Channel Modelling

>On Aug 22, 5:57=A0am, "cpshah99" <cpsha...@rediffmail.com> wrote:
>> >On Aug 21, 1:52 pm, "cpshah99" <cpsha...@rediffmail.com> wrote:
>>
>> >> HI Julius
>>
>> >> Thanks again.
>>
>> >> I used the same channel for QPSK and 16 QAM.
>>
>> >> Now, in the case of 16 QAM, just to see if my receiver right or not,
I
>> >> removed the noise and instead of channel I juts made it awgn. It
>> worked
>> >> nice, no errors.
>>
>> >> And also after adding channel and noise, I checked the raw scatter
>> plot
>> >> after the equalisation. It was very scary....
>>
>> >> And can u please tell the factors to be considered.
>>
>> >> Thanks again.
>>
>> >> Chintan
>>
>> >Um. =A0How about just the channel and no noise?
>>
>> Hi
>>
>> No improvement....
>
>Chintan, what do you mean "no improvement".  Nobody can help
>you unless they can understand what you are saying.
>
%%%%

Hi Julius

Extremely sorry for not replying properly.

As u had said to run with channel effect and 'no noise', and I did the
simulation, but still I am getting errors even at high SNRs.

I think the adaptive equaliser is not working or 16 QAM is too sensitive
to multipath.

Thanks

Chintan

On Aug 22, 8:44&#4294967295;am, "cpshah99" <cpsha...@rediffmail.com> wrote:

>
> Hi Julius
>
> Extremely sorry for not replying properly.
>
> As u had said to run with channel effect and 'no noise', and I did the
> simulation, but still I am getting errors even at high SNRs.
>
> I think the adaptive equaliser is not working or 16 QAM is too sensitive
> to multipath.
>
> Thanks
>
> Chintan

OK, so what is the amount of ISI without equalization,
and what is the amount of ISI after equalization?

How does the channel look like after equalization?