Permutation Schemes

[raednoor]

hi guys....

please anybody know why (PUSC & FUSC) have same two configuration options in ATOLL??
(the two options are same in all things ,see the image, but when using them yields different results??)

which one used for segmentation???

what is the benefit from the other one??

please friends, it is very important.

thanks in advance....

[hari_2208]

Permutation zone: It consists of OFDMA symbols that use the same
permutation scheme (i.e., PUSC, FUSC or AMC). the first zone in the
DL subframe is essentially PUSC. The maximum number
of downlink zones in one downlink subframe is eight.

FUSC- (DL only) High Throughput , all of the subchannels are allocated to the transmitter
PUSC- Reduced interference as subcarrier deived in the 3 sectors
AMC- Improved performance


•Frequency diverse (FD) resource allocation
–Full Usage of Sub-channels (FUSC)
–Partial Usage of Sub-Channels (PUSC) (mandatory mode)

•Frequency selective (FS) resource allocation
–‘adjacent’ or ‘Band AMC’ mode
–higher throughput by taking constructive fade in frequency


FUSC -

+ In this type of subcarrier distribution, all of the subchannels are allocated to the transmitter. That is why it is called full usage of subchannel

+
One slot of FUSC DL is one OFDM symbols by one subchannel ,while one FUSC DL subchannel comprises 48 data subcarriers. With 2048-
FFT, there are 32 subchannels in total. Out of 2048, there are 173 left guard subcarriers, 172 right guard subcarriers, 1536 data subcarriers, 166 pilot sub-carriers and one DC subcarrier. Out of 166, 24 Pilot subcarriers are FIxed . The rest 142 Pilot subcarriers are variable and they change
from one FUSC symbol (starting from 0) to another.

PUSC-

+

In this type of subcarrier distribution, some of the subchannels are allocated to the transmitter. That is why it is called partial usage of subchannel.

+
One slot of PUSC DL is two OFDM symbols by one subchannel ,
while one PUSC DL subchannel comprises 24 data subcarriers. Out of 2048,
there are 184 left guard subcarriers, 183 right guard subcarriers, 1440 data subcarriers, 240 pilot subcarriers and one DC subcarrier.


AMC-


In this type of subcarrier permutation, subchannels are composed of con-
tiguous subcarriers. It has better channel estimation capabilities and allows adaptive modulation and coding