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
WiMax data rate
Started by ●November 12, 2006
Reply by ●November 13, 20062006-11-13
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
Reply by ●November 27, 20062006-11-27
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 thetable>> can be like the following: >> >> SNR modulation type data rate BER >> --- --------------- -------- ---- >> >> >> thanks for any help, >> Ashlie > >
Reply by ●November 28, 20062006-11-28
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 > > > >