# US 11,079,470 B2 · Radar modulation for radar sensing using a wireless communication chipset > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,470 B2 - Document ID: US11079470B2 - Status: Granted - Kind: B2 - Application number: 16/929,762 - Filed: 2020-07-15 - Published: 2020-11-05 - Granted: 2021-08-03 - Earliest claimed: 2017-05-31 - Assignees: Google Inc. - Applicants: Google LLC - Inventors: Jaime Lien; Changzhan Gu; Erik M. Olson - Web page: https://patentgrep.com/patent/US11079470B2 ## CPC - G01S 7/006: {using shared front-end circuitry, e.g. antennas (G01S13/765, G01S13/825 take precedence)} - G01S 7/023: {Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques (auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36)} - G01S 13/003: {Bistatic radar systems; Multistatic radar systems} - G01S 13/34: using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal - G01S 13/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46) - 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 Techniques and apparatuses are described that enable radar modulations for radar sensing using a wireless communication chipset. A controller initializes or controls modulations performed by the wireless communication chipset. In this way, the controller can enable the wireless communication chipset to perform modulations for wireless communication or radar sensing. In some cases, the controller can further select a wireless communication channel for setting a frequency and a bandwidth of a radar signal, thereby avoiding interference between multiple radar signals or between the radar signal and a communication signal. In other cases, the controller can cause the wireless communication chipset to modulate a signal containing communication data using a radar modulation. This enables another device that receives the signal to perform wireless communication or radar sensing. By utilizing these techniques, the wireless communication chipset can be used for wireless communication or radar sensing. ## Claims ### Claim 1 A method performed by a hardware chipset of a device, the method comprising: generating, via a transceiver of the hardware chipset, a radar signal by modulating a first signal based on a radar modulation type; transmitting, via an antenna of the hardware chipset, the radar signal to enable the radar signal to be used for radar sensing; generating, via the transceiver, a wireless communication signal by modulating a second signal based on a communication modulation type; transmitting, via the antenna, the wireless communication signal to enable wireless communication with another device; generating, via the transceiver, a multi-purpose signal by modulating a third signal based on the radar modulation type and modulating communication data onto the third signal; and transmitting, via the antenna, the multi-purpose signal to enable the multi-purpose signal to be used for wireless communication or radar sensing by the other device. ### Claim 2 (depends on 1) The method of claim 1, wherein the radar modulation type includes a linear-frequency modulation. ### Claim 3 (depends on 1) The method of claim 1, further comprising selecting a wireless communication channel to set a frequency and a bandwidth of the multi-purpose signal. ### Claim 4 (depends on 3) The method of claim 3, further comprising performing channel bonding using the wireless communication channel and another wireless communication channel to enable the bandwidth of the multi-purpose signal to encompass at least a portion of frequencies in the wireless communication channel and at least another portion of frequencies in the other wireless communication channel. ### Claim 5 (depends on 1) The method of claim 1, further comprising synchronizing the device that includes the hardware chipset and the other device that includes another hardware chipset to enable the device and the other device to operate as a bistatic radar using the multi-purpose signal or the radar signal. ### Claim 6 (depends on 5) The method of claim 5, further comprising: receiving, via the hardware chipset, another multi-purpose signal transmitted by the other device, the other multi-purpose signal including other communication data and being reflected by the target; extracting, via the hardware chipset, the communication data from the other multi-purpose signal; and performing digital beamforming to determine an angular position of the target based on the other multi-purpose signal that is received. ### Claim 7 (depends on 1) The method of claim 1, further comprising operating the hardware chipset according to a full-duplex operation to enable the hardware chipset to receive a reflected version of the multi-purpose signal during at least a portion of time that the multi-purpose signal is transmitted. ### Claim 8 (depends on 1) The method of claim 1, wherein: the transmitting of the radar signal and the wireless communication signal comprises transmitting a portion of the radar signal and a portion of the wireless communication signal at the same time; and the communication modulation type and the radar modulation type are orthogonal to each other to mitigate interference between the radar signal and the communication signal. ### Claim 9 (depends on 1) The method of claim 1, wherein the selecting of the radar modulation type and the selecting of the communication modulation type causes the radar signal and the communication signal to utilize disjoint wireless communication channels. ### Claim 10 (depends on 1) The method of claim 1, wherein the transmitting of the radar signal and the wireless communication signal comprises transmitting the radar signal and the wireless communication signal at different times. ### Claim 11 An apparatus comprising a hardware chipset configured to: generate a radar signal by modulating a first signal based on a radar modulation type; transmit the radar signal to enable the radar signal to be used for radar sensing; generate a wireless communication signal by modulating a second signal based on a communication modulation type; generate a multi-purpose signal by modulating a third signal based on the radar modulation type and modulating communication data onto the third signal; transmit the multi-purpose signal to enable the multi-purpose signal to be used for wireless communication or radar sensing by another apparatus. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the apparatus comprises a cellular phone. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the radar modulation type includes a linear-frequency modulation. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein the hardware chipset is configured to select a wireless communication channel to set a frequency and a bandwidth of the multi-purpose signal. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the hardware chipset is configured to perform channel bonding using the wireless communication channel and another wireless communication channel to enable the bandwidth of the multi-purpose signal to encompass at least a portion of frequencies in the wireless communication channel and at least another portion of frequencies in the other wireless communication channel. ### Claim 16 (depends on 11) The apparatus of claim 11, wherein the hardware chipset is configured to synchronize with another hardware chipset of the other apparatus to enable the hardware chip set and the other hardware chip set to operate as a bistatic radar using the multi-purpose signal or the radar signal. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the hardware chipset is configured to: receive another multi-purpose signal transmitted by the other hardware chipset, the other multi-purpose signal including other communication data and being reflected by an object; extract the communication data from the other multi-purpose signal; and perform digital beamforming to determine an angular position of the object based on the other multi-purpose signal that is received. ### Claim 18 (depends on 11) The apparatus of claim 11, wherein the hardware chipset is configured to perform a full-duplex operation to receive a reflected version of the multi-purpose signal during at least a portion of time that the multi-purpose signal is transmitted. ### Claim 19 (depends on 11) The apparatus of claim 11, wherein the hardware chipset comprises a transceiver and an antenna; and the hardware chipset is configured to generate and transmit the radar signal, the wireless communication signal, and the multi-purpose signal at different times using the transceiver and the antenna. ### Claim 20 (depends on 11) The apparatus of claim 11, wherein the hardware chipset comprises multiple transceivers and multiple antennas; and the hardware chipset is configured to generate and transmit the radar signal, the wireless communication signal, and the multi-purpose signal during a same time interval using the multiple transceivers and the multiple antennas.