# US 11,444,672 B2 · Antenna switch diversity or cyclic delay diversity selection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,672 B2 - Document ID: US11444672B2 - Status: Granted - Kind: B2 - Application number: 17/202,922 - Filed: 2021-03-16 - Published: 2021-09-16 - Granted: 2022-09-13 - Earliest claimed: 2020-03-16 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Peer Berger; Shay Landis; Moshe Ben-Ari; Assaf Touboul; Amit Bar-Or Tillinger; Michael Levitsky; Cheol Hee Park; Haim Weissman; Jungsik Park; In Hyuck Yeo - Web page: https://patentgrep.com/patent/US11444672B2 ## CPC - H04B 7/0671: {using different delays between antennas} - H04B 7/0602: {using antenna switching (H04B7/0686 takes precedence; antenna beam directivity switching H01Q3/24)} - H04B 7/0689: {using different transmission schemes, at least one of them being a diversity transmission scheme} - H04L 5/0023: {Time-frequency-space} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Aspects relate to mechanisms for a wireless communication device to select between a cyclic delay diversity mode and an antenna switch diversity mode for transmission of a signal based on at least one parameter associated with communication over a wireless channel. The parameter(s) may include a channel estimation parameter associated with the wireless channel, a communication parameter associated with at least one communication on the wireless channel, or a combination thereof. ## Claims ### Claim 1 A method of wireless communication at a wireless communication device, the method comprising: obtaining a plurality of parameters associated with communication by the wireless communication device over a wireless channel, wherein each of the plurality of parameters corresponds to a different channel estimation parameter associated with the wireless channel or a different communication parameter associated with at least one communication on the wireless channel; selecting a transmission mode based on a combination of the plurality of parameters, wherein the transmission mode comprises one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode; and transmitting a signal using the selected transmission mode. ### Claim 2 (depends on 1) The method of claim 1, wherein the channel estimation parameter comprises one or more of a Doppler spread, a delay spread, an antenna imbalance between at least a first antenna and a second antenna, or an antenna correlation between at least the first antenna and the second antenna. ### Claim 3 (depends on 1) The method of claim 1, wherein the communication parameter comprises one or more of a modulation and coding scheme (MCS) or an allocated resource block (RB) size. ### Claim 4 (depends on 1) The method of claim 1, wherein the obtaining the plurality of parameters further comprises: determining a respective combined value for at least one parameter of the plurality of parameters associated with a set of signals communicated over a time window to produce at least one combined parameter, wherein the selecting the transmission mode further comprises: selecting the transmission mode based on the respective combined value for the at least one parameter. ### Claim 5 (depends on 1) The method of claim 1, further comprising: applying a respective weight to each of the plurality of parameters to produce a plurality of weighted parameters, wherein the selecting the transmission mode further comprises: selecting the transmission mode based on the plurality of weighted parameters. ### Claim 6 (depends on 1) The method of claim 1, wherein the transmitting the signal using the selected transmission mode further comprises: transmitting the signal on a sidelink to another wireless communication device. ### Claim 7 A wireless communication device in a wireless communication network, comprising: a transceiver coupled to at least a first antenna and a second antenna; a memory; and a processor coupled to the transceiver and the memory, wherein the processor and the memory are configured to: obtain a plurality of parameters associated with communication by the wireless communication device over a wireless channel, wherein each of the plurality of parameters corresponds to a different channel estimation parameter associated with the wireless channel or a different communication parameter associated with at least one communication on the wireless channel; select a transmission mode based on a combination of the plurality of parameters, wherein the transmission mode comprises one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode; and transmit a signal using the selected transmission mode via the transceiver. ### Claim 8 (depends on 7) The wireless communication device of claim 7, wherein the channel estimation parameter comprises one or more of a Doppler spread, a delay spread, an antenna imbalance between at least the first antenna and the second antenna, or an antenna correlation between at least the first antenna and the second antenna. ### Claim 9 (depends on 7) The wireless communication device of claim 7, wherein the communication parameter comprises one or more of a modulation and coding scheme (MCS) or an allocated resource block (RB) size. ### Claim 10 (depends on 7) The wireless communication device of claim 7, wherein the processor and the memory are further configured to: determine a respective combined value for at least one parameter of the plurality of parameters associated with a set of signals communicated over a time window to produce at least one combined parameter; and select the transmission mode based on the respective combined value for the at least one parameter. ### Claim 11 (depends on 7) The wireless communication device of claim 7, wherein the processor and the memory are further configured to: apply a respective weight to each of the plurality of parameters to produce a plurality of weighted parameters; and select the transmission mode based on the plurality of parameters. ### Claim 12 (depends on 7) The wireless communication device of claim 7, wherein the processor and the memory are further configured to transmit the signal on a sidelink to another wireless communication device. ### Claim 13 A wireless communication device in a wireless communication network, comprising: means for obtaining a plurality of parameters associated with communication by the wireless communication device over a wireless channel, wherein each of the plurality of parameters corresponds to a different channel estimation parameter associated with the wireless channel or a different communication parameter associated with at least one communication on the wireless channel; means for selecting a transmission mode based on a combination of the plurality of parameters, wherein the transmission mode comprises one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode; and means for transmitting a signal using the selected transmission mode. ### Claim 14 (depends on 13) The wireless communication device of claim 13, wherein the channel estimation parameter comprises one or more of a Doppler spread, a delay spread, an antenna imbalance between at least a first antenna and a second antenna, or an antenna correlation between at least the first antenna and the second antenna. ### Claim 15 (depends on 13) The wireless communication device of claim 13, wherein the communication parameter comprises one or more of a modulation and coding scheme (MCS) or an allocated resource block (RB) size. ### Claim 16 (depends on 13) The wireless communication device of claim 13, wherein the means for obtaining plurality of parameters further comprises: means for determining a respective combined value for at least one parameter of the plurality of parameters associated with a set of signals communicated over a time window to produce at least one combined parameter, wherein the means for selecting the transmission mode further comprises: means for selecting the transmission mode based on the respective combined value for the at least one parameter. ### Claim 17 (depends on 13) The wireless communication device of claim 13, further comprising: means for applying a respective weight to each of the plurality of parameters to produce a plurality of weighted parameters, wherein the means for selecting the transmission mode further comprises: means for selecting the transmission mode based on the plurality of weighted parameters. ### Claim 18 (depends on 13) The wireless communication device of claim 13, wherein the means for transmitting the signal using the selected transmission mode further comprises: means for transmitting the signal on a sidelink to another wireless communication device. ### Claim 19 A non-transitory computer-readable medium having stored therein instructions executable by one or more processors of a wireless communication device to: obtain a plurality of parameters associated with communication by the wireless communication device over a wireless channel, wherein each of the plurality of parameters corresponds to a different channel estimation parameter associated with the wireless channel or a different communication parameter associated with at least one communication on the wireless channel; select a transmission mode based on a combination of the plurality of parameters, wherein the transmission mode comprises one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode; and transmit a signal using the selected transmission mode. ### Claim 20 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the channel estimation parameter comprises one or more of a Doppler spread, a delay spread, an antenna imbalance between at least a first antenna and a second antenna, or an antenna correlation between at least the first antenna and the second antenna. ### Claim 21 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the communication parameter comprises one or more of a modulation and coding scheme (MCS) or an allocated resource block (RB) size. ### Claim 22 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the non-transitory computer-readable medium further has stored therein instructions executable by the one or more processors of the wireless communication device to: determine a respective combined value for at least one parameter of the plurality of parameters associated with a set of signals communicated over a time window to produce at least one combined parameter; and select the transmission mode based on the respective combined value for the at least one parameter. ### Claim 23 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the non-transitory computer-readable medium further has stored therein instructions executable by the one or more processors of the wireless communication device to: apply a respective weight to each of the plurality of parameters to produce a plurality of weighted parameters; and select the transmission mode based on the plurality of weighted parameters. ### Claim 24 (depends on 19) The non-transitory computer-readable medium of claim 19, wherein the non-transitory computer-readable medium further has stored therein instructions executable by the one or more processors of the wireless communication device to: transmit the signal on a sidelink to another wireless communication device.