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Hybrid MU-MIMO spatial mapping using both explicit sounding and crosstalk tracking in a wireless local area network

專利號(hào)
US10868589B2
公開日期
2020-12-15
申請人
Quantenna Communications, Inc.（US CA San Jose）
發(fā)明人
Sigurd Schelstraete
IPC分類
H04B7/0452; H04B7/0456; H04L5/00; H04B17/336; H04L25/02; H04B7/0417; H04L12/26; H04W84/12; H04W88/08
技術(shù)領(lǐng)域
sounding,mu,mimo,wap,crosstalk,downlink,packet,channel,precode,precoding
地域： CA CA San Jose

摘要

Systems and methods for a wireless station supporting wireless communications with an associated wireless access point (WAP) on a wireless local area network (WLAN) where the wireless station can include hardware processing circuitry to perform hybrid spatial mapping feedback operations for multi-user (MU) multiple-input multiple-output (MIMO) downlinks from the WAP to a group of associated stations. An exemplary implementation includes a channel estimation circuit to determine a communication channel responsive to an explicit sounding from the WAP, and to transmit channel sounding feedback to the WAP indicating the determined communication channel; and a crosstalk tracking circuit to determine an amount of crosstalk from portions of a downlink MU-MIMO communication packet targeted for other stations in the group of associated stations, and to transmit crosstalk feedback to the WAP as to the determined amount of crosstalk.

說明書

In another embodiment of the invention a complementary wireless station is disclosed with hardware processing circuitry to perform hybrid spatial mapping feedback operations for multi-user (MU) multiple-input multiple-output (MIMO) downlinks from the WAP to a group of associated stations, and including in such circuitry a channel estimation circuit and a crosstalk estimation circuit. The channel estimation circuit is responsive to an explicit sounding received from the WAP to determine a communication channel associated therewith and to transmit feedback to the WAP as to the determined communication channel. The crosstalk estimation circuit is responsive to receipt of a MU-MIMO downlink communication packet from the WAP to determine an amount of crosstalk from portions of the downlink MU-MIMO communication packet targeted for other stations in the group and to transmit feedback to the WAP as to the determined crosstalk.

Associated methods are also claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features and advantages of the present invention will become more apparent to those skilled in the art from the following detailed description in conjunction with the appended drawings in which:

FIG. 1 is a timeline of a Prior Art MU-MIMO downlink showing sounding overhead and downlink portions;

FIGS. 2A-2D are a representative Prior Art channel graph, a Prior Art WLAN timing diagram including soundings, a Prior Art detailed explicit sounding timing diagram, and a Prior Art packet diagram of a WLAN packets including the sounding field;

權(quán)利要求

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