Patent ID: 11949628
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. The first wireless device of claim 17, wherein:
the first subcarrier structure comprises:
a direct current (DC) subcarrier;
a first set of two or more data subcarriers;
a first set of two or more pilot subcarriers with one of the two or more data subcarriers between each of the two or more pilot subcarriers and the DC subcarrier; and
a first quadrature amplitude modulation (QAM) scheme; and

the second subcarrier structure comprises:
the DC subcarrier;
a second set of three or more data subcarriers;
a second set of two or more pilot subcarriers with two of the three or more data subcarriers between each of the two or more pilot subcarriers and the DC subcarrier; and
a second QAM scheme.