Modulation and equalization in an orthonormal time-frequency shifting communications system

• US 9,660,851 B2
• Filed: 06/29/2015
• Issued: 05/23/2017
• Est. Priority Date: 05/28/2010
• Status: Active Grant

• Current Assignee: Cohere Technologies Inc
• Original Assignee: Cohere Technologies Inc
• Inventors: Hadani, Ronny, Rakib, Salim Shlomo
• Primary Examiner(s): NEFF, MICHAEL R
• Application Number:
  US14/754,596
• Publication Number:
  US 20160182269A1
• Time in Patent Office: 694 Days
• Field of Search: 375267
• CPC Class Codes: H04B 7/005 Control of transmission; Equalising
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04L 23/02 adapted for orthogonal signalling
• CPC Class Codes: H04L 25/03834 using pulse shaping
• CPC Class Codes: H04L 27/01 Equalisers baseband equalizers at the transmitter end H04L25/03343; in analogue transmission systems H04B3/04, H04B7/005
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2634 Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
• CPC Class Codes: H04L 27/26524 Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 27/2697 in combination with other modulation techniques
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0044 allocation of payload

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, 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 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of M transformed data elements, wherein N and M are greater than one, and further wherein the transforming includes transforming ones of the plurality of data elements with respect to both time and frequency;

generating a modulated signal in accordance with the transformed data elements of the transformed data matrix; and

transmitting, from at least one antenna of a wireless device, the modulated signal using a carrier signal.

2. The method of claim 1 where N is equal to M.

3. A 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 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of M transformed data elements, wherein N and M are greater than one;

generating a modulated signal in accordance with the transformed data elements of the transformed data matrix; and

transmitting, from at least one antenna of a wireless device, the modulated signal using a carrier signal;

wherein the data frame comprises a time-frequency plane of information, the data frame including a pilot element at a position within the time-frequency plane of information associated with the wireless device wherein other positions within the time-frequency plane are associated with other wireless devices.

4. A method, comprising:

receiving signal information corresponding to M time-frequency planes of information collected by M receive antenna instances, the M time-frequency planes of information including N pilot signals where each of the N pilot signals are associated with a different time-frequency plane location;

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 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of M transformed data elements, wherein N and M are greater than one;

generating a modulated signal in accordance with the transformed data elements of the transformed data matrix; and

transmitting, from at least one antenna of a wireless device, the modulated signal using a carrier signal.

5. A 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 wherein the transformed data frame has a first dimension of N transformed data elements and a second dimension of M transformed data elements, wherein N and M are greater than one, and wherein the transforming includes transforming each of the plurality of data elements with respect to both time and frequency;

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

transmitting, from at least one antenna of a wireless device, the modulated signal using a carrier signal.

6. The method of claim 5 wherein each of the plurality of transformed data elements includes a weighted contribution corresponding to each of the plurality of data elements.

7. The method of claim 5 where N is equal to M.

8. A 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 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of M transformed data elements, wherein N and M are greater than one;

generating a modulated signal in accordance with the transformed data elements of the transformed data matrix; and

transmitting, from at least one antenna of a wireless device, the modulated signal using a carrier signal;

wherein the data frame comprises a time-frequency plane of information, the data frame including a pilot element at a position within the time-frequency plane of information associated with the wireless device wherein other positions within the time-frequency plane are associated with other wireless devices.

9. A method, comprising:

receiving signal information corresponding to M time-frequency planes of information collected by M receive antenna instances, the M time-frequency planes of information including N pilot signals where each of the N pilot signals are associated with a different time-frequency plane location;

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 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of M transformed data elements, wherein N and M are greater than one;

generating a modulated signal in accordance with the transformed data elements of the transformed data matrix; and

transmitting, from at least one antenna of a wireless device, the modulated signal using a carrier signal.

10. A wireless device, comprising:

an antenna;

a transmitter coupled to the antenna, the transmitter including;

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 wherein the data frame has a first dimension of N data elements and a second dimension of M data elements, wherein N and M are greater than one, and wherein the program code includes code for transforming ones of the plurality of data elements with respect to both time and frequency; 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.

11. The wireless device of claim 10 wherein each of the plurality of transformed data elements includes a weighted contribution corresponding to each of the plurality of data elements.

12. The wireless device of claim 10 wherein the program code includes code for transforming each of the plurality of data elements with respect to both time and frequency.

13. The wireless device of claim 10 where N is equal to M.

14. A 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 wherein the transformed data matrix has a first dimension of N transformed data elements and a second dimension of M transformed data elements, wherein N and M are greater than one, and wherein the data frame comprises a time-frequency plane of information, the data frame including a pilot element at a position within the time-frequency plane of information associated with the wireless device wherein other positions within the time-frequency plane are associated with other wireless devices;

generating a modulated signal in accordance with the transformed data elements of the transformed data matrix; and

transmitting, from at least one antenna of a wireless device, the modulated signal using a carrier signal.