Techniques and apparatuses for odd-exponent quadrature amplitude modulation

Patent metadata

Field	Value
Publication number	US-10116484-B1
Application number	US-201715656580-A
Country	US
Kind code	B1
Filing date	Jul 21, 2017
Priority date	Jul 21, 2017
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may identify groups of bits of a particular size; map the groups of bits, with corresponding parity bits, to an even-exponent modulation constellation to generate an odd-exponent modulation constellation, wherein at least one corresponding parity bit, of the corresponding parity bits, is added to a group of bits, of the groups of bits, for the mapping; and transmit a signal based at least in part on the odd-exponent modulation constellation. Numerous other aspects are provided.

First claim

What is claimed is:

1. A method of wireless communication performed by a wireless communication device, comprising:
identifying groups of bits of a particular size;
mapping the groups of bits, with corresponding parity bits, to an even-exponent modulation constellation to generate an odd-exponent modulation constellation,
wherein at least one corresponding parity bit, of the corresponding parity bits, is added to a group of bits, of the groups of bits, for the mapping; and

transmitting a signal based at least in part on the odd-exponent modulation constellation.

2. The method of claim 1 ,
wherein the particular size is 2n−1 bits and the corresponding parity bits are associated with the groups of bits as a 2nth bit, and
wherein n is greater than 0.

3. The method of claim 2 , wherein the odd-exponent modulation constellation has a 2n-lth order.

4. The method of claim 1 , wherein a subset of constellation points of the even-exponent modulation constellation is skipped in the odd-exponent modulation constellation based at least in part on the corresponding parity bits.

5. The method of claim 1 , wherein every other constellation point of the even-exponent modulation constellation is skipped in the odd-exponent modulation constellation based at least in part on the corresponding parity bits.

6. The method of claim 1 , wherein the odd-exponent modulation constellation is associated with a larger minimum distance between constellation points than the even-exponent modulation constellation based at least in part on the groups of bits being mapped with the corresponding parity bits.

7. The method of claim 6 ,
wherein the corresponding parity bits include one parity bit per group of bits of the groups of bits;
wherein a minimum distance between constellation points of the even-exponent modulation constellation is equal to x;
wherein a minimum distance between constellation points of the odd-exponent modulation constellation is equal to x multiplied by a square root of 2; and
wherein x is equal to or greater than 0.

8. The method of claim 1 , wherein the odd-exponent modulation constellation retains a symmetric property of the even-exponent modulation constellation.

9. The method of claim 8 , wherein the symmetric property corresponds to an axis of symmetry at a 45 degree angle or a 135 degree angle with regard to an in-phase axis of the odd-exponent modulation constellation.

10. The method of claim 1 , wherein the odd-exponent modulation constellation has a constellation power-normalization factor equal to a constellation power-normalization factor of the even-exponent modulation constellation.

11. A wireless communication device, comprising:
a memory; and
at least one processor operatively coupled to the memory, the at least one processor configured to:
identify groups of bits of a particular size;
map the groups of bits, with corresponding parity bits, to an even-exponent modulation constellation to generate an odd-exponent modulation constellation,
wherein at least one corresponding parity bit, of the corresponding parity bits, is added to a group of bits, of the groups of bits, for the mapping; and

transmit a signal based at least in part on the odd-exponent modulation constellation.

12. The wireless communication device of claim 11 ,
wherein the particular size is 2n−1 bits and the corresponding parity bits are associated with the groups of bits as a 2nth bit, and
wherein n is greater than 0.

13. The wireless communication device of claim 12 , wherein the odd-exponent modulation constellation has a 2n-lth order.

14. The wireless communication device of claim 11 , wherein a subset of constellation points of the even-exponent modulation constellation is skipped in the odd-exponent modulation constellation based at least in part on the corresponding parity bits.

15. The wireless communication device of claim 11 , wherein every other constellation point of the even-exponent modulation constellation is skipped in the odd-exponent modulation constellation based at least in part on the corresponding parity bits.

16. The wireless communication device of claim 11 , wherein the odd-exponent modulation constellation is associated with a larger minimum distance between constellation points than the even-exponent modulation constellation based at least in part on the groups of bits being mapped with the corresponding parity bits.

17. The wireless communication device of claim 16 , wherein the corresponding parity bits include one parity bit per group of bits of the groups of bits;
wherein a minimum distance between constellation points of the even-exponent modulation constellation is equal to x;
wherein a minimum distance between constellation points of the odd-exponent modulation constellation is equal to x multiplied by a square root of 2; and
wherein x is equal to or greater than 0.

18. The wireless communication device of claim 11 , wherein the odd-exponent modulation constellation retains a symmetric property of the even-exponent modulation constellation.

19. A non-transitory computer-readable medium storing computer executable code for wireless communication, comprising code for:
identifying groups of bits of a particular size;
mapping the groups of bits, with corresponding parity bits, to an even-exponent modulation constellation to generate an odd-exponent modulation constellation,
wherein at least one corresponding parity bit, of the corresponding parity bits, is added to a group of bits, of the groups of bits, for the mapping; and
transmitting a signal based at least in part on the odd-exponent modulation constellation.

20. The non-transitory computer-readable medium of claim 19 ,
wherein the particular size is 2n−1 bits and the corresponding parity bits are associated with the groups of bits as a 2nth bit, and
wherein n is greater than 0.

21. The non-transitory computer-readable medium of claim 20 , wherein the odd-exponent modulation constellation has a 2n-lth order.

22. The non-transitory computer-readable medium of claim 19 , wherein a subset of constellation points of the even-exponent modulation constellation is skipped in the odd-exponent modulation constellation based at least in part on the corresponding parity bits.

23. The non-transitory computer-readable medium of claim 19 , wherein the odd-exponent modulation constellation is associated with a larger minimum distance between constellation points than the even-exponent modulation constellation based at least in part on the groups of bits being mapped with the corresponding parity bits.

24. The non-transitory computer-readable medium of claim 19 , wherein the odd-exponent modulation constellation retains a symmetric property of the even-exponent modulation constellation.

25. An apparatus, comprising:
means for identifying groups of bits of a particular size;
means for mapping the groups of bits, with corresponding parity bits, to an even-exponent modulation constellation to generate an odd-exponent modulation constellation,
wherein at least one corresponding parity bit, of the corresponding parity bits, is added to a group of bits, of the groups of bits, for the mapping; and
means for transmitting a signal based at least in part on the odd-exponent modulation constellation.

26. The apparatus of claim 25 ,
wherein the particular size is 2n−1 bits and the corresponding parity bits are associated wi

Assignees

• Qualcomm Inc

Inventors

• Chakraborty Tuhin Subhra
• Gore Ashutosh Deepak

Classifications

• H04L27/3488

  Multiresolution systems · CPC title

• H04L27/3483 Primary

  using a modulation of the constellation points · CPC title

• H04L27/3416

  in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes · CPC title

• H04L27/36

  Modulator circuits; Transmitter circuits · CPC title

• H04L1/0058 Primary

  Block-coded modulation · CPC title