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