SWRU423A July 2015 – May 2016 WL1801MOD , WL1805MOD , WL1807MOD , WL1831MOD , WL1835MOD , WL1837MOD
The modulation scheme used in 802.11g is orthogonal frequency-division multiplexing (OFDM), copied from 802.11a with data rates of 6, 9, 12, 18, 24, 36, 48, and 54 Mbit/s.
OFDM is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large number of closely-spaced orthogonal subcarrier signals are used to carry data on several parallel data streams or channels. Each subcarrier is modulated with a conventional modulation scheme (such as quadrature amplitude modulation or phase-shift keying) at a low symbol rate, maintaining total data rates similar to conventional single-carrier modulation schemes in the same bandwidth.
Data Rate [Mbps] | Modulation | Code rate |
---|---|---|
6 | BPSK | ½ |
9 | BPSK | ¾ |
12 | QPSK | ½ |
18 | QPSK | ¾ |
24 | QAM-16 | ½ |
36 | QAM-16 | ¾ |
48 | QAM-64 | ½ |
54 | QAM-64 | ¾ |