Patent ID: 9258178
Filing Date: 2016-02-09
CPC Classification: H04L

Claim Text:
1. A method for generating a physical layer (PHY) data unit for transmission via a communication channel, the method comprising: determining, using a pilot mapping function, pilot tone contribution sequence values for a first set of orthogonal frequency division multiplexing (OFDM) symbols, the first set of OFDM symbols to be included in a signal field of the data unit; determining, using the pilot mapping function, pilot tone contribution sequence values for a second set of OFDM symbols, the second set of OFDM symbols to be included in a data portion of the data unit; generating the first set of OFDM symbols to include pilot tones modulated based on the pilot tone contribution sequence values determined for the first set of OFDM symbols; generating the second set of OFDM symbols to include pilot tones modulated based on the pilot tone contribution sequence values determined for the second set of OFDM symbols; generating the signal field to include the first set of OFDM symbols; generating the data portion include the second set of OFDM symbols; generating a plurality of training fields to be included in the data unit; mapping the plurality of training fields to a plurality of spatial streams using a mapping matrix; mapping the pilot tones in the first set of OFDM symbols to the plurality of spatial streams using a column of the mapping matrix, wherein the column of the mapping matrix used to map pilot tones to the multiple spatial streams is the first column of the mapping matrix; mapping the pilot tones in the second set of OFDM symbols to the plurality of spatial streams using the column of the mapping matrix; and generating the data unit to include at least (i) the signal field, (ii) the data portion, and (iii) a set of one or more training fields, of the plurality of training fields, between the signal field and the data portion.