# US 12,000,928 B2 · Joint frequency-and-phase modulation for multi-antenna backscatter vehicular position > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,928 B2 - Document ID: US12000928B2 - Status: Granted - Kind: B2 - Application number: 17/434,596 - Filed: 2020-03-02 - Published: 2022-04-21 - Granted: 2024-06-04 - Earliest claimed: 2019-03-01 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Seungmin Lee; Seungwoo Ko; Kaifeng Han; Kaibin Huang - Web page: https://patentgrep.com/patent/US12000928B2 ## CPC - G01S 13/931: of land vehicles - H04B 5/77: for interrogation - H04L 5/0023: {Time-frequency-space} - H04L 27/10: Frequency-modulated carrier systems, i.e. using frequency-shift keying (H04L27/32 takes precedence) - H04L 27/18: Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence) - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - G01S 13/751: {wherein the responder or reflector radiates a coded signal} - G01S 13/84: for distance determination by phase measurement - G01S 13/878: {Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector (G01S13/874 takes precedence)} - G01S 2013/9316: {combined with communication equipment with other vehicles or with base stations} - G01S 2013/9325: {for inter-vehicle distance regulation, e.g. navigating in platoons} - H04L 5/0005: {Time-frequency} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/001: {the frequencies being arranged in component carriers} - 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 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0057: {Physical resource allocation for CQI} - H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H04B: TRANSMISSION - 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 method of performing a positioning of a first apparatus by the first apparatus, transmitting a first signal to a second apparatus through at least one antenna; receiving a second signal from the second apparatus through each of the at least one antenna, wherein the second signal includes a bit related with a tag identifier(ID) of the second apparatus; obtaining the tag ID of the second apparatus, which is related with absolute location information of the second apparatus, based on the bit; and performing the positioning of the first apparatus, based on the first signal, the second signal, and the tag ID of the second apparatus. ## Claims ### Claim 1 A method of performing a positioning of a first apparatus by the first apparatus, the method comprising: transmitting a first signal to a second apparatus through at least one antenna; receiving a second signal from the second apparatus through each of the at least one antenna, wherein the second signal includes a bit related with a tag identifier (ID) of the second apparatus; obtaining the tag ID of the second apparatus, which is related to absolute location information of the second apparatus, based on the bit; and performing the positioning of the first apparatus, based on the first signal, the second signal, and the tag ID of the second apparatus,. wherein a frequency and a phase of the second signal are the same frequency and phase of the first signal. ### Claim 2 (depends on 1) The method of claim 1, wherein a total number of the first signal is the same as the number of the at least one antenna. ### Claim 3 (depends on 1) The method of claim 1, wherein a number of the second signal is the same as the number of the at least one antenna. ### Claim 4 (depends on 1) The method of claim 1, wherein a frequency of the first signal is linearly increased from a start frequency in proportion to time, repeated for every sweep duration. ### Claim 5 (depends on 4) The method of claim 4, wherein the phase of the first signal is constant during the sweep duration, and wherein the phase of the first signal is increased by a size of a first phase for every sweep duration. ### Claim 6 (depends on 1) The method of claim 1, wherein the frequency of the first signal is linearly increased from a start frequency in proportion to time during a first sweep duration, linearly decreased to the start frequency in proportion to time during a second sweep duration, and repeated for every two sweep durations. ### Claim 7 (depends on 6) The method of claim 6, wherein the phase of the first signal is constant during the sweep duration, wherein a size of the phase of the first signal is increased by a size of a first phase for every sweep duration, and wherein a sign of the phase of the first signal is reversed for every sweep duration. ### Claim 8 (depends on 1) The method of claim 1, further comprising: obtaining a beat rate (BR) which is a vibrating frequency of a beat signal, by multiplying the first signal and the second signal through a mixer, wherein the beat signal is a result of the multiplying of the first and the second signal, and wherein the positioning of the first apparatus is performed based on the BRs. ### Claim 9 (depends on 1) The method of claim 1, wherein a total number of sweep duration repetitions is larger than a number of the at least one antenna. ### Claim 10 (depends on 8) The method of claim 8, further comprising: digitalizing the beat signal through an analog to digital converter(ADC), wherein the positioning of the first apparatus is based on the digitalized beat signal. ### Claim 11 (depends on 10) The method of claim 10, further comprising: performing a two-dimensional Fourier-Transformation(2D_FT) using the digitalized beat signal, wherein the positioning of the first apparatus is based on a result of the 2D_FT. ### Claim 12 (depends on 11) The method of claim 11, further comprising: based on the result of the 2D_FT, estimating a distance and an angle between the at least one antenna and the second apparatus; and based on the distance and the angle between the at least one antenna and the second apparatus, estimating a relative position of the at least one antenna from the second apparatus, wherein the positioning of the first apparatus is based on the relative position of the at least one antenna. ### Claim 13 A first apparatus for performing wireless communication, the first apparatus comprising: at least one memory for storing instructions; at least one transceiver; and at least one processor connected to the at least one memory and the at least one transceiver, wherein the processor executes the instructions to: transmit a first signal to a second apparatus through at least one antenna; receive a second signal from the second apparatus through each of the at least one antenna, wherein the second signal includes a bit related with a tag identifier (ID) of the second apparatus; obtain the tag ID of the second apparatus, which is related to absolute location information of the second apparatus, based on the bit; and perform a positioning of the first apparatus, based on the first signal, the second signal, and the tag ID of the second apparatus, wherein a frequency and a phase of the second signal are the same frequency and phase of the first signal. ### Claim 14 An apparatus configured to control a first user equipment (UE), the apparatus comprising: at least one processor; at least one memory operably connectable to the at least one processor and storing instructions, wherein the at least one processor executes the instructions to: transmit a first signal to a second apparatus through at least one antenna; receive a second signal from the second apparatus through each of the at least one antenna, wherein the second signal includes a bit related with a tag identifier(ID) of the second apparatus; obtain the tag ID of the second apparatus, which is related to absolute location information of the second apparatus, based on the bit; and perform a positioning of the first apparatus, based on the first signal, the second signal, and the tag ID of the second apparatus, wherein a frequency and a phase of the second signal are the same frequency and phase of the first signal.