Transpositional modulation

• US 10,454,727 B2
• Filed: 01/26/2018
• Issued: 10/22/2019
• Est. Priority Date: 04/13/2017
• Status: Active Grant

• Current Assignee: TM IP Holdings LLC
• Original Assignee: TM IP Holdings LLC
• Inventors: Woodsum, Harvey C., Gerdes, Richard C.
• Primary Examiner(s): Tran, Khai
• Application Number:
  US15/880,766
• Publication Number:
  US 20180302263A1
• Time in Patent Office: 634 Days
• Field of Search: 375269, 375259, 375268, 375316, 375362
• CPC Class Codes: H04B 14/004 Amplitude modulation
• CPC Class Codes: H04B 14/006 Angle modulation
• CPC Class Codes: H04B 14/08 characterised by the use of a sub-carrier
• CPC Class Codes: H04L 2027/0051 Harmonic tracking
• CPC Class Codes: 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
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04L 27/34 Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems

Abstract

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for modulating and demodulating transpositional modulated (TM) signals. One aspect features a method of modulating a carrier signal that include the actions of generating a TM signal by generating a sinusoidal signal, and modulating the sinusoidal signal based on a data signal to provide the TM signal. Inserting the TM signal into a carrier signal to provide a TM modulated carrier signal. Modulating the TM modulated carrier signal with a non-TM signal to provide a combined signal. Transmitting the combined signal.

Claims

1. A method of modulating a carrier signal, the method comprising:

generating a transpositional modulation (TM) signal by;

generating a sinusoidal signal; and

modulating an amplitude of the sinusoidal signal based on a data signal to provide the TM signal;

inserting the TM signal into a carrier signal to provide a TM modulated carrier signal; and

transmitting the TM modulated carrier signal.

2. The method of claim 1, wherein inserting the TM signal into the carrier signal comprises inserting the TM signal into a phase of the carrier signal to provide a TM modulated carrier signal.

3. The method of claim 2, wherein the TM signal is inserted into the phase of the carrier signal by adding the TM signal to the phase of the carrier signal.

4. The method of claim 1, wherein inserting the TM signal into the carrier signal comprises inserting the TM signal into a frequency of the carrier signal to provide a TM modulated carrier signal.

5. The method of claim 4, wherein the TM signal is inserted into the frequency of the carrier signal by adding the TM signal to the frequency of the carrier signal.

6. The method claim 1, wherein modulating the sinusoidal signal based on the data signal to provide the TM signal comprises modulating a phase of the sinusoidal signal based on the data signal to provide the TM signal.

7. The method of claim 6, wherein modulating the phase of the sinusoidal signal based on the data signal to provide the TM signal comprises altering the phase of the sinusoidal signal by discrete phase shifts for each data value in the data signal.

8. The method of claim 7, wherein changes in values of the discrete phase shifts are timed to correspond with an integer multiple of a period of the sinusoidal signal.

9. The method of claim 7, wherein each discrete phase shift is a TM symbol that represents a data value of the data signal.

10. The method of claim 1, wherein modulating the sinusoidal signal based on the data signal comprises modulating both a phase and the amplitude of the sinusoidal signal based on the data signal to provide the TM signal.

11. The method of claim 1, wherein a symbol period of the TM signal is an integer multiple of a period of the sinusoidal signal.

12. The method of claim 1, further comprising, before transmitting the TM modulated carrier signal, filtering the TM modulated carrier signal.

13. The method of claim 1, wherein the carrier signal is an intermediate frequency carrier signal and the method further comprises upshifting the TM modulated carrier signal to a frequency of a transmission carrier signal.

14. The method of claim 1, wherein a symbol period of the TM signal is an integer multiple of a period of the carrier signal.

15. A transmitter comprising:

at least one processor; and

a data store coupled to the at least one processor having instructions stored thereon which, when executed by the at least one processor, causes the at least one processor to perform operations comprising;

generating a transpositional modulation (TM) signal by;

generating a sinusoidal signal; and

modulating an amplitude of the sinusoidal signal based on a data signal to provide the TM signal;

inserting the TM signal into a carrier signal to provide a TM modulated carrier signal; and

transmitting the TM modulated carrier signal.

16. The transmitter of claim 15, wherein inserting the TM signal into the carrier signal comprises inserting the TM signal into a phase of the carrier signal to provide a TM modulated carrier signal.

17. The transmitter of claim 16, wherein the TM signal is inserted into the phase of the carrier signal by adding the TM signal to the phase of the carrier signal.

18. The transmitter of claim 15, wherein inserting the TM signal into the carrier signal comprises inserting the TM signal into a frequency of the carrier signal to provide a TM modulated carrier signal.

19. The transmitter of claim 18, wherein the TM signal is inserted into the frequency of the carrier signal by adding the TM signal to the frequency of the carrier signal.

20. The transmitter of claim 15, wherein modulating the sinusoidal signal based on the data signal to provide the TM signal comprises modulating a phase of the of the sinusoidal signal based on the data signal to provide the TM signal.

21. The transmitter of claim 20, wherein modulating the phase of the sinusoidal signal based on the data signal to provide the TM signal comprises altering the phase of the sinusoidal signal by discrete phase shifts for each data value in the data signal.

22. The transmitter of claim 21, wherein changes in values of the discrete phase shifts are timed to correspond with an integer multiple of a period of the sinusoidal signal.

23. The transmitter of claim 21, wherein each discrete phase shift is a TM symbol that represents a data value of the data signal.

24. The transmitter of claim 15, wherein modulating the sinusoidal signal based on the data signal comprises modulating both a phase and the amplitude of the sinusoidal signal based on the data signal to provide the TM signal.

25. The transmitter of claim 15, wherein a symbol period of the TM signal is an integer multiple of a period of the sinusoidal signal.

26. The transmitter of claim 15, further comprising, before transmitting the TM modulated carrier signal, filtering the TM modulated carrier signal.

27. The transmitter of claim 15, wherein the carrier signal is an intermediate frequency carrier signal and the operations further comprise upshifting the TM modulated carrier signal to a frequency of a transmission carrier signal.

28. The transmitter of claim 15, wherein the at least one processor includes one of:

a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a software defined radio (SDR).