# US 9,882,762 B2 · Transpositional modulation communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,762 B2 - Document ID: US9882762B2 - Status: Granted - Kind: B2 - Application number: 15/486,750 - Filed: 2017-04-13 - Published: 2017-10-26 - Granted: 2018-01-30 - Earliest claimed: 2016-04-26 - 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/US9882762B2 ## CPC - H04L 27/32: Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26 - H04L 27/0008: {arrangements for allowing a transmitter or receiver to use more than one type of modulation (negotiating modulation type for two-way transmission paths H04L5/1453)} - H04L 27/122: {using digital generation of carrier signals (digital function generators G06F1/02, H04L17/10; generating pulses having stepped portions using digital techniques H03K4/026)} - H04L 27/345: {Modifications of the signal space to allow the transmission of additional information} - H04L 27/36: Modulator circuits; Transmitter circuits - 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) - H04L 2027/0051: {Harmonic tracking} - 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 receiving, by a first device, a first signal from a second device, the first signal including a carrier signal modulated with a first modulation signal. Detecting a frequency of the carrier signal by performing a carrier extraction (CAREX) process on the first signal. Adding a second modulation signal to the carrier signal of the first signal to produce a combined signal, wherein the second modulation signal is a transpositional modulation (TM) signal and the first modulation signal is a non-TM signal. Transmitting the combined signal. ## Claims ### Claim 1 An electronic communication device comprising: a signal repeater coupled to an aerial drone, the signal repeater comprising: a signal receiver, and a signal transmitter, wherein the signal repeater is configured to perform operations comprising: receiving a first signal from a second device, the first signal including a carrier signal modulated with a first modulation signal; adding a second modulation signal to the carrier signal of the first signal to produce a combined signal, wherein the second modulation signal is a transpositional modulation (TM) signal and the first modulation signal is a non-TM signal; and transmitting the combined signal. ### Claim 2 (depends on 1) The electronic communication device of claim 1, wherein the operations further comprise receiving image data from a camera of the aerial drone and encoding the image data in the second modulation signal. ### Claim 3 (depends on 1) The electronic communication device of claim 1, wherein the operations further comprise receiving, from the second device, a third signal including information to be transmitted in the second modulation signal and encoding the information in the second modulation signal. ### Claim 4 (depends on 3) The electronic communication device of claim 3, wherein the third signal is a non-TM signal. ### Claim 5 (depends on 3) The electronic communication device of claim 3, wherein the third signal includes emergency services information. ### Claim 6 (depends on 1) The electronic communication device of claim 1, wherein the operations further comprise detecting a frequency of the carrier signal by performing a carrier extraction (CAREX) process on the first signal. ### Claim 7 (depends on 1) The electronic communication device of claim 1, wherein adding the second modulation signal to the carrier signal comprises: modulating a third harmonic signal of the carrier signal of the first signal with data to produce the second modulation signal; and combining the second modulation signal with the first signal. ### Claim 8 (depends on 1) The electronic communication device of claim 1, wherein adding the second modulation signal to the carrier signal comprises: generating a second harmonic signal of the carrier signal and a third harmonic signal of the carrier signal; modulating the third harmonic signal with a data signal; mixing the modulated third harmonic signal with the second harmonic signal to produce the second modulation signal; and combining the second modulation signal with the first signal. ### Claim 9 (depends on 8) The electronic communication device of claim 8, wherein the operations further comprise synchronizing a phase of the second modulation signal with a phase of the first signal. ### Claim 10 (depends on 1) The electronic communication device of claim 1, wherein the first modulation signal is one of phase modulation, frequency modulation, binary phase shift keying, quadrature phase-shift keying, amplitude modulation, or quadrature amplitude modulation. ### Claim 11 (depends on 6) The electronic communication device of claim 6, wherein detecting the frequency of the carrier signal comprises: detecting a center frequency of the first signal; detecting a frequency of a third signal; determining a difference signal between the center frequency of the first signal and the frequency of the third signal; modifying the frequency of the third signal based on the difference signal to provide the carrier signal. ### Claim 12 An aerial communication device comprising: a drone; a camera mounted on the drone; a signal repeater mounted on the drone and in communication with the camera, the signal repeater comprising: a signal receiver, and a signal transmitter, wherein the signal repeater is configured to perform operations comprising: receiving a first signal from a broadcast signal source, the first signal including a carrier signal modulated with a first modulation signal; receiving image data from the camera; encoding the image data in a second modulation signal; adding the second modulation signal to the carrier signal of the first signal to produce a combined signal, wherein the second modulation signal is a transpositional modulation (TM) signal and the first modulation signal is a non-TM signal; and transmitting the combined signal. ### Claim 13 (depends on 12) The aerial communication device of claim 12, wherein the operations further comprise receiving, from a second device, a third signal including information to be transmitted in the second modulation signal and encoding the information in the second modulation signal. ### Claim 14 (depends on 13) The aerial communication device of claim 13, wherein the third signal is a non-TM signal. ### Claim 15 (depends on 13) The aerial communication device of claim 13, wherein the third signal includes emergency services information. ### Claim 16 (depends on 12) The aerial communication device of claim 12, wherein the operations further comprise detecting a frequency of the carrier signal by performing a carrier extraction (CAREX) process on the first signal. ### Claim 17 (depends on 12) The aerial communication device of claim 12, wherein adding the second modulation signal to the carrier signal comprises: modulating a third harmonic signal of the carrier signal of the first signal with data to produce the second modulation signal; and combining the second modulation signal with the first signal. ### Claim 18 (depends on 12) The aerial communication device of claim 12, wherein adding the second modulation signal to the carrier signal comprises: generating a second harmonic signal of the carrier signal and a third harmonic signal of the carrier signal; modulating the third harmonic signal with a data signal; mixing the modulated third harmonic signal with the second harmonic signal to produce the second modulation signal; and combining the second modulation signal with the first signal. ### Claim 19 (depends on 18) The aerial communication device of claim 18, wherein the operations further comprise synchronizing a phase of the second modulation signal with a phase of the first signal. ### Claim 20 (depends on 16) The aerial communication device of claim 16, wherein detecting the frequency of the carrier signal comprises: detecting a center frequency of the first signal; detecting a frequency of a third signal; determining a difference signal between the center frequency of the first signal and the frequency of the third signal; modifying the frequency of the third signal based on the difference signal to provide the carrier signal.