# US 2022/0029772 A1 · Duplicated data sequence transmissions with reduced peak to average power ratio > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0029772 A1 - Document ID: US20220029772A1 - Status: Published application - Kind: A1 - Application number: 17/382,263 - Filed: 2021-07-21 - Published: 2022-01-27 - Earliest claimed: 2020-07-22 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Kanke WU; Jialing Li CHEN; Bin TIAN - Web page: https://patentgrep.com/patent/US20220029772A1 ## CPC - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04L 27/2621: {Reduction thereof using phase offsets between subcarriers} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - 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)} - H04L 27/2602: {Signal structure} - H04L 27/2634: {Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Duplicated physical layer convergence protocol (PLCP) protocol data unit (PPDU) transmission is described for a wireless device with reduced peak-to-average power ratios (PAPR). One example includes obtaining a first sub-PPDU from to PPDU that includes a data field with data content. A second sub-PPDU may also be obtained by duplicating the PPDU including the data content of the PPDU. At least one of a phase rotation, a phase offset, or a phase ramp is applied to at least a portion of a second set of sub-carrier of a wideband channel. The first sub-PPDU is transmitted on a first set of sub-carriers of the wideband channel and the second sub-PPDU is transmitted on the second set of sub-carriers of the wideband channel. ## Claims ### Claim 1 A method for wireless communication by a wireless communication device, comprising: obtaining a first sub-physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a PPDU that includes a data field with data content; obtaining a second sub-PPDU by duplicating the PPDU including the data content of the PPDU; applying at least one of a phase rotation, a phase offset, or a phase ramp to at least a portion of a second set of sub-carriers; and transmitting, simultaneously, the first sub-PPDU on a first set of sub-carriers of a wideband channel and the second sub-PPDU on the second set of sub-carriers of the wideband channel. ### Claim 2 (depends on 1) The method of claim 1, wherein the PPDU further comprises a long training field (LTF) sequence, wherein obtaining a first sub-PPDU comprises obtaining the first sub-PPDU including the LTF sequence, and obtaining the second sub-PPDU comprises obtaining the second sub-PPDU including the LTF sequence. ### Claim 3 (depends on 2) The method of claim 2, wherein applying a phase rotation comprises applying a same phase rotation to the data content and LTF sequence. ### Claim 4 (depends on 3) The method of claim 3, wherein the LTF comprises an extreme high throughput (EHT) LTF. ### Claim 5 (depends on 1) The method of claim 1, wherein the PPDU further comprises a long training field (LTF) sequence, and wherein transmitting further comprises transmitting the LTF sequence of the PPDU on the wideband channel using sub-carriers from among both of the first and the second set of sub-carriers. ### Claim 6 (depends on 1) The method of claim 1, wherein applying the phase rotation comprises applying a phase rotation to each of the second set of subcarriers. ### Claim 7 (depends on 6) The method of claim 6, wherein the PPDU further comprises a long training field (LTF) sequence and a short training field (STF) sequence, wherein obtaining a first sub-PPDU comprises obtaining the first sub-PPDU including the LTF and STF sequences, and obtaining the second sub-PPDU comprises obtaining the second sub-PPDU including the LTF and STF sequences, and applying the phase rotation further comprises applying the phase rotation to the LTF and STF sequences. ### Claim 8 (depends on 6) The method of claim 6, wherein applying the phase rotation comprises multiplying the second set of sub-carriers by a constant phase rotation factor of (−1). ### Claim 9 (depends on 1) The method of claim 1, wherein applying the phase offset comprises applying a phase offset to each of the second set of subcarriers. ### Claim 10 (depends on 1) The method of claim 1, wherein the second set of subcarriers are ordered with a sequential index and wherein applying the phase ramp comprises applying an additional phase ramp of π to each subcarrier in order of its respective index. ### Claim 11 (depends on 1) The method of claim 1, wherein applying the phase ramp comprises selecting the phase ramp as an equivalent circular delay in a time domain of the second set of sub-carriers and wherein the delay is a fraction of a symbol duration of the data content. ### Claim 12 (depends on 1) The method of claim 1, wherein applying the phase ramp comprises selecting the phase ramp by multiplying an index of a respective subcarrier k by a constant e raised to a power of (j2πkτ)/T, wherein T is a symbol duration of a data symbol of a data sequence and τ is selected as less than one hundredth of T. ### Claim 13 (depends on 12) The method of claim 12, further comprising applying a phase offset. ### Claim 14 (depends on 1) The method of claim 1, wherein the first set of sub-carriers are comprised of a first sub-band of the wideband channel, wherein the second set of sub-carriers are comprised of a second sub-band of the wideband channel, and wherein transmitting the second set of sub-carriers comprises transmitting using a higher frequency sub-band of the wideband channel than when transmitting the first set of sub-carriers. ### Claim 15 (depends on 1) The method of claim 1, wherein obtaining the first sub-PPDU comprises obtaining the first sub-PPDU with a dual carrier modulation, and obtaining the second sub-PPDU comprises obtaining the second sub-PPDU with the same dual carrier modulation as for the first sub-PPDU. ### Claim 16 (depends on 1) The method of claim 1, wherein transmitting the first sub-PPDU comprises transmitting with a dual carrier modulation in a first single spatial stream and transmitting the second sub-PPDU comprises transmitting with the dual carrier modulation in a second single spatial stream. ### Claim 17 (depends on 1) The method of claim 1, wherein transmitting the first sub-PPDU comprises transmitting on at least one of an uplink sub-band and a downlink sub-band of a low power indoor band. ### Claim 18 (depends on 17) The method of claim 17, wherein transmitting the first sub-PPDU comprises transmitting in an Orthogonal Frequency Division Multiple Access (OFDMA) resource unit (RU) having one of: 484 sub-carriers in a 40 MHz bandwidth duplicated to have two (2) RU484s with an 80 MHz bandwidth, 996 sub-carriers in an 80 MHz bandwidth duplicated to have two (2) RU996s with a 160 MHz bandwidth, or 2×996 sub-carriers in a 160 MHz bandwidth duplicated to have two (2) RU(2×996)s with a 320 MHz bandwidth. ### Claim 19 (depends on 1) The method of claim 1, further comprising modulating the data content of the first sub-PPDU and the data content of the second sub-PPDU with binary phase shift keying before transmission, and wherein transmitting comprises transmitting the first sub-PPDU and the second sub-PPDU using dual carriers in a single spatial stream. ### Claim 20 (depends on 1) The method of claim 1, wherein the first set of sub-carriers are comprised of a first sub-band of the wideband channel, wherein the second set of sub-carriers are comprised of a second sub-band of the wideband channel, and wherein the first set of sub-carriers are contiguous and do not overlap with the second set of sub-carriers. ### Claim 21 (depends on 1) The method of claim 1, further comprising: obtaining a third sub-PPDU including the data content of the PPDU; applying, at least one of, a phase rotation, a phase offset, or a phase ramp to a third set of sub-carriers before transmission; obtaining a fourth sub-PPDU including the data content of the PPDU; applying, at least one of, a phase rotation, a phase offset, or a phase ramp to a fourth set of sub-carriers before transmission; and transmitting the third sub-PPDU on the third set of sub-carriers of the wideband channel and transmitting the fourth sub-PPDU on the fourth set sub-carriers of the wideband channel. ### Claim 22 (depends on 1) The method of claim 1, wherein the wideband channel is divided into four (4) sub-bands and wherein applying the phase rotation comprises multiplying the first, second, third and fourth sub-bands by a constant phase rotation factor of (+1, −1, +1, +1), respectively. ### Claim 23 (depends on 1) The method of claim 1, wherein applying a phase ramp comprises applying a phase ramp to a first subset of the second set of sub-carriers and applying a zero phase ramp to a second subset of the second set of sub-carriers, the method further comprising applying a phase ramp to a subset of the first set of sub-carriers. ### Claim 24 (depends on 1) The method of claim 1, further comprising applying different phase rotation factors to long training field sub-sequences of the respective sub-PPDUs. ### Claim 25 A method for wireless communication by a wireless communication device, comprising: obtaining a first sub-physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a PPDU that includes a data field with data content; obtaining a second sub-PPDU by duplicating the PPDU, wherein the data fields of the first and the second sub-PPDUs are valid data fields of a PPDU, and carry the same data content as the PPDU; applying at least one of a phase rotation, a phase offset, or a phase ramp to at least one of a first resource unit (RU)(2×996) or a second RU(2×996); and transmitting, simultaneously, the first sub-PPDU on the first RU(2×996) of a wideband channel and the second sub-PPDU on the second RU(2×996) of the wideband channel, wherein the first and second sub-PPDU comprise a duplicated packet format (DUPed) PPDU. ### Claim 26 A wireless communication device, comprising: at least one processor; and at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, is configured to: obtain a first sub-physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a PPDU that includes a data field with data content; obtain a second sub-PPDU by duplicating the PPDU including the data content of the PPDU; apply at least one of a phase rotation, a phase offset, or a phase ramp to at least a portion of a second set of sub-carriers; and transmit, simultaneously, the first sub-PPDU on a first set of sub-carriers of a wideband channel and the second sub-PPDU on the second set of sub-carriers of the wideband channel. ### Claim 27 (depends on 26) The device of claim 26, wherein the PPDU further comprises a long training field (LTF) sequence, wherein obtaining a first sub-PPDU comprises obtaining the first sub-PPDU including the LTF sequence, and obtaining the second sub-PPDU comprises obtaining the second sub-PPDU including the LTF sequence. ### Claim 28 (depends on 27) The device of claim 27, wherein applying a phase rotation comprises applying a same phase rotation to the data content and LTF sequence. ### Claim 29 (depends on 28) The device of claim 28, wherein the LTF comprises an extreme high throughput (EHT) LTF. ### Claim 30 (depends on 26) The device of claim 26, wherein the PPDU further comprises a long training field (LTF) sequence, and wherein transmitting further comprises transmitting the LTF sequence of the PPDU on the wideband channel using sub-carriers from among both of the first and the second set of sub-carriers. ### Claim 31 (depends on 26) The device of claim 26, wherein applying the phase rotation comprises applying a phase rotation to each of the second set of subcarriers. ### Claim 32 (depends on 31) The device of claim 31, wherein the PPDU further comprises a long training field (LTF) sequence and a short training field (STF) sequence, wherein obtaining a first sub-PPDU comprises obtaining the first sub-PPDU including the LTF and STF sequences, wherein obtaining the second sub-PPDU comprises obtaining the second sub-PPDU including the LTF and STF sequences, and applying the phase rotation further comprises applying the phase rotation to the LTF and STF sequences. ### Claim 33 (depends on 31) The device of claim 31, wherein applying the phase rotation comprises multiplying the second set of sub-carriers by a constant phase rotation factor of (−1). ### Claim 34 (depends on 26) The device of claim 26, wherein applying the phase offset comprises applying a phase offset to each of the second set of subcarriers. ### Claim 35 (depends on 26) The device of claim 26, wherein the second set of subcarriers are ordered with a sequential index and wherein applying the phase ramp comprises applying an additional phase ramp of π to each subcarrier in order of its respective index. ### Claim 36 (depends on 26) The device of claim 26, wherein applying the phase ramp comprises selecting the phase ramp as an equivalent circular delay in a time domain of the second set of sub-carriers and wherein the delay is a fraction of a symbol duration of the data content. ### Claim 37 (depends on 26) The device of claim 26, wherein applying the phase ramp comprises selecting the phase ramp by multiplying an index of a respective subcarrier k by a constant e raised to the power of (j2πkτ)/T, wherein T is a symbol duration of a data symbol of a data sequence and τ is selected as less than one hundredth of T. ### Claim 38 (depends on 37) The device of claim 37, further configured to apply a phase offset. ### Claim 39 (depends on 26) The device of claim 26, wherein the first set of sub-carriers are comprised of a first sub-band of the wideband channel, wherein the second set of sub-carriers are comprised of a second sub-band of the wideband channel, and wherein transmitting the second set of sub-carriers comprises transmitting using a higher frequency sub-band of the wideband channel than when transmitting the first set of sub-carriers. ### Claim 40 (depends on 26) The device of claim 26, wherein obtaining the first sub-PPDU comprises obtaining the first sub-PPDU with a dual carrier modulation and obtaining the second sub-PPDU comprises obtaining the second sub-PPDU with the same dual carrier modulation as for the first sub-PPDU. ### Claim 41 (depends on 26) The device of claim 26, wherein transmitting the first sub-PPDU comprises transmitting with a dual carrier modulation in a single spatial stream and wherein transmitting the second sub-PPDU comprises transmitting with the dual carrier modulation in a second single spatial stream. ### Claim 42 (depends on 26) The device of claim 26, wherein transmitting the first sub-PPDU comprises transmitting on at least one of an uplink sub-band and a downlink sub-band of a low power indoor band. ### Claim 43 (depends on 26) The device of claim 26, wherein transmitting the first sub-PPDU comprises transmitting in an Orthogonal Frequency Division Multiple Access (OFDMA) resource unit (RU) having one of: 484 sub-carriers in a 40 MHz bandwidth duplicated to have two (2) RU484s with an 80 MHz bandwidth, 996 sub-carriers in an 80 MHz bandwidth duplicated to have two (2) RU996s with a 160 MHz bandwidth, or 2×996 sub-carriers in a 160 MHz bandwidth duplicated to have two (2) RU(2×996)s with a 320 MHz bandwidth. ### Claim 44 (depends on 26) The device of claim 26, further configured to modulate the data content of the first sub-PPDU and the data content of the second sub-PPDU with binary phase shift keying before transmission and wherein transmitting comprises transmitting the first sub-PPDU and the second sub-PPDU using dual carriers in a single spatial stream. ### Claim 45 (depends on 26) The device of claim 26, wherein the first set of sub-carriers are comprised of a first sub-band of the wideband channel, wherein the second set of sub-carriers are comprised of a second sub-band of the wideband channel, and wherein the first set of sub-carriers are contiguous and do not overlap with the second set of sub-carriers. ### Claim 46 (depends on 26) The device of claim 26, wherein applying a phase ramp comprises applying a phase ramp to a first subset of the second set of sub-carriers and applying a zero phase ramp to a second subset of the second set of sub-carriers, the device further configured to apply a phase ramp to a subset of the first set of sub-carriers. ### Claim 47 (depends on 26) The device of claim 26, further configured to apply different phase rotation factors to long training field sub-sequences of the respective sub-PPDUs. ### Claim 48 A non-transitory processor-readable medium storing executable instructions, which when executed by one or more processors, causes one or more processors to: obtain a first sub-physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a PPDU that includes a data field with data content; obtain a second sub-PPDU by duplicating the PPDU including the data content of the PPDU; apply at least one of a phase rotation, a phase offset, or a phase ramp to at least a portion of a second set of sub-carriers; and transmit, simultaneously, the first sub-PPDU on a first set of sub-carriers of a wideband channel and the second sub-PPDU on the second set of sub-carriers of the wideband channel. ### Claim 49 A non-transitory processor-readable medium storing executable instructions, which when executed by one or more processors, causes one or more processors to: obtain a first sub-physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a PPDU that includes a data field with data content; obtain a second sub-PPDU by duplicating the PPDU including the data content of the PPDU, wherein the data fields of the first sub-PPDU and the second sub-PPDU are valid data fields of a PPDU, and carry the same data as the PPDU; apply at least one of a phase rotation, a phase offset, or a phase ramp to at least one of a first resource unit (RU)(2×996) or a second RU(2×996); and transmit, simultaneously, the first sub-PPDU on the first RU(2×996) of a wideband channel and the second sub-PPDU on the second RU(2×996) of the wideband channel, wherein the first and second sub-PPDU comprise a duplicated packet format (DUPed) PPDU.