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View Full Version : AMR WB used in GSM



RF engineer
2010-02-13, 02:06 AM
hi
I would like to ask if yu used AMR WB in GSM and have any technical doc to be shared
BR
RF

ghassen
2010-02-13, 03:53 AM
hi
I would like to ask if yu used AMR WB in GSM and have any technical doc to be shared
BR
RF

widedand AMR is a feature introduced with siemens equipment since BR10 and you need a license to deploy it for the doc at this moment i dont have any doc regarding this topic

marko
2010-02-13, 04:33 AM
widedand AMR is a feature introduced with siemens equipment since BR10 and you need a license to deploy it for the doc at this moment i dont have any doc regarding this topic

more vendors have wb-amr, not just siemens. the transcoder has to have special boards or software to decode the wb-amr coded voice.

ghassen
2010-02-13, 04:34 AM
more vendors have wb-amr, not just siemens. the transcoder has to have special boards or software to decode the wb-amr coded voice.

i'm only trained for siemens equipment the other vendors i really don't know

RF engineer
2010-02-13, 05:01 AM
so as i understood from you it is possible to used and how can be higher codec be set in the system and do all mobile support AMR WB and i heard this one not support for Half rate so how can have capacity gain may be this type of AMR is good for 3G than 2G

ghassen
2010-02-13, 05:14 AM
3 gpp introduced wideband amr codec for speech quality improvement:
- extension of th speech bandwith carried on a radio channel from 8khz to 16khz
-offer codec with 5 source bit rates :
+ 3*GMSK fullrate codec modes
+ 5* 8-psk full rate mode
+ 3* 8-psk half rate mode
http://free0.hiboox.com/images/0610/6723275a0d61e6351eab04bf3ab39aea.jpg (http://www.hiboox.fr/go/images/divers/capturer,6723275a0d61e6351eab04bf3ab39aea.jpg.html)
http://free0.hiboox.com/images/0610/e5cd00a5bf253dab3b19e0868e81ee62.jpg (http://www.hiboox.fr/go/images/divers/capturer,e5cd00a5bf253dab3b19e0868e81ee62.jpg.html)

RF engineer
2010-02-13, 05:19 AM
hi ghassan can you please explain bit more especially for the last 3 points

ghassen
2010-02-13, 05:25 AM
hi ghassan can you please explain bit more especially for the last 3 points

i have updated the post

RF engineer
2010-02-13, 05:34 AM
i have updated the post

thanks alot it is possible to have this doc

ghassen
2010-02-13, 05:35 AM
thanks alot it is possible to have this doc

print the screen hahahahahahahahahahah :lol:lol:lol

RF engineer
2010-02-13, 05:46 AM
:L thanks for support but i asked if you post complete doc that can give more idea about AMR WB:L