FPGA Central

Hi all,

I am new in WiMax and I intend to construct the table of modulation, SN
and BER..
does anybody know how can I do it and by which equation ? I mean the tabl
can be like the following:

SNR modulation type data rate BER
--- --------------- -------- ----


thanks for any help,
Ashlie

hi aleen,
regarding this the best what you can do is you refer to
802.16E (mobile wimax) standard, there exists already a table of such
sort in that standard. if you dont find there, you can find it there at
(802.16-2004) standard or fixed wimax standard (802.16-2004's other
name).
Regarding BER, " there is compliance based limit that BER should be
this much "

regards
particlereddy



Aleen wrote:
> Hi all,
>
> I am new in WiMax and I intend to construct the table of modulation, SNR
> and BER..
> does anybody know how can I do it and by which equation ? I mean the table
> can be like the following:
>
> SNR modulation type data rate BER
> --- --------------- -------- ----
>
>
> thanks for any help,
> Ashlie

Thanks particlereddy,

I found these value but I would like to make a correspondance between SN
and BER using curve. Is there any fixed value for BER for the SNR ? an
can I consider wimax mobile just like wimax fix as the same thing in thi
issue ?

thanks,
ashlie

PS: I saw your answer only this day, as I do not know how to follow m
mail in this mailing list




>hi aleen,
> regarding this the best what you can do is you refer to
>802.16E (mobile wimax) standard, there exists already a table of such
>sort in that standard. if you dont find there, you can find it there at
>(802.16-2004) standard or fixed wimax standard (802.16-2004's other
>name).
>Regarding BER, " there is compliance based limit that BER should be
>this much "
>
>regards
>particlereddy
>
>
>
>Aleen wrote:
>> Hi all,
>>
>> I am new in WiMax and I intend to construct the table of modulation
SNR
>> and BER..
>> does anybody know how can I do it and by which equation ? I mean th
table
>> can be like the following:
>>
>> SNR modulation type data rate BER
>> --- --------------- -------- ----
>>
>>
>> thanks for any help,
>> Ashlie
>
>

Hi, aleen,

As I know, there is no mapping such as SNR range : BER in WiMax,
because
the standard use AMC. (But, there is a similar AMC table including
modulation scheme, code rate, etc)
In AMC, if we got low SNR, we use more reliable mode but having low
code rate
to achieve a reasonalbe error rate(PER 0.1 ~ 0.01%). Otherwise(good
SNR),
16QAM or 64QAM can be used to send much more in given time. In this
case, we also will get 0.1 ~ 0.01 PER. (Here, PER is PDU error rate)

See this: Jamshid Khun-Jush, et al, "Structure and Performance of the
HIPERLAN/2 Physical layer," 1999

Even though this article is related with HIPERLAN/2 PHY, but it will
give you some information about AMC, especially how AMC decide which
mode is proper according to SNR fed back from the receiver.

Regards,

DIFF

Aleen wrote:
> Thanks particlereddy,
>
> I found these value but I would like to make a correspondance between SNR
> and BER using curve. Is there any fixed value for BER for the SNR ? and
> can I consider wimax mobile just like wimax fix as the same thing in this
> issue ?
>
> thanks,
> ashlie
>
> PS: I saw your answer only this day, as I do not know how to follow my
> mail in this mailing list
>
>
>
>
> >hi aleen,
> > regarding this the best what you can do is you refer to
> >802.16E (mobile wimax) standard, there exists already a table of such
> >sort in that standard. if you dont find there, you can find it there at
> >(802.16-2004) standard or fixed wimax standard (802.16-2004's other
> >name).
> >Regarding BER, " there is compliance based limit that BER should be
> >this much "
> >
> >regards
> >particlereddy
> >
> >
> >
> >Aleen wrote:
> >> Hi all,
> >>
> >> I am new in WiMax and I intend to construct the table of modulation,
> SNR
> >> and BER..
> >> does anybody know how can I do it and by which equation ? I mean the
> table
> >> can be like the following:
> >>
> >> SNR modulation type data rate BER
> >> --- --------------- -------- ----
> >>
> >>
> >> thanks for any help,
> >> Ashlie
> >
> >