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Pls see 16e:
8.4.9.6 Zone boosting
----- Original Message -----
Sent: Monday, September 04, 2006 2:01
PM
Subject: Re: [STDS-802-16] Power
variation due to burst boosting.
greetings, I would like to potentially offer you another
difficulty. the power boosting is Sub-Channel based, meaning that for example
in DL PUSC {physical} adjacent Sub-Carriers from different Sub-Channels may
have different boosting as well resulting in apparent extreme power
differences not only in the same Sub-Frame but also at the same Symbol.
I would be glad to hear your comments about this as well.
On 9/4/06, Chao_Ming
Chang <Lepidus_Chang@mtk.com.tw >
wrote:
Hello all,
On Table 275 (page 371) of IEEE 802.16e-2005, it
specifies that boosting
with range
-12 dB to +9 dB is allowable for bursts. However, this would
introduce
a huge value on power
variable. For example, when N_FFT = 1024, a non-first PUSC zone
only uses one major group (i.e. 6
subchannels) with -12 dB burst boosting on every burst within the
zone,
its power would be -12 -
10log10(6/10) = -14.22 dB smaller than a non-first PUSC zone
employing 1/3 total data carriers. On the
other hand, for FUSC with +9 dB burst boosting on every burst
within the zone, its power is around 9 +
4.77 dB larger than the non-first PUSC zone employing 1/3 total
data carriers. When this kind of
PUSC zone using only one major group and with -12 dB burst boosting
coexists with the FUSC zone with +9 dB
burst boosting in the same down-link subframe, a total dynamic
range around 28 dB would happen
between these two zones.
My
questions are:
1. For base station
(BS) manufacturers, would they really allocate these two zones with extreme
power
variations within the same
downlink sub-frame such that +28 dB power variation happens in the same
sub-frame?
2. For base station (BS)
manufacturers, provided the answer to the first question is positive, would
they
transmit bursts to a mobile
station (MS) within a sub-frame such that the MS has to accommodate this 28
dB dynamic range?
Any comments
or suggestions are highly appreciated on this power variation issue.
Thanks.
Best regards,
Lepidus.
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