# US 12,120,652 B2 · Method for transmitting or receiving signal in wireless communication system, and device for supporting same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,652 B2 - Document ID: US12120652B2 - Status: Granted - Kind: B2 - Application number: 17/421,216 - Filed: 2019-01-08 - Published: 2022-03-03 - Granted: 2024-10-15 - Earliest claimed: 2019-01-08 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Kijun Jeon; Sangrim Lee; Hojae Lee - Web page: https://patentgrep.com/patent/US12120652B2 ## CPC - 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)} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L 25/061: {providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of DC offset (removal of DC offset in coupling arrangements H04L25/029, H04L25/0296)} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - 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 The present specification provides a method for transmitting a signal in a wireless communication system. More specifically, the method performed by a transmission terminal comprises the steps of: generating at least one bit into a complex symbol by using a modulation scheme; mapping the complex symbol to subcarriers each having an even index or subcarriers each having an odd index among subcarriers of at least one configured resource block; performing IFFT on the subcarriers to which the complex symbol is mapped, in order to generate a time-continuous signal; performing a DC bias on the time-continuous signal; and transmitting the DC biased signal. ## Claims ### Claim 1 A method of transmitting a signal in a wireless communication system, the method performed by a transmission stage comprising: generating at least one bit as a complex value symbol by using a modulation scheme; mapping the complex value symbol to subcarriers having an even index or subcarriers having an odd index among subcarriers of at least one configured resource block (RB); performing an inverse fast Fourier transform (IFFT) on the subcarriers to which the complex value symbol has been mapped in order to generate a time continuous signal including a first real part signal and a first imaginary part signal; generating a second real part signal and a second imaginary part signal based on a partial signal in each of the first real part signal and the first imaginary part signal; performing a direct current (DC) bias on the time continuous signal based on the second real part signal and the second imaginary part signal; and transmitting the DC-biased signal. ### Claim 2 (depends on 1) The method of claim 1, wherein performing the DC bias includes applying a first value and a second value to the second real part signal and the second imaginary part signal, respectively. ### Claim 3 (depends on 2) The method of claim 2, wherein the first value is a minimum value of the second real part signal, and wherein the second value is a minimum value of the second imaginary part signal. ### Claim 4 (depends on 2) The method of claim 2, further comprising juxtaposing the second real part signal and the second imaginary part signal on which the DC bias has been performed. ### Claim 5 (depends on 1) The method of claim 1, wherein in the partial signal, the part is ½. ### Claim 6 (depends on 4) The method of claim 4, wherein each of the second real part signal and the second imaginary part signal on which the DC bias has been performed is a real value signal. ### Claim 7 A transmission stage for transmitting a signal in a wireless communication system, comprising: a radio frequency (RF) module for transmitting and receiving radio signals; and a processor configured to control the RF module, wherein the processor is configured to: generate at least one bit as a complex value symbol by using a modulation scheme; map the complex value symbol to subcarriers having an even index or subcarriers having an odd index among subcarriers of at least one configured resource block (RB); perform an inverse fast Fourier transform (IFFT) on the subcarriers to which the complex value symbol has been mapped in order to generate a time continuous signal including a first real part signal and a first imaginary part signal; generate a second real part signal and a second imaginary part signal based on a partial signal in each of the first real part signal and the first imaginary part signal; perform a direct current (DC) bias on the time continuous signal based on the second real part signal and the second imaginary part signal; and transmit the DC-biased signal. ### Claim 8 (depends on 7) The transmission stage of claim 7, wherein the processor is configured to perform the DC bias by applying a first value and a second value to the second real part signal and the second imaginary part signal, respectively. ### Claim 9 (depends on 8) The transmission stage of claim 8, wherein the first value is a minimum value of the second real part signal, and wherein the second value is a minimum value of the second imaginary part signal. ### Claim 10 (depends on 8) The transmission stage of claim 8, wherein the processor is configured to juxtapose the second real part signal and the second imaginary part signal on which the DC bias has been performed.