Patent ID: 9686757
Date: 2017-06-20
CPC Classifications: H03M,H04B,H04L,H04W

Claim:
1. A method performed by a wireless device, the method comprising: generating a High Efficiency (HE) Physical layer Protocol Data Units (PPDU) including a non-High Throughput Signal (L-SIG) field; and transmitting the HE PPDU, including: wherein the first set of extra tones include a first sequence of values, wherein first, second, third, and fourth values of the first sequence of values respectively correspond to Binary Phase Shift Keying (BPSK) constellation values of −1, −1, −1, and +1, and wherein the first set of extra tones are transmitted with non-zero power on −28th, −27th, 27th, and 28th subcarriers, relative to a center (zero) subcarrier, of a 20 MHz bandwidth of the HE PPDU.