Wlan Frame Structure; Short Plcp Ppdu Frame Format; Long Plcp Ppdu Frame Format - Samsung OfficeServ 500 Service Manual

OfficeServ 500 Wireless LAN Service Manual/Ed.00
4

WLAN Frame Structure

4.1

Short PLCP PPDU Frame Format

Scrambled Zero's
ShortSYNC
58 bits
ShortPLCP Preamble
72 bits at 1 Mbit/s
4.2

Long PLCP PPDU Frame Format

Scrambled One's
SYNC
128 bits
PLCP Preamble
© SAMSUNG Electronics Co., Ltd.
Backward SFD
ShortSFD
16 bits
DBPSK
96μs
Figure A.3 Short PLCP PPDU Frame Format of WLAN
SFD
SIGNAL
16 bits
8 bits
PLCP Header
144 bits
192μs
PPDU
Figure A.4 Long PLCP PPDU Frame Format of WLAN
Annex A. WLAN(802.11b/DSSS) Specifications
SIGNAL SERVICE
8 bits 8 bits
2 Mbit/s
ShortPLCP Header
48 bits at 2 Mbit/s Variable at 2, 5.5 or 11 Mbit/s
PPDU
LENGTH
SERVICE
16 bits
8 bits
PSDU
48 bits
LENGTH CRC
16 bits 16 bits
PSDU
CRC
1 Mbit/s D BPSK
16 bits
1 DBPSK
2 DQPSK
5.5 or 11Mbit/s
Annex A-7