# US 10,771,289 B2 · Multi-transmitter channel estimation for a time varying channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,289 B2 - Document ID: US10771289B2 - Status: Granted - Kind: B2 - Application number: 16/087,822 - Filed: 2017-03-24 - Published: 2019-04-18 - Granted: 2020-09-08 - Earliest claimed: 2016-03-24 - Assignees: Commonwealth Scientific and Industrial Research Organisation - Applicants: Commonwealth Scientific and Industrial Research Organisation - Inventors: Chang Kyung Sung; Rodney Kendall; David Eric Humphrey; Hajime Suzuki - Web page: https://patentgrep.com/patent/US10771289B2 ## CPC - H04L 25/0204: {of multiple channels} - H04B 17/373: Predicting channel quality {or other radio frequency [RF]} parameters - H04L 25/0232: {by interpolation between sounding signals} - H04B 7/0413: MIMO systems - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract Disclosed is a method, receiver, multi-receiver device, system and computer readable medium for configuring a receiver to perform multi-transmitter channel estimation for a time-varying channel. In one aspect, the method includes: wirelessly receiving at least two frames, each frame including a block of training symbols received at different points in time for a time-varying channel; estimating, for each block at a block location, a first channel coefficient of the time-varying channel, wherein the block location is the same for each block; and interpolating or extrapolating a plurality of second channel coefficients for the respective training symbols of each block based on the respective first channel coefficient. ## Claims ### Claim 1 A method of performing multi-transmitter channel estimation for a time-varying channel, wherein the method includes: (a) wirelessly receiving at least two frames, each frame including a block of training symbols received at different points in time for a time-varying channel; (b) estimating, for each block at a block location, a first channel coefficient of the time-varying channel, wherein the block location is the same for each block; (c) interpolating or extrapolating a plurality of second channel coefficients for the respective training symbols of each block based on the respective first channel coefficient; (d) re-estimating the first channel coefficient for each block based on the plurality of second channel coefficients for each block; and (e) re-estimating the plurality of second channel coefficients for each block by interpolation or extrapolation using the respective first channel coefficient. ### Claim 2 (depends on 1) The method according to claim 1, wherein the method further includes (f) iteratively performing steps (d) and (e) until the respective plurality of second channel coefficients for each block have converged, or until a specified number of iterations is reached. ### Claim 3 (depends on 1) The method according to claim 1, wherein a first channel coefficient for each block is estimated in step (b) as being constant throughout reception of the respective block. ### Claim 4 (depends on 1) The method according to claim 1, wherein the method is performed in a time domain. ### Claim 5 (depends on 1) The method according to claim 1, wherein the method is performed in a frequency domain. ### Claim 6 (depends on 1) The method according to claim 1, wherein the time-varying channel is a narrowband communication channel, wherein the narrowband communication channel has at least one of: a carrier frequency of more than 1 GHz; and a bandwidth of more than 25 KHz. ### Claim 7 (depends on 1) The method according to claim 1, wherein the time-varying channel is a wideband communication channel. ### Claim 8 A receiver configured to perform multi-transmitter channel estimation for a time-varying channel, wherein the receiver is configured to: (a) wirelessly receive at least two frames, each frame including a block of training symbols at different points in time for a time-varying channel; (b) estimate, for each block at a block location, a first channel coefficient of the time-varying channel, wherein the block location is the same for each block; (c) interpolate or extrapolate a plurality of second channel coefficients for the respective training symbols of each block based on the respective first channel coefficient; (d) re-estimate the first channel coefficient for each block based on the plurality of second channel coefficients for each block; and (e) re-estimate the plurality of second channel coefficients for each block by interpolation or extrapolation using the respective first channel coefficient. ### Claim 9 (depends on 8) The receiver according to claim 8, wherein the receiver is configured to iteratively re-estimate the first and second channel coefficients for each block until convergence, or until a specified number of iterations is reached. ### Claim 10 (depends on 8) The receiver according to claim 8, wherein the receiver is configured to estimate, for each block, the first channel coefficient as being constant throughout reception of the respective block. ### Claim 11 (depends on 8) The receiver according to claim 8, wherein the receiver is configured to perform the multi-transmitter channel estimation in a time domain. ### Claim 12 (depends on 8) The receiver according to claim 8, wherein the receiver is configured to perform the multi-transmitter channel estimation in a frequency domain. ### Claim 13 (depends on 8) The receiver according to claim 8, wherein the time-varying channel is a narrowband communication channel, wherein the narrowband communication channel has at least one of: a carrier frequency of more than 1 GHz; and a bandwidth of more than 25 KHz. ### Claim 14 (depends on 8) The receiver according claim 8, wherein the time-varying channel is a wideband communication channel.