Physical layer frame format for long range WLAN
AssigneeMarvell World Trade Ltd.
InventorsHongyuan Zhang, Rohit U. Nabar, Raja Banerjea, Yong Liu
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Abstract
In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first preamble portion and a data portion of the data unit is generated. The first preamble portion includes one or more long training fields. The first preamble portion and the data portion are modulated using a plurality of orthogonal frequency division multiplexing (OFDM) symbols. Symbol duration of each OFDM symbol is at least 8 μs. The data unit is generated to include the plurality of OFDM symbols.
Claims18
A method for generating a physical layer (PHY) data unit for transmission via a communication channel, wherein the communication channel includes a plurality of spatial streams, the method comprising:
- generating a first preamble portion of the PHY data unit, wherein the first preamble portion includes one or more long training fields, and wherein at least one of the one or more long training fields includes at least pilot tones and non-pilot tones;
- generating a data portion of the PHY data unit;
- modulating the first preamble portion and the data portion to generate a plurality of orthogonal frequency division multiplexing (OFDM) symbols, wherein symbol duration of each OFDM symbol of the plurality of OFDM symbols is at least 8 μs;
- generating the PHY data unit to include the plurality of OFDM symbols;
- mapping the non-pilot tones to the plurality of spatial streams using a mapping matrix;
- and
- mapping the pilot tones to the plurality of spatial streams using a column of the mapping matrix.
An apparatus comprising:
- a medium access control (MAC) processing unit configured to perform medium access control functions;
- and
- a physical layer (PHY) processing unit, coupled to the MAC processing unit, the PHY processing unit configured to:
- generate a first preamble portion of a PHY data unit, wherein the first preamble portion includes one or more long training fields, and wherein at least one of the one or more long training fields includes at least pilot tones and non-pilot tones,
- generate a data portion of the PHY data unit,
- modulate the first preamble portion and the data portion using a plurality of orthogonal frequency division multiplexing (OFDM) symbols, wherein symbol duration of each OFDM symbol of the plurality of OFDM symbols is at least 8 μs,
- generate the PHY data unit to include the plurality of OFDM symbols,
- map the non-pilot tones to multiple spatial streams using a mapping matrix, and
- map the pilot tones to multiple spatial streams using a column of the mapping matrix.
Dependencies are inferred from the claim text.