# US 11,444,815 B2 · Method for transmitting and receiving uplink signal in wireless communication system, and apparatus therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,815 B2 - Document ID: US11444815B2 - Status: Granted - Kind: B2 - Application number: 16/970,214 - Filed: 2019-02-14 - Published: 2021-07-01 - Granted: 2022-09-13 - Earliest claimed: 2018-02-14 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jaehyung Kim; Seunggye Hwang; Suckchel Yang - Web page: https://patentgrep.com/patent/US11444815B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 27/26526: {with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]} - H04L 27/2082: {for offset or staggered quadrature phase shift keying} - H04L 27/2614: {Peak power aspects} - H04L 27/2628: {Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators (H04L27/2634 takes precedence)} - H04L 27/34: Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems - H04J 13/004: {Orthogonal} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## Abstract The present specification provides a method by which a terminal transmits an uplink signal in a wireless communication system. Particularly, the terminal scrambles a plurality of bits for transmission of an uplink signal, and generates a plurality of complex symbols by modulating the plurality of bits according to a specific modulation method. In addition, the terminal repetitively performs, a predetermined number of times, discrete Fourier transform (DFT) and inverse fast Fourier transform (IFFT) on at least one complex symbol of the plurality of complex symbols, and transmits the uplink signal, which is generated through the DFT and IFFT, to a base station, wherein the at least one complex symbol has a phase value which is increased or reduced as much as a specific value according to a symbol index. ## Claims ### Claim 1 A method for transmitting, by a user equipment, an uplink signal in a wireless communication system, the method comprising: scrambling a plurality of bits for a transmission of the uplink signal; generating a plurality of complex symbols by modulating the plurality of bits based on a specific modulation scheme; performing an orthogonal cover code (OCC) multiplexing to at least one complex symbol of the plurality of complex symbols, wherein the OCC multiplexing is based on an OCC sequence set including at least one OCC sequence indexed by an OCC index; performing a discrete Fourier transform (DFT) and an inverse fast Fourier transform (IFFT) by repeating the at least one complex symbol of the plurality of complex symbols by a given number of times; and transmitting, to a base station, the uplink signal generated through the DFT and the IFFT, wherein based on (i) a specific number of user multiplexing and (ii) an OCC sequence with a specific value of the OCC index being configured, a phase value of each complex symbol included in the OCC multiplexed at least one complex symbol is increased or decreased by applying a specific phase value to the phase value of each the complex symbol based on a symbol index assigned to each the complex symbol included in the OCC multiplexed at least one complex symbol. ### Claim 2 (depends on 1) The method of claim 1, wherein the specific modulation scheme is π/2-binary phase shift keying (BPSK) or π/4-quadrature phase shift keying (QPSK) for a low peak to average ratio (PAPR). ### Claim 3 (depends on 1) The method of claim 1, wherein the OCC multiplexing is applied to the at least one complex symbol by repeating the at least one complex symbol and based on one of the at least one OCC sequence, and wherein each elements included in the one of the at least one OCC sequence is applied to each of the repeated at least one complex symbol. ### Claim 4 (depends on 3) The method of claim 3, wherein the specific value is determined based on a number of user equipments multiplexed through the OCC and the symbol index. ### Claim 5 (depends on 4) The method of claim 4, wherein the specific value is determined according to an equation below based on the number of multiplexed user equipments being equal to M x = π 2 1 ⁢ 2 M . ### Claim 6 (depends on 4) The method of claim 4, wherein a number of the repeated at least one complex symbol is equal to the number of multiplexed user equipments. ### Claim 7 (depends on 3) The method of claim 3, wherein a phase between adjacent two of the elements included in the one of the at least one OCC sequence has a phase difference of 0 or π. ### Claim 8 (depends on 1) The method of claim 1, wherein the plurality of bits is transmitted using a physical uplink control channel (PUCCH) format 4. ### Claim 9 (depends on 1) The method of claim 1, wherein a symbol number of the at least one complex symbol is an odd number. ### Claim 10 (depends on 1) The method of claim 1, wherein the plurality of bits is randomized through the scrambling. ### Claim 11 (depends on 1) The method of claim 1, wherein the uplink signal is a physical uplink shared channel (PUSCH) or a physical uplink control channel. ### Claim 12 A user equipment for transmitting an uplink signal in a wireless communication system, the user equipment comprising: a radio frequency (RF) module for transmitting and receiving radio signals; and a processor functionally coupled to the RF module, wherein the processor is configured to: control to scramble a plurality of bits for a transmission of the uplink signal, control to generate a plurality of complex symbols by modulating the plurality of bits based on a specific modulation scheme, performing an orthogonal cover code (OCC) multiplexing to at least one complex symbol of the plurality of complex symbols, wherein the OCC multiplexing is based on an OCC sequence set including at least one OCC sequence indexed by an OCC index; control to perform a discrete Fourier transform (DFT) and an inverse fast Fourier transform (IFFT) by repeating the at least one complex symbol of the plurality of complex symbols by a given number of times, and control to transmit, to a base station, the uplink signal generated through the DFT and the IFFT, wherein based on (i) a specific number of user multiplexing and (ii) an OCC sequence with a specific value of the OCC index being configured, a phase value of each complex symbol included in the OCC multiplexed at least one complex symbol is increased or decreased by applying a specific phase value to the phase value of each the complex symbol based on a symbol index assigned to each the complex symbol included in the OCC multiplexed at least one complex symbol. ### Claim 13 (depends on 12) The user equipment of claim 12, wherein the specific modulation scheme is π/2-binary phase shift keying (BPSK) or π/4-quadrature phase shift keying (QPSK) for a low peak to average ratio (PAPR). ### Claim 14 (depends on 12) The user equipment of claim 12, wherein the OCC multiplexing is applied to the at least one complex symbol by repeating the at least one complex symbol and based on one of the at least one OCC sequence, and wherein each elements included in the one of the at least one OCC sequence is applied to each of the repeated at least one complex symbol. ### Claim 15 (depends on 14) The user equipment of claim 14, wherein the specific value is determined based on a number of user equipments multiplexed through the OCC and the symbol index. ### Claim 16 (depends on 15) The user equipment of claim 15, wherein the specific value is determined according to an equation below based on the number of multiplexed user equipments being equal to M x = π 2 1 ⁢ 2 M . ### Claim 17 (depends on 15) The user equipment of claim 15, wherein a number of the repeated at least one complex symbol is equal to the number of multiplexed user equipments. ### Claim 18 (depends on 14) The user equipment of claim 14, wherein a phase between adjacent two of the elements included in the one of the at least one OCC sequence has a phase difference of 0 or π. ### Claim 19 (depends on 12) The user equipment of claim 12, wherein the plurality of bits is transmitted using a physical uplink control channel (PUCCH) format 4. ### Claim 20 (depends on 12) The user equipment of claim 12, wherein a symbol number of the at least one complex symbol is an odd number.