The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 2020
Filed:
Sep. 20, 2018
Qualcomm Incorporated, San Diego, CA (US);
Lin Yang, San Diego, CA (US);
Bin Tian, San Diego, CA (US);
Jialing Li Chen, San Diego, CA (US);
Louay Jalloul, San Jose, CA (US);
Vincent Knowles Jones, IV, Redwood, CA (US);
Ning Zhang, Saratoga, CA (US);
Chi-Lin Su, Zhubei, TW;
Ahmad Abdulrahman Mohammed, San Jose, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Methods, systems, and devices for wireless communication are described. In some systems (e.g., Wi-Fi systems), a transmitting device such as an access point (AP) or mobile station (STA), may identify a number of spatial streams for a data transmission that is less than a number of transmit antennas, and may transmit a packet over a channel. In a first implementation, the packet may be formatted in a multi-user frame format, with a number of long training field (LTF) symbols equal to the number of transmit antennas. In a second implementation, the packet may be a null data packet (NDP), and the device may transmit a separate data packet. In a third implementation, the packet may be formatted in single-user frame format with a modified LTF. A receiving device may receive the packet, and may perform channel estimation and power amplifier (PA) distortion cancellation based on the received packet.