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1. (WO2018129305) MUTUAL-INFORMATION BASED RECURSIVE POLAR CODE CONSTRUCTION
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS

What is claimed is:

1. A method for wireless communication, comprising:

receiving an encoded codeword over a wireless channel via a wireless communication interface configured to receive wireless data signals;

identifying a set of repeated bit locations in the received codeword;

identifying a set of bit locations of a polar code used for information bits for the encoding,

wherein the set of bit locations is identified based at least in part on recursively partitioning bit-channels of the polar code for each stage of polarization and assigning portions of a number of the information bits to bit-channel partitions of each stage of polarization based at least in part on a mutual information transfer function of respective aggregate capacities of the bit-channel partitions,

wherein a target mutual information for a first polarization stage is determined as a function of the number of the information bits and a number of bit locations in the received codeword,

wherein zero information bits are assigned to a first bit-channel partition of the first polarization stage, the first bit-channel partition corresponding to the set of repeated bit locations; and

decoding the received codeword according to the polar code to obtain an information bit vector at the set of bit locations.

2. The method of claim 1, further comprising:

determining that the target mutual information is greater than the number of the information bits divided by the number of bit locations in the received codeword.

3. The method of claim 1, further comprising:

determining, for the each stage of polarization, a capacity of each bit-channel of each of the bit-channel partitions, based at least in part on bit-channel capacities of input bit-channels from the previous stage of polarization and the mutual information transfer function.

4. The method of claim 1, wherein the set of repeated bit locations correspond to at least one of a most significant bit portion of the received codeword, a least significant bit portion of the received codeword, an intermediate portion of the received codeword between a most significant bit and a least significant bit, or a combination thereof.

5. The method of claim 1, wherein the mutual information transfer function is based at least in part on a binary erasure channel (BEC) function and a correction term.

6. The method of claim 1, wherein the target mutual information is associated with at least one reliability metric.

7. The method of claim 1, wherein the at least one reliability metric is associated with a capacity of at least one of the bit-channels to successfully convey at least some of the information bits.

8. The method of claim 1, further comprising associating at least one of the bit-channel partitions with a first group, and associating at least one other of the bit-channel partitions with a second group.

9. The method of 8, wherein the first group comprises a lower reliability group, and the second group comprises a higher reliability group.

10. The method of claim 1, wherein at least some of the repeated bit locations are at least in part indicative that other bit locations of the codeword are blank.

11. The method of claim 1, wherein the recursively partitioning bit-channels of the polar code for each stage of polarization occurs prior to the assigning.

12. The method of claim 11, wherein the recursively partitioning the bit-channels is based at least in part on allocating a threshold number of bit locations to more than one of the bit-channels.

13. The method of claim 1, wherein the target mutual information is based at least in part on the mutual information transfer function.

14. A method for wireless communication, comprising:

receiving an encoded codeword over a wireless channel via a wireless communication interface configured to receive wireless data signals;

identifying a set of bit locations of a polar code used for information bits for the encoding,

wherein the set of bit locations is identified based at least in part on

recursively partitioning bit-channels of the polar code for each stage of polarization and assigning portions of a number of the information bits to bit-channel partitions of each stage of polarization based at least in part on a mutual information transfer function of respective aggregate capacities of the bit-channel partitions,

wherein the mutual information transfer function is based at least in part on a binary erasure channel (BEC) function and a correction term, and

wherein zero information bits are assigned to a first bit-channel partition of the first polarization stage, the first bit-channel partition corresponding to the set of repeated bit locations; and

processing the received codeword according to the polar code to obtain an information bit vector at the set of bit locations.

15. The method of claim 14, wherein the correction term is based at least in part on a function of a bit-channel capacity of the each stage of polarization and a capacity imbalance factor.

16. The method of claim 15, wherein the correction term comprises at least one of: an offset factor applied to the bit-channel capacity, a scaling factor applied to the offset bit-channel capacity, or an offset applied to the scaled and offset bit-channel capacity.

17. The method of claim 14, wherein the mutual information transfer function is based at least in part on at least one reliability metric.

18. The method of claim 14, further comprising associating at least one of the bit-channel partitions with a lower reliability group, and associating at least one other of the bit-channel partitions with a higher reliability group.

19. An apparatus for wireless communication, comprising: means for receiving an encoded codeword over a wireless channel via a wireless communication interface configured to receive wireless data signals;

means for identifying a set of repeated bit locations in the received codeword; means for identifying a set of bit locations of a polar code used for information bits for the encoding,

wherein the set of bit locations is identified based at least in part on recursively partitioning bit-channels of the polar code for each stage of polarization and assigning portions of a number of the information bits to bit-channel partitions of each stage of polarization based at least in part on a mutual information transfer function of respective aggregate capacities of the bit-channel partitions,

wherein a target mutual information for a first polarization stage is determined as a function of the number of the information bits and a number of bit locations in the received codeword, and

wherein zero information bits are assigned to a first bit-channel partition of the first polarization stage, the first bit-channel partition corresponding to the set of repeated bit locations; and

means for decoding the received codeword according to the polar code to obtain an information bit vector at the set of bit locations.

20. The apparatus of claim 19, further comprising means for determining that the target mutual information is greater than the number of the information bits divided by the number of bit locations in the received codeword.

21. The apparatus of claim 19, further comprising means for determining, for the each stage of polarization, a capacity of each bit-channel of each of the bit-channel partitions, based at least in part on bit-channel capacities of input bit-channels from the previous stage of polarization and the mutual information transfer function.

22. The apparatus of claim 19, wherein the set of repeated bit locations correspond to at least one of a most significant bit portion of the received codeword, a least significant bit portion of the received codeword, an intermediate portion of the received codeword between a most significant bit and a least significant bit, or a combination thereof.

23. The apparatus of claim 19, wherein the mutual information transfer function is based at least in part on a binary erasure channel (BEC) function and a correction term.

24. The apparatus of claim 19, wherein the target mutual information is associated with at least one reliability metric.

25. The apparatus of claim 19, further comprising means for associating at least one of the bit-channel partitions with a lower reliability group, and associating at least one other of the bit-channel partitions with a higher reliability group.

26. An apparatus for wireless communication, comprising: means for receiving an encoded codeword over a wireless channel via a wireless communication interface configured to receive wireless data signals;

means for identifying a set of bit locations of a polar code used for information bits for the encoding,

wherein the set of bit locations is determined based at least in part on recursively partitioning bit-channels of the polar code for each stage of polarization and assigning portions of a number of the information bits to bit-channel partitions of each stage of polarization based at least in part on a mutual information transfer function of respective aggregate capacities of the bit-channel partitions,

wherein the mutual information transfer function is based at least in part on a binary erasure channel (BEC) function and a correction term, and

wherein zero information bits are assigned to a first bit-channel partition of the first polarization stage, the first bit-channel partition corresponding to the set of repeated bit locations; and

means for processing the received codeword according to the polar code to obtain an information bit vector at the set of bit locations.

27. The apparatus of claim 26, wherein the correction term is based at least in part on a function of a bit-channel capacity of the each stage of polarization and a capacity imbalance factor.

28. The apparatus of claim 27, wherein the correction term comprises at least one of: an offset factor applied to the bit-channel capacity, a scaling factor applied to the offset bit-channel capacity, or an offset applied to the scaled and offset bit-channel capacity.

29. The apparatus of claim 26, wherein the mutual information transfer function is based at least in part on at least one reliability metric.

30. The apparatus of claim 26, further comprising means for associating at least one of the bit-channel partitions with a lower reliability group, and associating at least one other of the bit-channel partitions with a higher reliability group.