Patent ID: 8681757
Filing Date: 2014-03-25
Classification: H03M,H04B,H04L,H04N,H04Q,H04W

Abstract:
1. A method of transmitting data in a wireless local area network, performed by a transmitter, the method comprising: mapping a legacy signal (L-SIG) field to a first binary phase shift keying (BPSK) constellation; mapping a first Very High Throughput Signal (VHT-SIG) field to the first BPSK constellation; mapping a second VHT-SIG field to a second BPSK constellation; transmitting the mapped L-SIG field in a first Orthogonal Frequency Division Multiplex (OFDM) symbol; transmitting the mapped first VHT-SIG field in a second OFDM symbol; and transmitting the mapped second VHT-SIG field in a third OFDM symbol, wherein the first OFDM symbol, the second OFDM symbol and the third OFDM symbol are consecutive, and wherein the second BPSK constellation is rotated by 90° counter-clockwise relative to the first BPSK constellation; and wherein the first VHT-SIG field includes an indicator indicating Single User-Multiple Input Multiple Output (SU-MIMO) transmission or multi user-MIMO (MU-MIMO) transmission; and the second VHT-SIG field includes a cyclic redundancy check (CRC) for the first VHT-SIG field and the second VHT-SIG field.