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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
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

( 5 )
where N0 is power of the additive noise. Throughout the simulations, we'll compare the results with “ideal” precoding. With this, we mean a precoding where the precoding matrices are always up to date with the latest channel information. This would be equivalent to performing a sounding right before the transmission of the MU packet. Note that there will still be a small amount of change since there is a small time lag between the sounding and the actual transmission, but it is minimal. The channels used in the simulation are complex-valued Gaussian channels.

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