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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] Problem with receiver section in BPSK |
Date: | Sat, 30 May 2015 20:03:39 +0200 |
User-agent: | K-9 Mail for Android |
I was not getting anything till now but lately I made some changes and now I am getting the output but its no where similar like the input signal.And about the constellation I am not able to get it anywhere near perfect.
Thanks,Marcus
On 30-May-2015 23:07, "Marcus Müller" <address@hidden> wrote:I don't understand -- are you seeing nothing at all or are you seeing ISI?
Again: what's your pulse shape? Does it fit in your channel bandwidth? Do you fulfill the Nyquist ISI criteria?
As you know, there's solid theory in why ISI occurs, why you need to limit your signal's bandwidth and how you can counter it. What parts of these considerations did you address with your transceiver system? You only say you do bpsk, but doing symbol mapping is only part of the job that a transceiver needs to do.
Best regards,
MarcusAm 30. Mai 2015 17:53:25 MESZ, schrieb Anil Gaddam <address@hidden>:I am not getting anything on the output that's the issue if at all I'm getting some output then I would think about matched filtering .
Thanks,
MarcusOn 30-May-2015 21:16, "Marcus Müller" <address@hidden> wrote:Hi,
On any multipath channel there will be some isi. What do you do to suppress that? What kind of filtering/pulse shaping do you do? Does matched filtering solve your issue?
Best regards,
MarcusAm 30. Mai 2015 15:12:26 MESZ, schrieb Anil Gaddam <address@hidden>:Hello everyone,
I tried to implement bpsk system.I am successful with the transmission part but I am able to see the ISI when I am observing the constellation at the transmitter side. I tried to design the receiver side same as the transmitter but just the opposite way i.e, using block Psk demod and packet decoder, but I am not able to get anything on the receiver side. Can some one pls help me wid this.
Regards,
Anil Gaddam
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