US 12,149,386 B2
Method and apparatus for determining a channel state of an impaired data channel
Ronny Hadani, San Jose, CA (US); and Shlomo Selim Rakib, San Jose, CA (US)
Assigned to Cohere Technologies, Inc., San Jose, CA (US)
Filed by Cohere Technologies, Inc., San Jose, CA (US)
Filed on Apr. 26, 2023, as Appl. No. 18/307,436.
Application 18/307,436 is a continuation of application No. 16/946,119, filed on Jun. 5, 2020, granted, now 11,646,913.
Application 16/946,119 is a continuation of application No. 16/041,779, filed on Jul. 21, 2018, granted, now 10,681,568, issued on Jun. 9, 2020.
Application 16/041,779 is a continuation in part of application No. 15/604,072, filed on May 24, 2017, granted, now 10,034,184, issued on Jul. 24, 2018.
Application 15/604,072 is a continuation of application No. 14/805,407, filed on Jul. 21, 2015, granted, now 9,668,148, issued on May 30, 2017.
Application 14/805,407 is a continuation in part of application No. 14/583,911, filed on Dec. 29, 2014, granted, now 9,444,514, issued on Sep. 13, 2016.
Application 14/583,911 is a continuation in part of application No. 14/341,820, filed on Jul. 27, 2014, granted, now 9,083,483, issued on Jul. 14, 2015.
Application 14/341,820 is a continuation of application No. 13/117,119, filed on May 26, 2011, granted, now 8,879,378, issued on Nov. 4, 2014.
Application 14/583,911 is a continuation in part of application No. 13/430,690, filed on Mar. 27, 2012, granted, now 9,083,595, issued on Jul. 14, 2015.
Application 13/430,690 is a continuation in part of application No. 13/117,119, filed on May 26, 2011, granted, now 8,879,378, issued on Nov. 4, 2014.
Application 14/583,911 is a continuation in part of application No. 13/927,091, filed on Jun. 25, 2013, granted, now 9,130,638, issued on Sep. 8, 2015.
Claims priority of provisional application 62/027,231, filed on Jul. 21, 2014.
Claims priority of provisional application 61/664,020, filed on Jun. 25, 2012.
Claims priority of provisional application 61/615,884, filed on Mar. 26, 2012.
Claims priority of provisional application 61/349,619, filed on May 28, 2010.
Prior Publication US 2023/0327919 A1, Oct. 12, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 25/02 (2006.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04W 24/02 (2009.01); H04W 72/54 (2023.01); H04B 7/10 (2017.01)
CPC H04L 25/0226 (2013.01) [H04L 5/0007 (2013.01); H04L 5/0023 (2013.01); H04L 5/0048 (2013.01); H04L 5/0051 (2013.01); H04L 25/022 (2013.01); H04L 25/0224 (2013.01); H04L 27/261 (2013.01); H04L 27/2613 (2013.01); H04L 27/26134 (2021.01); H04L 27/2639 (2013.01); H04W 24/02 (2013.01); H04W 72/54 (2023.01); H04B 7/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of determining a two-dimensional (2D) channel state of an impaired data channel connecting at least one transmitter and at least one receiver, the impaired data channel including at least one reflector having a reflector location, a reflector frequency shift, and at least one coefficient of reflection, the method comprising:
transmitting, by the at least one transmitter, a plurality of Orthogonal Time Frequency Space (OTFS) pilot symbols Ppt,pf as OTFS pilot symbol waveform bursts Ppt,pfWp(pt, pf) over a plurality of combinations of times pt and frequencies pf, where each of the times pt and the frequencies pf are unique pilot time-frequency coordinates selected from a OTFS time-frequency grid, wherein the OTFS pilot symbol waveform bursts Ppt,pfWp(pt, pf) are mutually orthogonal waveform bursts derived from cyclically time and frequency shifted versions of a common OTFS pilot basis waveform Wp,
distorting the OTFS pilot symbol waveform bursts into channel-convoluted OTFS pilot bursts based on the impaired data channel, wherein the channel-convoluted OTFS pilot bursts comprise a combination of direct OTFS pilot bursts and replica OTFS pilot bursts, and wherein:
the direct OTFS pilot bursts comprise the plurality of OTFS pilot symbols; and
the replica OTFS pilot bursts comprise direct OTFS pilot bursts reflected off the at least one reflector before reaching the at least one receiver; and
producing direct OTFS waveform bursts based on the reflected direct OTFS pilot bursts, the direct OTFS waveform bursts being further reflector time-delayed and reflector frequency-shifted at the at least one receiver.