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Hi, I have a question regarding “Downlink subchannels
subcarrier allocation in PUSC”, section 8.4.6.1.2.1.1 of the 802.16
standard (i.e. document 802.16-2004 and the corrections in P80216_Cor1_D2).
While steps 1-3 consistently refer to clusters, which are made up of 2 pilot
and 12 data subcarriers, steps 4 & 5 suddenly switch to subchannels, which
are made up of 2 clusters. In step 4, it is stated that the same procedure in
section 8.4.6.1.2.2.2 (i.e. Eq. 111) is to be used for allocation of
subcarriers to subchannels, using either PermutationBase 12 or 8. These
permutations can only be used, if subchannels are considered, which are made up
of two clusters. My question is: How are clusters mapped to subchannels? Specially after
renumbering, two adjacent clusters can be mapped to clusters that are apart.
How is the Eq. 111 then used to map subcarriers to subchannels? I have
difficulty understanding the relationship between subchannels and clusters,
especially after renumbering the clusters. Thank you in advance. Vafa Vafa
Ghazi,
Ph.D.
Principal
Software
Engineer
SPW
Business
Unit
CoWare
Inc.
Email:
vafa@coware.com
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