# US 2025/0158741 A1 · Peak-to-average power ratio based frequency interleaving > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0158741 A1 - Document ID: US20250158741A1 - Status: Published application - Kind: A1 - Application number: 18/505,618 - Filed: 2023-11-09 - Published: 2025-05-15 - Earliest claimed: 2023-11-09 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: David YUNUSOV; Amit BAR-OR TILLINGER; Peer BERGER - Web page: https://patentgrep.com/patent/US20250158741A1 ## CPC - H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)} - H04L 27/2614: {Peak power aspects} - H04L 27/2634: {Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract In some implementations, a transmitter may transmit an indication of a frequency interleaver, from a set of frequency interleavers, that provides an interleaved sequence for a communication, the frequency interleaver being selected based on a peak-to-average power ratio (PAPR) of the interleaved sequence. The transmitter may transmit the communication including the interleaved sequence, and an index of the interleaved sequence being associated with an input signal that is interleaved via the frequency interleaver when the input signal is in a frequency domain. ## Claims ### Claim 1 A transmitter for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the transmitter to: transmit an indication of a frequency interleaver, from a set of frequency interleavers, that provides an interleaved sequence for a communication, the frequency interleaver being selected based on a peak-to-average power ratio (PAPR) of the interleaved sequence; and transmit the communication, including the interleaved sequence, and an index of the interleaved sequence being associated with an input signal that is interleaved via the frequency interleaver when the input signal is in a frequency domain. ### Claim 2 (depends on 1) The transmitter of claim 1, wherein the one or more processors are further configured to cause the transmitter to: communicate capability information indicating support for applying the set of frequency interleavers for the communication. ### Claim 3 (depends on 2) The transmitter of claim 2, wherein the capability information indicates support for applying the set of frequency interleavers to the input signal to generate a signal for the communication. ### Claim 4 (depends on 1) The transmitter of claim 1, wherein the one or more processors are further configured to cause the transmitter to: communicate an indication of the set of frequency interleavers. ### Claim 5 (depends on 1) The transmitter of claim 1, wherein the indication of the frequency interleaver indicates that the frequency interleaver is to be applied for a time interval. ### Claim 6 (depends on 5) The transmitter of claim 5, wherein the time interval includes: a slot, a subframe, or one or more orthogonal frequency division multiplexing (OFDM) symbols. ### Claim 7 (depends on 1) The transmitter of claim 1, wherein the input signal is interleaved via the frequency interleaver prior to an inverse fast Fourier transform (iFFT) operation. ### Claim 8 (depends on 1) The transmitter of claim 1, wherein the frequency interleaver interleaves, in the frequency domain, at least one of: one or more bits, one or more resource elements, or one or more constellation symbols. ### Claim 9 (depends on 8) The transmitter of claim 8, wherein the one or more resource elements are associated with different code blocks. ### Claim 10 (depends on 1) The transmitter of claim 1, wherein the one or more processors are further configured to cause the transmitter to: generate, using the input signal, a set of interleaved sequences associated with respective frequency interleavers of the set of frequency interleavers; and select the frequency interleaver from the set of frequency interleavers in association with the PAPR being a lowest PAPR among PAPRs associated with respective interleaved sequences of the set of interleaved sequences. ### Claim 11 (depends on 10) The transmitter of claim 10, wherein the one or more processors, to cause the transmitter to generate the set of interleaved sequences, are configured to cause the transmitter to: apply, for each interleaved sequence of the set of interleaved sequences, an inverse fast Fourier transform (iFFT) to only portions of that interleaved sequence that have been interleaved. ### Claim 12 A receiver for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the receiver to: receive an indication of a frequency interleaver, from a set of frequency interleavers, that provides an interleaved sequence for a communication, the frequency interleaver being selected based on a peak-to-average power ratio (PAPR) of the interleaved sequence; and receive the communication including the interleaved sequence, an index of the interleaved sequence being associated with an input signal that is interleaved via the frequency interleaver when the input signal is in a frequency domain. ### Claim 13 (depends on 12) The receiver of claim 12, wherein the one or more processors are further configured to cause the receiver to: communicate capability information indicating support for applying the set of frequency interleavers for the communication. ### Claim 14 (depends on 13) The receiver of claim 13, wherein the capability information is associated with radio resource control signaling, uplink control information signaling, or downlink control information signaling. ### Claim 15 (depends on 12) The receiver of claim 12, wherein the one or more processors are further configured to cause the receiver to: communicate an indication of the set of frequency interleavers. ### Claim 16 (depends on 15) The receiver of claim 15, wherein the indication of the set of frequency interleavers is associated with radio resource control signaling or downlink control information signaling. ### Claim 17 (depends on 12) The receiver of claim 12, wherein the indication of the frequency interleaver indicates that the frequency interleaver is to be applied for a time interval. ### Claim 18 (depends on 12) The receiver of claim 12, wherein the input signal is an input to an inverse fast Fourier transform (iFFT) component associated with generating a signal for the communication. ### Claim 19 (depends on 12) The receiver of claim 12, wherein the frequency interleaver interleaves, in the frequency domain, at least one of: one or more bits, one or more resource elements, or one or more constellation symbols. ### Claim 20 (depends on 12) The receiver of claim 12, wherein the one or more processors, to cause the receiver to receive the communication, are configured to cause the receiver to: apply, to a signal associated with the communication, a fast Fourier transform (FFT) to transform the signal to the frequency domain; and deinterleave, in accordance with the frequency interleaver, the signal in the frequency domain. ### Claim 21 (depends on 20) The receiver of claim 20, wherein the one or more processors, to cause the receiver to deinterleave the signal in the frequency domain, are configured to cause the receiver to: deinterleave, prior to performing a log-likelihood ratio generation operation, the signal in the frequency domain. ### Claim 22 A method of wireless communication performed by a transmitter, comprising: transmitting an indication of a frequency interleaver, from a set of frequency interleavers, that provides an interleaved sequence for a communication, the frequency interleaver being selected based on a peak-to-average power ratio (PAPR) of the interleaved sequence; and transmitting the communication including the interleaved sequence, and an index of the interleaved sequence being associated with an input signal that is interleaved via the frequency interleaver when the input signal is in a frequency domain. ### Claim 23 (depends on 22) The method of claim 22, further comprising: communicating capability information indicating support for applying the set of frequency interleavers for the communication. ### Claim 24 (depends on 22) The method of claim 22, further comprising: communicating an indication of the set of frequency interleavers. ### Claim 25 (depends on 22) The method of claim 22, wherein the indication of the frequency interleaver indicates that the frequency interleaver is to be applied for a time interval. ### Claim 26 (depends on 22) The method of claim 22, wherein the input signal is interleaved via the frequency interleaver prior to an inverse fast Fourier transform (iFFT) operation. ### Claim 27 (depends on 22) The method of claim 22, further comprising: generating, using the input signal, a set of interleaved sequences associated with respective frequency interleavers of the set of frequency interleavers; and selecting the frequency interleaver from the set of frequency interleavers in association with the PAPR being a lowest PAPR among PAPRs associated with respective interleaved sequences of the set of interleaved sequences. ### Claim 28 A method of wireless communication performed by a receiver, comprising: receiving an indication of a frequency interleaver, from a set of frequency interleavers, that provides an interleaved sequence for a communication, the frequency interleaver being selected based on a peak-to-average power ratio (PAPR) of the interleaved sequence; and receiving the communication including the interleaved sequence, and an index of the interleaved sequence being associated with an input signal that is interleaved via the frequency interleaver when the input signal is in a frequency domain. ### Claim 29 (depends on 28) The method of claim 28, wherein receiving the communication comprises: applying, to a signal associated with the communication, a fast Fourier transform (FFT) to transform the signal to the frequency domain; and deinterleaving, in accordance with the frequency interleaver, the signal in the frequency domain. ### Claim 30 (depends on 29) The method of claim 29, wherein deinterleaving the signal in the frequency domain comprises: deinterleaving, prior to performing a log-likelihood ratio generation operation, the signal in the frequency domain.