Patent ID: 11863359
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method comprising:
sending, by a first device to a second device, first data using a digital multi-carrier modulation scheme that defines a set of data subcarriers in a wireless channel, wherein a first data subcarrier and a second data subcarrier of the set of data subcarriers operate at a first amplitude value;
receiving, by the first device from the second device, second data comprising a first value indicative of a first received signal power level corresponding to the first data subcarrier and a second value indicative of a second received signal power level corresponding to the second data subcarrier;
determining, by the first device, a second amplitude value for the first data subcarrier based on the first value;
generating a modulation symbol using input bits of third data;
converting the modulation symbol into discrete time-domain data, wherein the first amplitude value is increased to a second amplitude value for the first data subcarrier before the converting;
converting the discrete time-domain data into analog data;
modulating the analog data onto radio frequency (RF) signals; and
sending, by the first device to the second device using the RF signals, the third data using the digital multi-carrier modulation scheme in which the first data subcarrier operates at the second amplitude value and the second data subcarrier operates at the first amplitude value.