US 10,368,391 B1
Midamble for WLAN PHY packets
Hongyuan Zhang, Fremont, CA (US); Rohit U. Nabar, Sunnyvale, CA (US); Sudhir Srinivasa, Campbell, CA (US); Raja Banerjea, Sunnyvale, CA (US); and Yong Liu, Campbell, CA (US)
Assigned to Marvell International Ltd., Hamilton (BM)
Filed by Marvell International Ltd., Hamilton (BM)
Filed on Sep. 3, 2018, as Appl. No. 16/120,393.
Application 16/120,393 is a continuation of application No. 15/645,335, filed on Jul. 10, 2017, granted, now 10,070,482.
Application 15/645,335 is a continuation of application No. 13/689,183, filed on Nov. 29, 2012, granted, now 9,706,599, issued on Jul. 11, 2017.
Application 13/689,183 is a continuation in part of application No. 12/841,772, filed on Jul. 22, 2010, granted, now 8,462,863, issued on Jun. 11, 2013.
Claims priority of provisional application 61/585,565, filed on Jan. 11, 2012.
Claims priority of provisional application 61/576,516, filed on Dec. 16, 2011.
Claims priority of provisional application 61/565,316, filed on Nov. 30, 2011.
Claims priority of provisional application 61/228,084, filed on Jul. 23, 2009.
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 84/12 (2009.01); H04J 11/00 (2006.01); H04L 27/26 (2006.01)
CPC H04W 84/12 (2013.01) [H04J 11/0026 (2013.01); H04L 27/2602 (2013.01); H04L 27/2613 (2013.01)] 26 Claims
OG exemplary drawing
 
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.