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From: Realbaltalyus on 27 Jun 2010 14:07
Hi Everybody,
I am a graduated student and not good at simulink.
I did a simulink model with using the below blocks in the same order
*Bernoulli Data Generator
*QPSK Modulator
*Multipath Rayleigh Fading Channel
*AWGN Channel
*DFE Adaptive Equalizer(LMS algorithm)
*QPS Demodulator
*Error Rate Calculation
the problem is that cancelling ISI by using Equalizer,
When there is no equalizer and no delay in multpath channel the BER is acceptable value r.p.t theoretical results.
When I added equalizer block the BER results ara ver poor 0.5(at this time I added second 2e-8 of the multipath channel)
How can I get good BEr results by this model?
Please, Help me and contact me. I need professional help, and I will pay in my budget for your help
From: Realbaltalyus on 30 Jun 2010 15:44
"Realbaltalyus " <baltalyus2004(a)yahoo.com> wrote in message <i08409$ijl$1(a)fred.mathworks.com>...
> Hi Everybody,
> I am a graduated student and not good at simulink.
> I did a simulink model with using the below blocks in the same order
> *Bernoulli Data Generator
> *QPSK Modulator
> *Multipath Rayleigh Fading Channel
> *AWGN Channel
> *DFE Adaptive Equalizer(LMS algorithm)
> *QPS Demodulator
> *Error Rate Calculation
> the problem is that cancelling ISI by using Equalizer,
> When there is no equalizer and no delay in multpath channel the BER is acceptable value r.p.t theoretical results.
> When I added equalizer block the BER results ara ver poor 0.5(at this time I added second 2e-8 of the multipath channel)
> How can I get good BEr results by this model?
> Please, Help me and contact me. I need professional help, and I will pay in my budget for your help
No Help,
Really Thanks everbody
From: Realbaltalyus on 5 Jul 2010 14:49
"Realbaltalyus " <baltalyus2004(a)yahoo.com> wrote in message <i0g6q5$3hn$1(a)fred.mathworks.com>...
> "Realbaltalyus " <baltalyus2004(a)yahoo.com> wrote in message <i08409$ijl$1(a)fred.mathworks.com>...
> > Hi Everybody,
> > I am a graduated student and not good at simulink.
> > I did a simulink model with using the below blocks in the same order
> > *Bernoulli Data Generator
> > *QPSK Modulator
> > *Multipath Rayleigh Fading Channel
> > *AWGN Channel
> > *DFE Adaptive Equalizer(LMS algorithm)
> > *QPS Demodulator
> > *Error Rate Calculation
> > the problem is that cancelling ISI by using Equalizer,
> > When there is no equalizer and no delay in multpath channel the BER is acceptable value r.p.t theoretical results.
> > When I added equalizer block the BER results ara ver poor 0.5(at this time I added second 2e-8 of the multipath channel)
> > How can I get good BEr results by this model?
> > Please, Help me and contact me. I need professional help, and I will pay in my budget for your help
> No Help,
> Really Thanks everbody
No Response from Everybody
From: Walter Roberson on 5 Jul 2010 14:55
Realbaltalyus wrote:
> "Realbaltalyus " <baltalyus2004(a)yahoo.com> wrote in message
> <i0g6q5$3hn$1(a)fred.mathworks.com>...
>> "Realbaltalyus " <baltalyus2004(a)yahoo.com> wrote in message
>> <i08409$ijl$1(a)fred.mathworks.com>...
>> > Hi Everybody,
>> > I am a graduated student and not good at simulink.
>> > I did a simulink model with using the below blocks in the same order
>> > *Bernoulli Data Generator
>> > *QPSK Modulator
>> > *Multipath Rayleigh Fading Channel
>> > *AWGN Channel
>> > *DFE Adaptive Equalizer(LMS algorithm)
>> > *QPS Demodulator
>> > *Error Rate Calculation
>> > the problem is that cancelling ISI by using Equalizer,
>> > When there is no equalizer and no delay in multpath channel the BER
>> is acceptable value r.p.t theoretical results.
>> > When I added equalizer block the BER results ara ver poor 0.5(at
>> this time I added second 2e-8 of the multipath channel)
>> > How can I get good BEr results by this model?
>> > Please, Help me and contact me. I need professional help, and I will
>> pay in my budget for your help
>> No Help,
>> Really Thanks everbody
> No Response from Everybody

You happened to hit a week in which both the USA and Canada had official
holidays that a lot of people extend into a bit of a summer vacation --
especially the areas that have been hit with big heat waves.


That said: I personally have little idea how to approach that task.
From: us on 5 Jul 2010 15:05
Walter Roberson <roberson(a)hushmail.com> wrote in message <i0ta0f$9t4$1(a)canopus.cc.umanitoba.ca>...
> Realbaltalyus wrote:
> > "Realbaltalyus " <baltalyus2004(a)yahoo.com> wrote in message
> > <i0g6q5$3hn$1(a)fred.mathworks.com>...
> >> "Realbaltalyus " <baltalyus2004(a)yahoo.com> wrote in message
> >> <i08409$ijl$1(a)fred.mathworks.com>...
> >> > Hi Everybody,
> >> > I am a graduated student and not good at simulink.
> >> > I did a simulink model with using the below blocks in the same order
> >> > *Bernoulli Data Generator
> >> > *QPSK Modulator
> >> > *Multipath Rayleigh Fading Channel
> >> > *AWGN Channel
> >> > *DFE Adaptive Equalizer(LMS algorithm)
> >> > *QPS Demodulator
> >> > *Error Rate Calculation
> >> > the problem is that cancelling ISI by using Equalizer,
> >> > When there is no equalizer and no delay in multpath channel the BER
> >> is acceptable value r.p.t theoretical results.
> >> > When I added equalizer block the BER results ara ver poor 0.5(at
> >> this time I added second 2e-8 of the multipath channel)
> >> > How can I get good BEr results by this model?
> >> > Please, Help me and contact me. I need professional help, and I will
> >> pay in my budget for your help
> >> No Help,
> >> Really Thanks everbody
> > No Response from Everybody
>
> You happened to hit a week in which both the USA and Canada had official
> holidays that a lot of people extend into a bit of a summer vacation --
> especially the areas that have been hit with big heat waves.

.... and those CSSMers from other continents won't be able to help because they don't have a clue...

us
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