MODULATION AND EQUALIZATION IN AN ORTHONORMAL TIME-FREQUENCY SHIFTING COMMUNICATIONS SYSTEM

• US 20140169385A1
• Filed: 06/25/2013
• Published: 06/19/2014
• Est. Priority Date: 05/26/2011
• Status: Active Grant

• Current Assignee: Cohere Technologies Inc
• Original Assignee: Cohere Technologies Inc
• Inventors: Hadani, Ronny, Rakib, Salim Shlomo
• Granted Patent: US 9,590,779 B2
• Time in Patent Office: Days
• US Class Current: 370/436
• CPC Class Codes: H04L 23/02 adapted for orthogonal signalling
• CPC Class Codes: H04L 25/03834 using pulse shaping
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 27/2697 in combination with other modulation techniques
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

A system and method of providing a modulated signal useable in a signal transmission system. The method includes transforming, perhaps with respect to both time and frequency, a data frame including a plurality of data elements into a transformed data matrix. The transformed data matrix includes a plurality of transformed data elements where each of the plurality of transformed data elements is based upon each of the plurality of data elements. The method further includes generating the modulated signal in accordance with the transformed data elements of the transformed data matrix.

Claims

1. A method of providing a modulated signal useable in a signal transmission system, the method comprising:

transforming a data frame including a plurality of data elements into a transformed data matrix having a plurality of transformed data elements wherein ones of the plurality of transformed data elements are based upon multiple ones of the plurality of data elements; and

generating the modulated signal in accordance with the transformed data elements of the transformed data matrix.

2. The method of claim 1 wherein the transforming includes transforming ones of the plurality of data elements with respect to both time and frequency.

3. The method of claim 1 wherein the data frame has a first dimension of N data elements and a second dimension of N data elements, wherein N is greater than one.

4. The method of claim 3 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of N transformed data elements.

5. The method of claim 1 wherein the generating includes selecting the transformed data elements of the transformed data matrix on a column-by-column basis.

6. A method of providing a modulated signal useable in a signal transmission system, the method comprising:

transforming a data frame including a plurality of data elements into a transformed data matrix having a plurality of transformed data elements wherein each of the plurality of transformed data elements is based upon each of the plurality of data elements; and

generating the modulated signal in accordance with the transformed data elements of the transformed data matrix.

7. The method of claim 6 wherein each of the plurality of transformed data elements includes a weighted contribution corresponding to each of the plurality of data elements.

8. The method of claim 6 wherein the transforming includes transforming each of the plurality of data elements with respect to both time and frequency.

9. The method of claim 6 wherein the data frame has a first dimension of N data elements and a second dimension of N data elements, wherein N is greater than one.

10. The method of claim 9 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of N transformed data elements.

11. The method of claim 6 wherein the generating includes selecting the transformed data elements of the transformed data matrix on a column-by-column basis.

12. A signal transmitter for use in a communication system, the signal transmitter comprising:

an input port;

an output port;

a processor;

a memory including program code executable by the processor, the program code including;

code for receiving, at the input port, a data frame including a plurality of data elements;

code for transforming the data frame into a transformed data matrix having a plurality of transformed data elements wherein ones of the plurality of transformed data elements are based upon multiple ones of the plurality of data elements; and

code for generating a modulated signal in accordance with the transformed data elements of the transformed data matrix and for providing the modulated signal to the output port.

13. The signal transmitter of claim 12 wherein the program code further includes code for transforming ones of the plurality of data elements with respect to both time and frequency.

14. The signal transmitter of claim 12 wherein the data frame has a first dimension of N data elements and a second dimension of N data elements, wherein N is greater than one.

15. The signal transmitter of claim 12 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of N transformed data elements.

16. The signal transmitter of claim 12 wherein the program code further includes code for selecting the transformed data elements of the transformed data matrix on a column-by-column basis.

34. The signal transmitter of claim 12 further including transmitter circuitry for modulating a carrier signal in accordance with the modulated signal.

17. A signal transmitter for use in a communication system, the signal transmitter comprising:

an input port;

an output port;

a processor;

a memory including program code executable by the processor, the program code including;

code for receiving, at the input port, a data frame including a plurality of data elements;

code for transforming the data frame into a transformed data matrix having a plurality of transformed data elements wherein each of the plurality of transformed data elements is based upon each of the plurality of data elements;

code for generating a modulated signal in accordance with the transformed data elements of the transformed data matrix.

18. The signal transmitter of claim 17 wherein each of the plurality of transformed data elements includes a weighted contribution corresponding to each of the plurality of data elements.

19. The signal transmitter of claim 17 wherein the program code includes code for transforming each of the plurality of data elements with respect to both time and frequency.

20. The signal transmitter of claim 17 wherein the data frame has a first dimension of N data elements and a second dimension of N data elements, wherein N is greater than one.

21. The signal transmitter of claim 20 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of N transformed data elements.

22. The signal transmitter of claim 17 wherein the program code includes code for selecting the transformed data elements of the transformed data matrix on a column-by-column basis.

24. The non-transitory computer readable medium of claim 22 wherein the program instructions further include instructions for transforming ones of the plurality of data elements with respect to both time and frequency.

23. A non-transitory computer readable medium including program instructions for execution by a processor in a signal transmitter, the program instructions comprising instructions for causing the processor to:

receive, at an input port of the signal transmitter, a data frame including a plurality of data elements;

transform the data frame into a transformed data matrix having a plurality of transformed data elements wherein ones of the plurality of transformed data elements are based upon multiple ones of the plurality of data elements; and

generate a modulated signal in accordance with the transformed data elements of the transformed data matrix.

25. The non-transitory computer readable medium of claim 23 wherein the data frame has a first dimension of N data elements and a second dimension of N data elements, wherein N is greater than one.

26. The non-transitory computer readable medium claim 23 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of N transformed data elements.

27. The non-transitory computer readable medium claim 23 wherein the program instructions further include instructions for causing the processor to transform data elements of the transformed data matrix on a column-by-column basis.

28. A non-transitory computer readable medium including program instructions for execution by a processor in a signal transmitter, the program instructions comprising instructions for causing the processor to:

receive, at an input port of the signal transmitter, a data frame including a plurality of data elements;

transform the data frame into a transformed data matrix having a plurality of transformed data elements wherein each of the plurality of transformed data elements is based upon each of the plurality of data elements; and

generate a modulated signal in accordance with the transformed data elements of the transformed data matrix.

29. The non-transitory computer readable medium claim 28 wherein each of the plurality of transformed data elements includes a weighted contribution corresponding to each of the plurality of data elements.

30. The non-transitory computer readable medium claim 28 wherein the program instructions further include instructions for causing the processor to transform each of the plurality of data elements with respect to both time and frequency.

31. The non-transitory computer readable medium claim 28 wherein the data frame has a first dimension of N data elements and a second dimension of N data elements, wherein N is greater than one.

32. The non-transitory computer readable medium claim 31 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of N transformed data elements.

33. The non-transitory computer readable medium claim 28 wherein the program instructions further include instructions for causing the processor to select the transformed data elements of the transformed data matrix on a column-by-column basis.