US Patent No. 10,666,405

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL USING TRAINING SIGNAL


Patent No. 10,666,405
Issue Date May 26, 2020
Title Wireless Communication Method And Wireless Communication Terminal Using Training Signal
Inventorship Juhyung Son, Gyeonggi-do (KR)
Jinsam Kwak, Gyeonggi-do (KR)
Geonjung Ko, Gyeonggi-do (KR)
Assignee WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-Do (KR) SK TELE...

Claim of US Patent No. 10,666,405

1. A wireless communication terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to, in uplink (UL) orthogonal frequency division multiple access (OFDMA) transmission:
transmit, by using the transceiver, a first one or more fields through a frequency band to a base wireless communication terminal, wherein a preamble of a physical frame includes the first one or more fields to be transmitted through the frequency band and a second one or more fields to be transmitted through a sub-frequency band of the frequency band,
adjust a magnitude of a training signal corresponding to the sub-frequency band based on a value divided by a number of subcarriers of the training signal corresponding to the sub-frequency band, wherein a plurality of training signals configured to be transmitted through an entire frequency band allocated for the UL OFDMA transmission include the training signal corresponding to the sub-frequency band and a training signal corresponding to a sub-frequency band which is not allocated to any wireless communication terminal,
transmit, by using the transceiver, the second one or more fields through the sub-frequency band to the base wireless communication terminal, wherein the second one or more fields include a field including the training signal corresponding to the sub-frequency band and not including the training signal corresponding to the sub-frequency band which is not allocated to any wireless communication terminal, and
transmit data through the sub-frequency band to the base wireless communication terminal,
wherein the sub-frequency band is allocated, by the base wireless communication terminal, to the wireless communication terminal for a transmission of the data,
wherein the training signal corresponding to the sub-frequency band is configured to be used, by the base wireless communication terminal, for automatic gain control for receiving the data from the wireless communication terminal, and
wherein the training signal corresponding to the sub-frequency band which is not allocated to any wireless communication terminal is not transmitted by any wireless communication terminal in the UL OFDMA transmission.