Re: [Discuss-gnuradio] Problem with receiver section in BPSK

[Marcus Müller]

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,
Marcus

Am 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,
>Marcus
>On 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,
>> Marcus
>>
>> Am 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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>> --
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>>

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