US Patent No. 10,368,391

MIDAMBLE FOR WLAN PHY PACKETS


Patent No. 10,368,391
Issue Date July 30, 2019
Title Midamble For Wlan Phy Packets
Inventorship Hongyuan Zhang, Fremont, CA (US)
Rohit U. Nabar, Sunnyvale, CA (US)
Sudhir Srinivasa, Campbell, CA (US)
Raja Banerjea, Sunnyvale, CA (US)
Yong Liu, Campbell, CA (US)
Assignee Marvell International Ltd., Hamilton (BM)

Claim of US Patent No. 10,368,391

1. A method, comprising:generating, at a communication device, a first physical layer (PHY) data unit that includes a first PHY preamble and does not include any PHY midambles, including generating the first PHY preamble to include an indicator that the first PHY data unit does not include any PHY midambles, wherein the first PHY data unit includes a first plurality of orthogonal frequency division multiplexing (OFDM) symbols;
transmitting, by the communication device, the first PHY data unit via a wireless communication channel;
generating, at the communication device, a second PHY data unit that includes a second PHY preamble and one or more PHY midambles, wherein the second PHY data unit includes a second plurality of OFDM symbols, wherein generating the second PHY data unit includes:
generating the second PHY preamble of the second PHY data unit to include i) a signal field having a subfield that indicates that the second PHY data unit includes one or more PHY midambles, ii) a short training field (STF) for automatic gain control (AGC) training and synchronization at a receiver, and iii) one or more long training fields (LTFs) for determining a channel estimate at the receiver,
generating a data payload of the second PHY data unit having i) a set of OFDM symbols, among the second plurality of OFDM symbols, and ii) one or more PHY midambles, wherein each of the one or more PHY midambles includes one or more LTFs for determining an updated channel estimate; and
transmitting, by the communication device, the second PHY data unit via the wireless communication channel.