Patent ID: 9294164
Filing Date: 2016-03-22
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method for generating a preamble of a data unit for transmission via a communication channel, the method comprising: including a first indication of a first number of spatial or space-time streams in a first sub-field of a first field of the preamble, wherein the first number of spatial or space-time streams corresponds to transmission of the data unit to a first receiver; including one or more training sequences in a second field of the preamble; including in a second sub-field of the first field an indication of whether space-time block coding is to be used in transmitting the data unit via the communication channel; when the data unit corresponds to only one receiver, when the data unit corresponds to a group of multiple receivers, formatting the preamble such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted.