic of the actual >>> frequency. There is nothing in the OFDM code that will make it >>> work better at one frequency than another. >> Yeah, I also expected that. Thats why i posted this question.It >> should work for all frequencies but its not working, I don't know >> why. >> >> Please if possible once try running those ofdm_sender.grc and >> ofdm_receiver.grc at 2.45Ghz and also at 2.452Ghz.And observe >> the FFT sink. >> >> chaitanya >> >> >> >> >> -- View this message in context: >> http://gnuradio.4.n7.nabble.com/OFDM-TRANSFER-and-RECEIVE-IN-GRC-tp49746p49841.html >> >> Sent from the GnuRadio mailing list archive at Nabble.com. >> >> _______________________________________________ Discuss-gnuradio >> mailing list [email protected] >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ Discuss-gnuradio > mailing list [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAEBAgAGBQJT40dNAAoJEAFxB7BbsDrLGjsIAKGEzoyvN8CePVFv/Yc2/boF DRRVdQc0blle5WOPnO0mxMUm1nQd1jge6NQdAZLl48nOVMK64TGG146XUyIMaf9F rGDkk3SREZMYZT37VzqWstsX5l+B7Kkdzn6sSajrXzHX558FuWXAv7dIMs/Z1JOb ylzQMHESH7jg7sUbMk6VcJTJ3jWSwB9Cin5+kCkNDfWDPWOAdg8XVec5bhgGUUEf yTqJoyYNO9lv9bQxlt7xEFtz2cZ2ofpN6ELDqCtRTopeYPDsMybW2dFUZ/qr7A8+ QSl0FJLNvCKCjKVg/S72KETYnyMxstU6dLyhIuN/QYxN45Io+zxET5lyJ3Ow804= =4L7A -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
