# US 10,310,063 B2 · Calibration of a multifunctional automotive radar system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,310,063 B2 - Document ID: US10310063B2 - Status: Granted - Kind: B2 - Application number: 15/150,831 - Filed: 2016-05-10 - Published: 2016-11-17 - Granted: 2019-06-04 - Earliest claimed: 2015-05-12 - Assignees: MaxLinear, Inc. - Applicants: Maxlinear, Inc. - Inventors: Curtis Ling - Web page: https://patentgrep.com/patent/US10310063B2 ## CPC - G01S 13/0209: {Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband} - G01S 7/0236: {Avoidance by space multiplex} - G01S 13/003: {Bistatic radar systems; Multistatic radar systems} - G01S 13/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46) - G01S 13/87: Combinations of radar systems, e.g. primary radar and secondary radar - 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 13/931: of land vehicles - G01S 7/006: {using shared front-end circuitry, e.g. antennas (G01S13/765, G01S13/825 take precedence)} - G01S 13/60: wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track (G01S13/64 takes precedence) - G01S 13/86: Combinations of radar systems with non-radar systems, e.g. sonar, direction finder - G01S 13/89: for mapping or imaging - G01S 2013/93271: {in the front of the vehicles} - G01S 2013/93272: {in the back of the vehicles} - G01S 2013/93273: {on the top of the vehicles} - G01S 2013/93274: {on the side of the vehicles} - G01S 2013/93275: {in the bumper area} - G01S 2013/93276: {in the windshield area} - 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 ## Abstract A multifunctional radar transmitter may comprise bus interface circuitry and beamforming circuitry. The beamforming circuitry, with use of a plurality of beamforming coefficients, is operable to process a plurality of baseband signals to generate a millimeter wave radar burst corresponding to a radiation pattern that comprises a first lobe and a second lobe, where the first lobe is at a first angle and the second lobe is at a second angle. The bus interface circuitry is operable to receive, from a first receiver, an indication of interference from the second lobe present at the first receiver. The beamforming circuitry is operable to adjust, based on the indication of interference, the beamforming coefficients such that the second lobe is redirected to a third angle. ## Claims ### Claim 1 A system comprising: a multifunctional radar transmitter that comprises bus interface circuitry and beamforming circuitry, wherein: the beamforming circuitry, with use of a plurality of beamforming coefficients, is operable to process a plurality of baseband signals to generate a millimeter wave radar burst corresponding to a radiation pattern that comprises a first lobe and a second lobe, wherein the first lobe is at a first angle intended for a first receiver and the second lobe is at a second angle intended to be transmitted away from the first receiver; the bus interface circuitry is operable to receive, from the first receiver, an indication of interference from the second lobe present at the first receiver; and the beamforming circuitry is operable to adjust, based on the indication of interference, the beamforming coefficients such that the second lobe is redirected away from the first receiver to a third angle. ### Claim 2 (depends on 1) The system of claim 1, wherein the multifunctional radar transmitter comprises signal processing circuitry operable to: receive a first datastream intended for the first receiver; and process the first datastream to generate the plurality of baseband signals. ### Claim 3 (depends on 2) The system of claim 2, wherein the processing of the first datastream comprises performance of one or more of: forward error correction encoding, bit-to-symbol mapping, frequency mapping, and an inverse Fourier transform. ### Claim 4 (depends on 2) The system of claim 2, wherein the signal processing circuitry is operable to: receive a second datastream intended for the first receiver; and process the second datastream to generate the plurality of baseband signals. ### Claim 5 (depends on 4) The system of claim 4, wherein: energy corresponding to the first datastream predominates on the first lobe; and energy corresponding to the second datastream predominates on the second lobe. ### Claim 6 (depends on 1) The system of claim 1, wherein the multifunctional radar transmitter comprises front-end circuitry operable to modulate an output of the beamforming circuitry onto one or more millimeter wave carrier signals to generate a plurality of modulated millimeter wave signals corresponding to the millimeter wave radar burst. ### Claim 7 (depends on 1) The system of claim 1, wherein the indication of interference is a representation of received signal strength of energy from the second lobe. ### Claim 8 (depends on 1) The system of claim 1, wherein the beamforming circuitry is operable to cycle through a plurality of settings of the beamforming coefficients during a calibration interval such that the first lobe and second lobe sweep over a range of angles during the calibration interval. ### Claim 9 (depends on 1) The system of claim 1, wherein the first receiver is operable to separate a first received signal corresponding to the first lobe and a second received signal corresponding to the second lobe. ### Claim 10 (depends on 9) The system of claim 9, wherein the first receiver comprises signal processing circuitry operable to: process the first received signal to determine a speed and/or location of an object off of which the first received signal reflected; and demodulate the first received signal to recover information modulated on the first received signal. ### Claim 11 A method comprising: processing, by beamforming circuitry of a multifunctional radar transmitter using a plurality of beamforming coefficients, a plurality of baseband signals to generate a millimeter wave radar burst corresponding to a radiation pattern that comprises a first lobe and a second lobe, wherein the first lobe is at a first angle intended for a first receiver and the second lobe is at a second angle intended to be transmitted away from the first receiver; receiving, from the first receiver by bus interface circuitry of the multifunctional radar transmitter, an indication of interference from the second lobe present at the first receiver; and adjusting, by the beamforming circuitry based on the indication of interference, the beamforming coefficients such that the second lobe is redirected away from the first receiver to a third angle. ### Claim 12 (depends on 11) The method of claim 11, comprising: receiving, by signal processing circuitry of the multifunctional radar transmitter, a first datastream intended for the first receiver; and processing, by the signal processing circuitry, the first datastream to generate the plurality of baseband signals. ### Claim 13 (depends on 12) The method of claim 12, wherein the processing of the first datastream comprises performing one or more of: forward error correction encoding, bit-to-symbol mapping, frequency mapping, and an inverse Fourier transform. ### Claim 14 (depends on 12) The method of claim 12, comprising: receiving, by the signal processing circuitry, a second datastream intended for the first receiver; and processing, by the signal processing circuitry, the second datastream to generate the plurality of baseband signals. ### Claim 15 (depends on 14) The method of claim 14, wherein: energy corresponding to the first datastream predominates on the first lobe; and energy corresponding to the second datastream predominates on the second lobe. ### Claim 16 (depends on 11) The method of claim 11, comprising modulating, by front-end circuitry of the multifunctional radar transmitter, an output of the beamforming circuitry onto one or more millimeter wave carrier signals to generate a plurality of modulated millimeter wave signals corresponding to the millimeter wave radar burst. ### Claim 17 (depends on 11) The method of claim 11, wherein the indication of interference is a representation of received signal strength of energy from the second lobe. ### Claim 18 (depends on 11) The method of claim 11, comprising cycling, by the beamforming circuitry, through a plurality of settings of the beamforming coefficients during a calibration interval such that the first lobe and second lobe sweep over a range of angles during the calibration interval. ### Claim 19 (depends on 11) The method of claim 11, comprising separating, by the first receiver, a first received signal corresponding to the first lobe and a second received signal corresponding to the second lobe. ### Claim 20 (depends on 19) The method of claim 19, comprising: processing, by signal processing circuitry of the first receiver, the first received signal to determine a speed and/or location of an object off of which the first received signal reflected; and demodulating, by the signal processing circuitry, the first received signal to recover information modulated on the first received signal.