[STDS-802-16] AW: [STDS-802-16] FCH duplication in 1024-point FFT mode
Dear Lepidus,
to my understanding Case II: b0, b1, ..., b22, b23, b0, b1, ..., b22, b23 is the
right one.
See that duplication of the 24 bit as an additional repetition coding
gain in the system for FCH.
Kind Regards
Juergen Otterbach
Von: Chao_Ming Chang
[mailto:Lepidus_Chang@MTK.COM.TW]
Gesendet: Thursday, June 15, 2006
1:58 PM
An: STDS-802-16@listserv.ieee.org
Betreff:
[STDS-802-16] FCH duplication in 1024-point FFT mode
Hello all,
In page 502 of [802.16-2004], the paragraph before
8.4.4.4, it said "Before being mapped to the FCH, the 24-bit
DL frame Prefix shall be duplicated to form a 48-bit
block, ....". But how does it duplicate exactly?
For example, if the 24 bits content in OFDMA downlink
frame prefix format is: b0, b1, b2, ...., b23,
the duplicated 48 bits are:
Case
I: b0, b0, b1, b1, ...., b22, b22, b23, b23 or
Case II: b0, b1, ..., b22, b23, b0, b1, ..., b22,
b23?
Any comments are appreciated.
Best regards,
Lepidus.
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