Dear Hongmei
Sun,
The reason of the following description exist is for
easier understanding the concept to the band.
“AMC subchannel consists of 6 contiguous
bins in a same band."
And because the statement does not restrict the use of
6 contiguous bins within one symbol, one may use 4 bin in first symbol and the other 2 bin in the second
symbol. If someone uses the abbreviation on this structure as “4:2” structures of AMC
subchannel. Then the possible alternate definition
of the AMC subchannel could be 4:2 or 3:3 or 2:4 or 1:1:1:1:1:1. etc.
Maybe the word “contiguous” give some wrong sense of
instincts. If just forget the nuance of the word “contiguous” as continuous in
frequency domain, just read it as Contiguous bin in Band. Then we may bend the
thoughts as well as the words.
And also please just do not confuse by the concept of
the Band. It just gives you the concept of the AMC subchannelization. And it is not used for BAND AMC
MAPPIING procedure by itself. The mapping of the data PDU is aligned only with
definition of subchannel.
I still do not see any mis-description in the original statement in the
specs.
And regarding to the DL PUSC, I think there are some
mis-understanding when you read the spec., it would
be appreciated if you can revisit the spec and read it carefully. I will do it
too. If I found the same problems, I will comeback with the answer. But
currently, I do not found any fault in the spec.
Hope this may help U.
Panyuh Joo
From:
owner-stds-802-16@listserv.ieee.org
[mailto:owner-stds-802-16@listserv.ieee.org] On Behalf Of Sun, Hongmei
Sent: Wednesday, November 03, 2004
4:07
PM
To:
STDS-802-16@listserv.ieee.org
Subject: Re: [STDS-802-16] Regarding Band
AMC--Mapping
sorry, but I'm still
confused about this even after your
explanation.
As you said, 4 Bins
make one Band, and 6 Bins make one subchannel. So doesn't this hint
that each AMC subchannel must exist across Band? (My understanding
is: for each subchannel: 4 bins are from 1st Band, the other 2 bins are
from 2nd Band. Of course, these 6 bins are
contiguous.)
In addition,from my
understanding, maybe PUSC DL permutation scheme is an exception case in
aspect of subchannel size, where each subchannel has 24 tones but not 48
tones.
Pls feel free to
revise me if my understanding is not right.
From:
owner-stds-802-16@listserv.ieee.org
[mailto:owner-stds-802-16@listserv.ieee.org] On Behalf Of Panyuh Joo
Sent: Wednesday, November 03, 2004
2:31
PM
To:
STDS-802-16@listserv.ieee.org
Subject: Re: [STDS-802-16] Regarding Band
AMC--Mapping
Hi, Varma
and All,
Because one
Band only got 4bins and 4 Bin only can make 32 data subcarriers + 4 pilot
subcarriers. Any subchannel shoud have at least 48 tones(subcarriers),
if we do not restrict the definition of AMC subchannel into
one band. than any AMC subchannel can be exist accross the Band.
So, the
meaning of "AMC subchannel consists
of 6 contiguous bins in a same band" ==>
one AMC subchannel should be confined with in the same band. This definition
would help the system exploits the Multi user diversity.
I hope this explanation would help you.
Panyuh
Joo
|
--------
|
Panyuh
Joo Ph.D.
Global Standards &
Research Team
Telecommunication
R&D Center
Telecommunication Network
SAMSUNG
ELECTRONICS CO., LTD
TEL:
82-31-279-5096
FAX:
82-31-279-5130
Mobile :
82-16-9530-5096
panyuh@samsung.com |
------- Original Message -------
Sender : varma
indukuri<varma.ivs@gmail.com>
Date : 2004-11-03
14:46
Title : [STDS-802-16] Regarding Band
AMC--Mapping
Hi all,
Section8.4.6.3(P80216-REVd_D5):: Optional permutations for AAS and AMC
subchannels.
A bin was defined as the set of adjacent 9 subcarriers with pilot in
the middle as in Fig:238. But I couldn't understand the meaning of
"A group of 4 rows of bins is called a band. AMC subchannel consists
of 6 contiguous bins in a same band."?????
Can any one help me in this regard.
Regards
varma ivs