Symbol mapping for binary coding
View Patent ↗The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.
1. A communication device comprising:
a processor configured to:
map a symbol label to a constellation point of a cross-shaped constellation to generate a symbol for transmission via a communication channel, wherein the cross-shaped constellation includes a plurality of constellation points and a set of null points arranged in a square-shape or a rectangle-shape around an origin of a first axis and a second axis, wherein the set of null points includes corners of the square-shape or the rectangle-shape and correspond to locations not including constellation points.
2. The communication device of claim 1 , wherein the processor is further configured to:
encode at least one information bit to generate at least one encoded bit; and
generate the symbol label based on the at least one encoded bit.
3. The communication device of claim 1 , wherein the processor is further configured to:
transmit the symbol to at least one other communication device via at least one communication channel that includes the communication channel.
4. The communication device of claim 1 , wherein the cross-shaped constellation is based on a rectangle-shaped constellation having another plurality of constellation points that includes subsets of the another plurality of constellation points along at least one of a left hand side or a right hand side of the rectangle-shaped constellation, wherein a first subset of the subsets of the another plurality of constellation points is relocated to a top of the cross-shaped constellation and a second subset of the subsets of the another plurality of constellation points is relocated to a bottom of the cross-shaped constellation.
5. The communication device of claim 1 , wherein the symbol label includes an odd number of encoded bits, N, wherein N is an odd-valued integer, and wherein the plurality of constellation points includes 2 N constellation points.
6. The communication device of claim 1 , wherein the plurality of constellation points and the set of null points have a mirroring pattern from quadrant to quadrant along at least one of the first axis or the second axis.
7. The communication device of claim 1 , wherein:
a first plurality of null points of the set of null points is arranged in another square-shape and is located in a first corner of the square-shape or the rectangle-shape;
a second plurality of null points of the set of null points is arranged in the another square-shape and is located in a second corner of the square-shape or the rectangle-shape;
a third plurality of null points of the set of null points is arranged in the another square-shape and is located in a third corner of the square-shape or the rectangle-shape; and
a fourth plurality of null points of the set of null points is arranged in the another square-shape and is located in a fourth corner of the square-shape or the rectangle-shape.
8. The communication device of claim 1 , wherein the processor is further configured to:
support communications within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system.
9. A communication device comprising:
a processor configured to:
encode at least one information bit to generate at least one encoded bit;
generate a symbol label based on the at least one encoded bit;
map the symbol label to a constellation point of a cross-shaped constellation to generate a symbol, wherein the cross-shaped constellation includes a plurality of constellation points and a set of null points arranged in a square-shape or a rectangle-shape around an origin of a first axis and a second axis, wherein the set of null points includes corners of the square-shape or the rectangle-shape and correspond to locations not including constellation points; and
transmit the symbol to at least one other communication device via at least one communication channel.
10. The communication device of claim 9 , wherein the cross-shaped constellation is based on a rectangle-shaped constellation having another plurality of constellation points that includes subsets of the another plurality of constellation points along at least one of a left hand side or a right hand side of the rectangle-shaped constellation, wherein a first subset of the subsets of the another plurality of constellation points is relocated to a top of the cross-shaped constellation and a second subset of the subsets of the another plurality of constellation points is relocated to a bottom of the cross-shaped constellation.
11. The communication device of claim 9 , wherein:
the symbol label includes an odd number of encoded bits, N, wherein N is an odd-valued integer, and wherein the plurality of constellation points includes 2 N constellation points; and
the plurality of constellation points and the set of null points have a mirroring pattern from quadrant to quadrant along at least one of the first axis or the second axis.
12. The communication device of claim 9 , wherein:
a first plurality of null points of the set of null points is arranged in another square-shape and is located in a first corner of the square-shape or the rectangle-shape;
a second plurality of null points of the set of null points is arranged in the another square-shape and is located in a second corner of the square-shape or the rectangle-shape;
a third plurality of null points of the set of null points is arranged in the another square-shape and is located in a third corner of the square-shape or the rectangle-shape; and
a fourth plurality of null points of the set of null points is arranged in the another square-shape and is located in a fourth corner of the square-shape or the rectangle-shape.
13. The communication device of claim 9 , wherein the processor is further configured to:
support communications within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system.
14. A method for execution by a communication device, the method comprising:
mapping a symbol label to a constellation point of a cross-shaped constellation to generate a symbol, wherein the cross-shaped constellation includes a plurality of constellation points and a set of null points arranged in a square-shape or a rectangle-shape around an origin of a first axis and a second axis, wherein the set of null points includes corners of the square-shape or the rectangle-shape and correspond to locations not including constellation points; and
transmitting, via a communication interface of the communication device, the symbol to at least one other communication device via at least one communication channel.
15. The method of claim 14 further comprising:
encoding at least one information bit to generate at least one encoded bit; and
generating the symbol label based on the at least one encoded bit.
16. The method of claim 14 , wherein the cross-shaped constellation is based on a rectangle-shaped constellation having another plurality of constellation points that includes subsets of the another plurality of constellation points along at least one of a left hand side or a right hand side of the rectangle-shaped constellation, wherein a first subset of the subsets of the another plurality of constellation points is relocated to a top of the cross-shaped constellation and a second subset of the subsets of the another plurality of constellation points is relocated to a bottom of the cross-shaped constellation.
17. The method of claim 14 , wherein the symbol label includes an odd number of encoded bits, N, wherein N is an odd-valued integer, and wherein the plurality of constellation points includes 2 N constellation points.
18. The method of claim 14 , wherein the plurality of constellation points and the set of null points have a mirroring pattern from quadrant to quadrant along at least one of the first axis or the second axis.
19. The method of claim 14 , wherein:
a first plurality of null points of the set of null points is arranged in another square-shape and is located in a first corner of the square-shape or the rectangle-shape;
a second plurality of null points of the set of null points is arranged in the another square-shape and is located in a second corner of the square-shape or the rectangle-shape;
a third plurality of null points of the set of null points is arranged in the another square-shape and is located in a third corner of the square-shape or the rectangle-shape; and
a fourth plurality of null points of the set of null points is arranged in the another square-shape and is located in a fourth corner of the square-shape or the rectangle-shape.
20. The method of claim 14 further comprising:
operating the communication interface of the communication device to support communications within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system.