# US 9,883,375 B2 · Identifying devices with transpositional modulation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,883,375 B2 - Document ID: US9883375B2 - Status: Granted - Kind: B2 - Application number: 15/655,380 - Filed: 2017-07-20 - Published: 2017-11-09 - Granted: 2018-01-30 - Earliest claimed: 2016-04-20 - Assignees: TM IP Holdings, LLC - Applicants: Tm IP Holdings, LLC - Inventors: Richard C. Gerdes; Daniel L. Hodges; Quinn Colin McIntosh - Web page: https://patentgrep.com/patent/US9883375B2 ## CPC - H04W 8/22: Processing or transfer of terminal data, e.g. status or physical capabilities - G01S 7/003: {Transmission of data between radar, sonar or lidar systems and remote stations} - G01S 13/765: {with exchange of information between interrogator and responder} - H04W 8/005: {Discovery of network devices, e.g. terminals} - H04L 27/0012: {arrangements for identifying the type of modulation} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - 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 - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for transmitting, by a first device, a transmission signal that includes a carrier signal modulated with a TM signal. Receiving a response signal from a second device in response to the transmission signal. Determining, whether the response signal includes the TM signal. ## Claims ### Claim 1 A non-transitory computer readable storage medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform operations comprising: controlling a transmitter of a first device to transmit a transmission signal that includes a carrier signal modulated with a TM signal, wherein the TM signal is a carrier modulated signal that conveys information by altering a harmonic of the carrier signal and not directly altering an amplitude, a phase, or a frequency of the carrier signal; receiving, from the receiver, a response signal from a second device in response to the transmission signal; and determining, by the first device, whether the response signal includes the TM signal. ### Claim 2 (depends on 1) The medium of claim 1, wherein the operations further comprise determining that the second device is a TM capable device based on determining that the response signal includes the TM signal. ### Claim 3 (depends on 1) The medium of claim 1, wherein determining whether the response signal includes transpositional modulation comprises mixing the response signal with a second harmonic of a carrier signal of the response signal to produce a mixed signal. ### Claim 4 (depends on 3) The medium of claim 3, wherein determining whether the response signal includes transpositional modulation comprises comparing the mixed signal to a third harmonic of the carrier signal of the response signal. ### Claim 5 (depends on 1) The medium of claim 1, wherein the transmission signal includes the carrier signal modulated with the TM signal and a non-TM modulation signal. ### Claim 6 (depends on 1) The medium of claim 1, wherein determining whether the response signal includes transpositional modulation comprises performing a separation and extraction (SEPEX) process on the response signal to separate the transpositional modulation from other signals. ### Claim 7 (depends on 1) The medium of claim 1, wherein the transmission signal includes the carrier signal modulated with a first TM signal, and wherein determining whether the response includes transpositional modulation comprises determining whether the response signal includes a second, different TM signal. ### Claim 8 (depends on 7) The medium of claim 7, wherein the operations further comprise demodulating the second TM signal to retrieve information about the second device. ### Claim 9 (depends on 8) The medium of claim 8, wherein the information includes information identifying the second device. ### Claim 10 (depends on 8) The medium of claim 8, wherein the information includes information identifying characteristics of the second device. ### Claim 11 (depends on 1) The medium of claim 1, wherein the transmission signal is a RADAR signal. ### Claim 12 (depends on 2) The medium of claim 2, wherein the operations further comprise conducting communications with the second device using TM signals. ### Claim 13 (depends on 2) The medium of claim 2, wherein the operations further comprise conducting communications with the second device using a combination of TM signals and non-TM signals. ### Claim 14 A method for identifying transpositional modulation (TM) capable devices, the method comprising: receiving a transmission signal from a first device, the transmission signal including a carrier signal modulated with a first transpositional modulation (TM) signal, wherein the TM signal is a carrier modulated signal that conveys information by altering a harmonic of the carrier signal and not directly altering an amplitude, a phase, or a frequency of the carrier signal; identifying the first TM signal within the transmission signal; and controlling a transmitter of a second device to send, to the first device, a response signal that includes data encoded within a second TM signal. ### Claim 15 (depends on 14) The medium of claim 14, wherein the response signal includes a non-TM modulation signal. ### Claim 16 (depends on 14) The medium of claim 14, wherein identifying the first TM signal within the transmission signal comprises performing a separation and extraction (SEPEX) process on the transmission signal to separate the transpositional modulation from other signals. ### Claim 17 (depends on 14) The medium of claim 14, wherein the data encoded within the second TM signal includes information about the communication device. ### Claim 18 (depends on 17) The medium of claim 17, wherein the information includes information identifying characteristics of the second device. ### Claim 19 (depends on 17) The medium of claim 17, wherein the second device is installed on a vehicle, and wherein the information includes information about the vehicle. ### Claim 20 (depends on 19) The medium of claim 19, wherein the information includes data from a data recorder installed on the vehicle. ### Claim 21 (depends on 14) The medium of claim 14, wherein the operations further comprise conducting communications with the first device using TM signals. ### Claim 22 (depends on 14) The medium of claim 14, wherein the operations further comprise conducting communications with the first device using a combination of TM signals and non-TM signals.