Patent ID: 9203683
Filing Date: 2015-12-01
Classification: H04L,H04W

Abstract:
1. A method comprising: receiving a plurality of data units each having a preamble, wherein the preamble of each data unit of the plurality of data units includes (i) a first preamble portion, and (ii) a second preamble portion following the first preamble portion; detecting a symbol constellation rotation of one or more orthogonal frequency division multiplexing (OFDM) symbols in the first preamble portion of each data unit; determining, based on each detected symbol constellation rotation, whether the preamble of the respective data unit conforms to a first format; when it is determined that the preamble of the respective data unit conforms to the first format, processing the second preamble portion of the respective data unit according to the first format; and when it is determined that the preamble of the respective data unit does not conform to the first format,