# US 10,873,375 B2 · Pre-coder selection based on resource block grouping > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,375 B2 - Document ID: US10873375B2 - Status: Granted - Kind: B2 - Application number: 13/765,233 - Filed: 2013-02-12 - Published: 2014-08-14 - Granted: 2020-12-22 - Earliest claimed: 2006-03-20 - Assignees: Texas Instruments Incorporated - Applicants: Texas Instruments Incorporated - Inventors: Eko N. Onggosanusi; Badri Varadarajan; Anand Ganesh Dabak - Web page: https://patentgrep.com/patent/US10873375B2 ## CPC - H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting - H04L 25/0228: {with direct estimation from sounding signals} - H04L 27/2626: {Arrangements specific to the transmitter only} - H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention provides a receiver. In one embodiment, the receiver includes a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates. The receiver also includes a feedback generator portion configured to provide to the transmitter a pre-coder selection for data transmission that is based on the channel estimates, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks. The present invention also provides a transmitter having multiple antennas. In one embodiment, the transmitter includes a transmit portion coupled to the multiple antennas and capable of applying pre-coding to a data transmission for a receiver. The transmitter also includes a feedback decoding portion configured to decode a pre-coder selection for the data transmission that is fed back from the receiver, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks. ## Claims ### Claim 1 A receiver, comprising: a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates; and a feedback generator portion configured to provide a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection provides a single pre-coder for each group of contiguous resource blocks and corresponds to a grouping of frequency-domain resource blocks. ### Claim 2 (depends on 1) The receiver as recited in claim 1 wherein a number of contiguous resource blocks corresponding to each group is varied and configured by the transmitter employing signaling to the receiver via a broadcast or a common control channel. ### Claim 3 (depends on 1) The receiver as recited in claim 1 wherein a number of contiguous resource blocks corresponding to each group is varied and configured by a network employing signaling to the receiver via a higher layer signaling. ### Claim 4 A receiver, comprising: a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates; and a feedback generator portion configured to provide a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection provides a set of pre-coders corresponding to a subgroup of resource blocks contained in each group of contiguous resource blocks and corresponds to a grouping of frequency-domain resource blocks. ### Claim 5 A receiver, comprising: a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates; and a feedback generator portion configured to provide a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection provides a set of pre-coders corresponding to a combination of groups of contiguous resource blocks and corresponds to a grouping of frequency-domain resource blocks. ### Claim 6 A receiver, comprising: a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates; and a feedback generator portion configured to provide a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection is jointly encoded to achieve feedback transmission compression and corresponds to a grouping of frequency-domain resource blocks. ### Claim 7 A receiver, comprising: a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates; and a feedback generator portion configured to provide a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection is jointly encoded with a channel quality indicator and corresponds to a grouping of frequency-domain resource blocks. ### Claim 8 A method of operating a receiver, comprising: providing channel estimates employing transmission signals from a transmitter having multiple antennas; and feeding back a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks and provides a single pre-coder for each group of contiguous resource blocks. ### Claim 9 (depends on 8) The method as recited in claim 8 wherein a number of contiguous resource blocks corresponding to each group is varied and configured by the transmitter employing signaling to the receiver via a broadcast or a common control channel. ### Claim 10 (depends on 8) The method as recited in claim 8 wherein a number of contiguous resource blocks corresponding to each group is varied and configured by a network employing signaling to the receiver via a higher layer signaling. ### Claim 11 A method of operating a receiver, comprising: providing channel estimates employing transmission signals from a transmitter having multiple antennas; and feeding back a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection provides a set of pre-coders corresponding to a subgroup of resource blocks contained in each group of contiguous resource blocks and corresponds to a grouping of frequency-domain resource blocks. ### Claim 12 A method of operating a receiver, comprising: providing channel estimates employing transmission signals from a transmitter having multiple antennas; and feeding back a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection provides a set of pre-coders corresponding to a combination of groups of contiguous resource blocks and corresponds to a grouping of frequency-domain resource blocks. ### Claim 13 A method of operating a receiver, comprising: providing channel estimates employing transmission signals from a transmitter having multiple antennas; and feeding back a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection is jointly encoded to achieve feedback transmission compression and corresponds to a grouping of frequency-domain resource blocks. ### Claim 14 A method of operating a receiver, comprising: providing channel estimates employing transmission signals from a transmitter having multiple antennas; and feeding back a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection is jointly encoded with a channel quality indicator and corresponds to a grouping of frequency-domain resource blocks. ### Claim 15 A receiver, comprising: a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates; and a feedback generator portion configured to provide a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks, wherein each of the resource blocks represents 180kHz bandwidth. ### Claim 16 (depends on 15) The receiver as recited in claim 15, wherein each of the resource blocks represents 180kHz bandwidth comprising 12 OFDM/OFDMA sub-carriers. ### Claim 17 (depends on 16) The receiver as recited in claim 16, wherein each of the resource blocks represents 180kHz bandwidth comprising 12 OFDM/OFDMA sub-carriers thereby giving a group size of 900 kHZ for each of first, second and third pre-coders selected. ### Claim 18 A receiver, comprising: a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates; and a feedback generator portion configured to provide a pre-coder selection for data transmission to the transmitter that is based on the channel estimates, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks, wherein each of the resource blocks represents 180kHz bandwidth. ### Claim 19 (depends on 18) The receiver as recited in claim 18, wherein each of the resource blocks represents 180kHz bandwidth comprising 12 OFDM/OFDMA sub-carriers. ### Claim 20 (depends on 19) The method as recited in claim 19, wherein each of the resource blocks represents 180kHz bandwidth comprising 12 OFDM/OFDMA sub-carriers thereby giving a group size of 900 kHZ for each of first, second and third pre-coders selected.