Granted Patent B1

US 11,522,740 · App. 17/878,238 · Granted Dec 6, 2022

Inventors: David E. Newman (Poway, CA); R. Kemp Massengill (Palos Verdes, CA)

Assignee: ULTRALOGIC 6G, LLC

H04L27/04H04L5/0051H04L27/06H04W72/044

Abstract

Claims (83)

1. A method for a wireless entity to transmit a message, the method comprising:

determining a modulation scheme comprising a plurality of amplitude levels;

modulating a resource element of the message according to a first amplitude level and a second amplitude level, wherein the resource element comprises a symbol-time in duration and a subcarrier in frequency, and wherein the symbol-time comprises a first portion and a second portion;

amplitude modulating the first portion of the symbol-time according to the first amplitude level, and amplitude modulating the second portion of the symbol-time according to the second amplitude level;

calculating a frequency shift according to a difference between the first and second amplitude levels;

adjusting a transmission frequency to compensate for the frequency shift; and

transmitting the message element at the adjusted transmission frequency.

2. The method of claim 1 , wherein the message is configured for transmission according to 5G or 6G technology.

3. The method of claim 1 , wherein the first amplitude level transitions to the second amplitude level in a time shorter than a cyclic prefix of the resource element.

4. The method of claim 1 , wherein the first amplitude level transitions to the second amplitude level in a linear ramp spanning the symbol-time.

5. A method for a wireless entity to transmit a message, the method comprising:

determining a modulation scheme comprising a plurality of amplitude levels;

modulating a resource element of the message according to a first amplitude level and a second amplitude level, wherein the resource element comprises a symbol-time in duration and a subcarrier in frequency, and wherein the symbol-time comprises a first portion and a second portion;

amplitude modulating the first portion of the symbol-time according to the first amplitude level, and amplitude modulating the second portion of the symbol-time according to the second amplitude level;

calculating, according to a difference between the first and second amplitude levels, an energy spill-over into a second subcarrier adjacent to the subcarrier of the resource element;

determining, according to the message, a signal to be transmitted in the second subcarrier;

adjusting the signal in the second subcarrier to compensate for the energy spill-over; and

transmitting, in the second subcarrier, the signal so adjusted.

6. The method of claim 5 , wherein the first and second amplitude levels are both positive or both negative.

7. The method of claim 5 , wherein one of the first and second amplitude levels is positive and the other amplitude level is negative.

8. The method of claim 5 , wherein the message is configured for transmission according to 5G or 6G technology.

9. The method of claim 5 , wherein the first amplitude level transitions to the second amplitude level in a time shorter than a cyclic prefix of the resource element.

10. The method of claim 5 , wherein the first amplitude level transitions to the second amplitude level in a linear ramp spanning the symbol-time.

11. A method for a wireless entity to transmit a message, the method comprising:

determining a modulation scheme comprising a plurality of amplitude levels;

modulating a resource element of the message according to a first amplitude level and a second amplitude level, wherein the resource element comprises a symbol-time in duration and a subcarrier in frequency, and wherein the symbol-time comprises a first portion and a second portion;

amplitude modulating the first portion of the symbol-time according to the first amplitude level, and amplitude modulating the second portion of the symbol-time according to the second amplitude level;

determining that the modulation scheme comprises an I-branch signal and a Q-branch signal orthogonal to the I-branch signal;

modulating the I-branch signal according to the first amplitude level in the first portion of the symbol-time of the resource element, and modulating the I-branch signal according to the second amplitude level in the second portion of the symbol-time of the resource element; and

modulating the Q-branch signal according to a third amplitude level in the first portion of the symbol-time of the resource element, and modulating the Q-branch signal according to a fourth amplitude level in the second portion of the symbol-time of the resource element.

12. The method of claim 11 , further comprising:

a) calculating, according to a difference between the first and second amplitude levels, an I-branch frequency shift, and adjusting a transmission frequency of the I-branch signal to compensate for the I-branch frequency shift;

b) calculating, according to a difference between the third and fourth amplitude levels, a Q-branch frequency shift, and adjusting a transmission frequency of the Q-branch signal to compensate for the Q-branch frequency shift; and

c) transmitting the resource element with the I-branch frequency so adjusted and the Q-branch frequency so adjusted.

13. A method for a wireless entity to transmit a message, the method comprising:

determining a modulation scheme comprising a plurality of amplitude levels;

modulating a resource element of the message according to a first amplitude level and a second amplitude level, wherein the resource element comprises a symbol-time in duration and a subcarrier in frequency, and wherein the symbol-time comprises a first portion and a second portion;

amplitude modulating the first portion of the symbol-time according to the first amplitude level, and amplitude modulating the second portion of the symbol-time according to the second amplitude level;

determining a maximum amplitude level and a minimum amplitude level of the modulation scheme;

transmitting, proximate to the message, a demodulation reference that occupies a particular symbol-time and five subcarriers, the five subcarriers comprising a first, second, third, fourth, and fifth subcarrier;

transmitting zero amplitude on the first, third, and fifth subcarriers;

transmitting, on the second subcarrier, the maximum amplitude level in a first portion of the particular symbol-time, and the minimum amplitude level in a second portion of the particular symbol-time; and

transmitting, on the fourth subcarrier, the minimum amplitude level in a first portion of the particular symbol-time, and the maximum amplitude level in a second portion of the particular symbol-time.

14. A wireless receiver configured to:

determine a plurality of amplitude levels comprising a modulation scheme;

receive a message modulated according to the modulation scheme;

determine that a particular message element of the message is modulated according to a first amplitude level and a second amplitude level of the modulation scheme, wherein a first portion of the message element is modulated according to the first amplitude level and a second portion of the message element is modulated according to the second amplitude level;

demodulate the message element according to the first and second amplitude levels;

calculate, according to the first and second amplitude levels, an energy spill-over into an adjacent subcarrier adjacent to the message element;

measure a measured signal in the adjacent subcarrier;

calculate an adjusted signal, the adjusted signal comprising the measured signal adjusted to compensate for the energy spill-over; and

demodulate the adjacent subcarrier according to the adjusted signal.

15. A wireless receiver configured to:

determine a plurality of amplitude levels comprising a modulation scheme;

receive a message modulated according to the modulation scheme;

determine that a particular message element of the message is modulated according to a first amplitude level and a second amplitude level of the modulation scheme, wherein a first portion of the message element is modulated according to the first amplitude level and a second portion of the message element is modulated according to the second amplitude level;

demodulate the message element according to the first and second amplitude levels;

upon receiving the particular message element and determining the first and second amplitude levels, calculate, according to the first and second amplitude levels, an energy spill-over into an adjacent subcarrier, the adjacent subcarrier being adjacent to the particular message element;

measure a measured signal in the adjacent subcarrier; and

subtract, from the measured signal, the calculated energy spill-over.

16. A wireless receiver configured to:

determine a plurality of amplitude levels comprising a modulation scheme;

receive a message modulated according to the modulation scheme;

determine that a particular message element of the message is modulated according to a first amplitude level and a second amplitude level of the modulation scheme, wherein a first portion of the message element is modulated according to the first amplitude level and a second portion of the message element is modulated according to the second amplitude level;

demodulate the message element according to the first and second amplitude levels;

receive a demodulation reference proximate to the message, the demodulation reference comprising a first demodulation resource element containing transmission energy, and a second demodulation resource element containing no transmission energy;

measure, during a first portion of the first demodulation resource element, a maximum amplitude level of the modulation scheme, and measure, during a second portion of the first demodulation resource element, a minimum amplitude level of the modulation scheme; and

measure, during the second demodulation resource element, an energy spill-over.

17. Non-transitory computer-readable media in a wireless transmitter, the media containing instructions that when implemented in a computing environment cause a method to be performed, the method comprising:

determining a modulation scheme comprising amplitude modulation, the amplitude modulation comprising a plurality of amplitude levels;

determining a message to be transmitted, the message comprising two or more message elements, each message element comprising a resource element of a resource grid, each resource element comprising a subcarrier in frequency and a symbol-time in time, each symbol-time comprising a first portion and a second portion;

modulating the first portion of a particular message element according to a first amplitude level of the plurality of amplitude levels, and modulating the second portion of the particular message element according to a second amplitude level of the plurality of amplitude levels;

determining a minimum amplitude level and a maximum amplitude level of the modulation scheme;

prepending, to the message, a first demodulation reference comprising a demodulation resource element modulated according to the maximum and minimum amplitude levels, wherein a first portion of a symbol-time of the demodulation resource element is modulated according to the maximum amplitude level, and a second portion of the symbol-time of the demodulation resource element is modulated according to the minimum amplitude level; and

appending, to the message, a second demodulation reference comprising a second resource element comprising a second symbol-time;

wherein a first portion of the second symbol-time is modulated according to the minimum amplitude level; and

wherein a second portion of the second symbol-time is modulated according to the maximum amplitude level.

18. The media of claim 17 , wherein:

a) the modulation of the particular message element includes a transition between the first amplitude level and the second amplitude level; and

b) a time of the transition is less than a cyclic prefix time associated with the message element.

19. The media of claim 17 , wherein:

a) the modulation of the particular message element includes a transition between the first amplitude level and the second amplitude level; and

b) the transition comprises a linear ramp spanning the symbol-time of the message element.

Assignments (3)

Continuity (11)