# US 12,010,058 B2 · Facilitation of enhanced channel state information estimation for 5G or other next generation network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,010,058 B2 - Document ID: US12010058B2 - Status: Granted - Kind: B2 - Application number: 18/047,869 - Filed: 2022-10-19 - Published: 2023-03-02 - Granted: 2024-06-11 - Earliest claimed: 2020-11-30 - Assignees: AT&T Intellectual Property I, L.P. - Applicants: AT&T Intellectual Property I, L.P. - Inventors: Salam Akoum; Milap Majmundar - Web page: https://patentgrep.com/patent/US12010058B2 ## CPC - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) - H04L 25/0222: {Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency} - H04L 25/0224: {using sounding signals} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 1/0026: {Transmission of channel quality indication} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A delay doppler domain transformation can be used to estimate characteristics of a channel between a base station and a user equipment or alternatively, between the user equipment and another user equipment. Thus, the velocity and the distance position of the user equipment can be calculated. For example, a signal received in the time-frequency domain, can be converted to the delay doppler domain by the base station. In response to the conversion, the base station can estimate the velocity of the user equipment. The velocity can be utilized by various applications. For example, the velocity can be utilized to alert the other user equipment to the location or an anticipated location of the user equipment. ## Claims ### Claim 1 A method, comprising: estimating, by network equipment comprising a processor and based on a reference signal received from a user equipment, a channel response, associated with the user equipment, in a time-frequency domain, resulting in an estimated channel response; converting, by the network equipment, the estimated channel response from the time-frequency domain to a delay-doppler domain, resulting in a converted estimated channel response; and estimating, by the network equipment and based on the converted estimated channel response, a localization parameter associated with the user equipment, the localization parameter selected from a group of parameters comprising an estimated position of the user equipment, an estimated velocity associated with the user equipment, and an estimated angle of arrival of the reference signal from the user equipment. ### Claim 2 (depends on 1) The method of claim 1, wherein the reference signal is a time-frequency domain signal. ### Claim 3 (depends on 1) The method of claim 1, wherein the reference signal is a delay-doppler domain signal, and wherein the method further comprises: prior to the estimating of the channel response, converting, by the network equipment, the reference signal to a time-frequency domain signal. ### Claim 4 (depends on 3) The method of claim 3, wherein the converting of the reference signal comprises converting the reference signal to the time-frequency domain signal via a symplectic Fourier transform. ### Claim 5 (depends on 3) The method of claim 3, further comprising: facilitating, by the network equipment in response to the converting of the reference signal, spreading of the reference signal across orthogonal frequency division multiplexing symbols. ### Claim 6 (depends on 5) The method of claim 5, wherein the spreading is a first spreading, and wherein the method further comprises: facilitating, by the network equipment in further response to the converting of the reference signal, a second spreading of the reference signal across frequency subcarriers, wherein the first spreading and the second spreading result in an increased processing gain relative to a processing gain without the first spreading and the second spreading. ### Claim 7 (depends on 1) The method of claim 1, wherein the user equipment is a first user equipment, and wherein the method further comprises: facilitating, by the network equipment in response to the estimating of the localization parameter, transmitting the localization parameter to a second user equipment. ### Claim 8 (depends on 7) The method of claim 7, wherein the first user equipment is not the second user equipment. ### Claim 9 (depends on 1) The method of claim 1, wherein the network equipment comprises base station equipment. ### Claim 10 (depends on 1) The method of claim 1, wherein the user equipment is a first user equipment, and wherein the network equipment is a second user equipment that is not the first user equipment. ### Claim 11 Network equipment, comprising: a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising: estimating a channel response, in a time-frequency domain and associated with a user equipment, based on a reference signal received from the user equipment, resulting in an estimated channel response; converting the estimated channel response from the time-frequency domain to a delay-doppler domain, resulting in a converted channel response; and estimating localization parameters associated with the user equipment based on the converted channel response, wherein the localization parameters are selected from a group of parameters comprising an estimated position of the user equipment, an estimated velocity of the user equipment, and an estimated angle of arrival of the reference signal from the user equipment. ### Claim 12 (depends on 11) The network equipment of claim 11, wherein the reference signal is in the time-frequency domain. ### Claim 13 (depends on 11) The network equipment of claim 11, wherein the reference signal is in the delay-doppler domain, and wherein the operations further comprise: prior to the estimating of the channel response, converting the reference signal from the delay-doppler domain to the time-frequency domain. ### Claim 14 (depends on 13) The network equipment of claim 13, wherein the operations further comprise: in response to the converting of the reference signal, spreading the reference signal across orthogonal frequency division multiplexing symbols. ### Claim 15 (depends on 11) The network equipment of claim 11, wherein the user equipment is a first user equipment, and wherein the operations further comprise: transmitting, in response to the estimating of the localization parameters, the localization parameters to a second user equipment. ### Claim 16 A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising: based on a reference signal received from a user equipment, determining an estimated channel response, associated with the user equipment, in a time-frequency domain; converting the estimated channel response from the time-frequency domain to a delay-doppler domain, resulting in a converted channel response; and estimating, based on the converted channel response, at least one localization parameter associated with the user equipment, the at least one localization parameter comprising at least one of a first parameter representative of an estimated position of the user equipment, a second parameter representative of an estimated velocity of the user equipment, or a third parameter representative of an estimated angle of arrival of the reference signal from the user equipment. ### Claim 17 (depends on 16) The non-transitory machine-readable medium of claim 16, wherein the reference signal is in the time-frequency domain. ### Claim 18 (depends on 16) The non-transitory machine-readable medium of claim 16, wherein the reference signal is in the delay-doppler domain, and wherein the operations further comprise: prior to the determining of the estimated channel response, converting the reference signal from the delay-doppler domain to the time-frequency domain, resulting in a converted reference signal. ### Claim 19 (depends on 18) The non-transitory machine-readable medium of claim 18, wherein the operations further comprise: spreading the converted reference signal across orthogonal frequency division multiplexing symbols. ### Claim 20 (depends on 16) The non-transitory machine-readable medium of claim 16, wherein the user equipment is a first user equipment, and wherein the operations further comprise: in response to the estimating of the at least one localization parameter, transmitting the at least one localization parameter to a second user equipment.