US 12,068,846 B2
Multiple access using orthogonal time frequency space modulation
Ronny Hadani, Santa Clara, CA (US); Anton Monk, Santa Clara, CA (US); Shlomo Selim Rakib, Santa Clara, CA (US); and Michail Tsatsanis, Santa Clara, CA (US)
Assigned to Cohere Technologies, Inc., San Jose, CA (US)
Filed by Cohere Technologies, Inc., Santa Clara, CA (US)
Filed on Jul. 19, 2021, as Appl. No. 17/443,004.
Application 17/443,004 is a continuation of application No. 15/758,322, granted, now 11,070,329, previously published as PCT/US2016/050579, filed on Sep. 7, 2016.
Claims priority of provisional application 62/215,219, filed on Sep. 8, 2015.
Claims priority of provisional application 62/215,127, filed on Sep. 7, 2015.
Prior Publication US 2021/0351880 A1, Nov. 11, 2021
Int. Cl. H04L 5/00 (2006.01); H04L 1/00 (2006.01); H04L 27/26 (2006.01); H04B 7/06 (2006.01); H04L 25/03 (2006.01)
CPC H04L 1/0023 (2013.01) [H04L 5/0007 (2013.01); H04L 5/0023 (2013.01); H04L 27/2639 (2013.01); H04L 27/2697 (2013.01); H04B 7/06 (2013.01); H04L 1/0071 (2013.01); H04L 25/03834 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A signal reception method, implemented at a receiver apparatus, comprising:
receiving a signal transmission comprising at least two component signals multiplexed together;
wherein the at least two component signals include a first component signal carrying user data for the receiver apparatus and a second component signal carrying user data for another receiver apparatus or a reference signal transmission;
transforming, using an orthogonal transform, the signal transmission into a post-processing format, wherein the post-processing format represents the at least two component signals in a two-dimensional time-frequency plane;
recovering, by performing an orthogonal time frequency space transformation, a multiplexed signal in a two-dimensional delay-Doppler plane, from the post-processing format, wherein the two-dimensional delay-Doppler plane comprises a lattice with lattice points defined as (m/Δf, n/T), wherein 1/Δf is a maximum delay representable on the two-dimensional delay-Doppler plane, 1/T is a maximum Doppler representable on the two-dimensional delay-Doppler plane, and m and n are integers; and
demultiplexing the multiplexed signal to recover one of the at least two component signals.