Methods and apparatus for WLAN transmission
First Claim
1. 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, whereinthe 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, andthe 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.
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Abstract
In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, 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 are provided. The first set of MCSs correspond to a first channel bandwidth and the second set of MCSs correspond to a second channel bandwidth, and the first set of MCSs is different than the second set of MCSs. An MCS is selected from the first set of MCSs when the PHY data unit is to be transmitted using a channel having the first channel bandwidth, and the MCS is selected from the second set of MCSs when the PHY data unit is to be transmitted using a channel having the second channel bandwidth. Information bits are encoded using the number of encoders and according to the selected MCS, and the encoded information bits are parsed into the number of spatial streams. The encoded information bits are modulated according to the MCS, and a plurality of OFDM symbols are formed based on the modulated encoded information bits.
199 Citations
12 Claims
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1. A method for generating a physical layer (PHY) data unit for transmission via a communication channel, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A physical layer (PHY) apparatus for generating a PHY data unit for transmission via a communication channel, the PHY apparatus comprising:
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a memory to store indicators of 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; wherein the PHY apparatus is configured to select 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; wherein the PHY apparatus further comprises; a plurality of encoders to encode information bits according to the number of encoders and according to the selected MCS; a stream parser to parse the information bits into the number of spatial streams; and a plurality of modulators to modulate the encoded information bits according to the selected MCS; wherein the PHY apparatus is configured to form a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols based on the modulated encoded information bits. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification