# US 12,184,459 B2 · Multi-layer transmission and reception method in 1-bit quantization 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 12,184,459 B2 - Document ID: US12184459B2 - Status: Granted - Kind: B2 - Application number: 17/767,025 - Filed: 2019-10-07 - Published: 2022-12-08 - Granted: 2024-12-31 - Earliest claimed: 2019-10-07 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sangrim Lee; Hojae Lee - Web page: https://patentgrep.com/patent/US12184459B2 ## CPC - H04L 27/18: Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence) - H04L 27/227: using coherent demodulation - 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 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 27/20: Modulator circuits; Transmitter circuits - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Disclosed are a multi-layer transmission and reception method in a communication system based on 1-bit quantization in a wireless communication system, and an apparatus for supporting same. Particularly, a method by which a first device transmits and receives a signal in a wireless communication system comprises the steps of: receiving a reference signal (RS) from a second device; generating a demodulation reference vector on the basis of the RS; and receiving a data signal from the second device by using the demodulation reference vector, wherein the RS can be generated differently according to the modulation of the data signal. ## Claims ### Claim 1 A method of transmitting and receiving a signal, by a first device, in a wireless communication system, the method comprising: receiving, from a second device, a reference signal (RS); generating a demodulation reference vector based on the reference signal; and receiving, from the second device, a data signal based on the demodulation reference vector, wherein the reference signal is generated differently based on a modulation method of the data signal, and wherein the reference signal is received in time slots which is determined based on modulation order and a number of layers of the data signal. ### Claim 2 (depends on 1) The method of claim 1, wherein the time slots is determined by {(the modulation order of the data signal){circumflex over ( )}(the number of layers−1)}. ### Claim 3 (depends on 2) The method of claim 2, wherein at least one of reference signals received in a specific time slot has a phase difference of {2pi (π)/modulation order of the data signal} with a reference signal received in a previous time slot. ### Claim 4 (depends on 1) The method of claim 1, wherein the modulation method of the data signal is BPSK (Binary Phase Shift Keying) or QPSK (Quadrature Phase Shift Keying). ### Claim 5 (depends on 4) The method of claim 4, wherein based on the modulation method of the data signal being the BPSK, the demodulation reference vector is generated by rotating the reference signal in pi(π) unit. ### Claim 6 (depends on 4) The method of claim 4, wherein based on the modulation method of the data signal being the QPSK, the demodulation reference vector is generated by rotating the reference signal in pi(π)/2 unit. ### Claim 7 (depends on 1) The method of claim 1, wherein the receiving the data signal comprises: calculating a log likelihood ratio (LLR) of the data signal based on the demodulation reference vector. ### Claim 8 (depends on 1) The method of claim 1, wherein each receive path of the first device includes a 1-bit analog to digital converter (ADC), and wherein the reference signal and the data signal are quantized through the 1-bit ADC. ### Claim 9 A method of transmitting and receiving a signal, by a first device, in a wireless communication system, the method comprising: transmitting, to a second device, a reference signal (RS); transmitting, to the second device, a data signal, wherein the reference signal is generated differently based on a modulation method of the data signal, and wherein is transmitted in time slots which is determined based on modulation order and a number of layers of the data signal. ### Claim 10 (depends on 9) The method of claim 9, wherein the time slots is determined by {(the modulation order of the data signal){circumflex over ( )}(the number of layers−1)}. ### Claim 11 (depends on 10) The method of claim 10, wherein at least one of reference signals received in a specific time slot has a phase difference of {2pi(π)/modulation order of the data signal} with a reference signal received in a previous time slot. ### Claim 12 (depends on 10) The method of claim 10, wherein a transmission order of the reference signal is independent of a demodulation of the data signal. ### Claim 13 A first device for transmitting and receiving a signal in a wireless communication system, the first device comprising: transmission and reception unit for transmitting and receiving a radio signal; and a processor functionally connected to the transmission and reception unit, wherein the processor is configured to: receiving, from a second device, a reference signal (RS); generating a demodulation reference vector based on the reference signal; and receiving, from the second device, a data signal based on the demodulation reference vector, wherein the reference signal is generated differently based on a modulation method of the data signal, and wherein the reference signal is received in time slots which is determined based on modulation order and a number of layers of the data signal.