Patent ID: 8724720

Claim:
A method for generating a physical layer (PHY) data unit for transmission via a communication channel, the method comprising: providing a first set of modulation coding schemes (MCSs) and a second set of MCSs that correspond to a number of spatial streams and a number of encoders, wherein the first set of MCSs correspond to a first channel bandwidth and the second set of MCSs correspond to a second channel bandwidth, the first set of MCSs is different than the second set of MCSs, the first set of MCSs excludes MCSs that will result in a padding-related constraint not being met when the first channel bandwidth is to be used, and the second set of MCSs excludes MCSs that will result in the padding-related constraint not being met when the second channel bandwidth is to be used; selecting an MCS i) from the first set of MCSs when the PHY data unit is to be transmitted using a channel having the first channel bandwidth, and ii) from the second set of MCSs when the PHY data unit is to be transmitted using a channel having the second channel bandwidth; encoding information bits using the number of encoders and according to the selected MCS; parsing the encoded information bits into the number of spatial streams; modulating the encoded information bits according to the selected MCS; and forming a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols based on the modulated encoded information bits.