Soft combining based on automorphisms of polar codes
AssigneeQUALCOMM Incorporated
InventorsKirill Ivanov, Wei Yang, Jing Jiang
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Abstract
Certain aspects of the present disclosure provide techniques for soft combining of polar encoded transmissions. An example method, performed at a network node, generally includes obtaining multiple codeword permutations corresponding to different payloads, wherein the different payloads comprise first payload portions that are the same and second payload portions that differ in a deterministic manner, and each codeword permutation corresponds to one of the second payload portions, processing the multiple codeword permutations to obtain the second payload portions, obtaining the first payload portions after obtaining the second payload portions, and soft combining the first payload portions.
Claims21
An apparatus for wireless communication, comprising:
- at least one memory comprising computer-executable instructions;
- and
- one or more processors configured to execute the computer-executable instructions and cause the apparatus to:
- encode different payloads, using polar codes, to generate multiple codeword permutations, wherein each of the different payloads comprises a first payload portion that is the same for the different payloads and a second payload portion that differs among the different payloads in a deterministic manner, and each codeword permutation corresponds to one of the second payload portions,
- wherein the second payload portions correspond to counter values that change in a deterministic manner in different payloads,
- wherein, in order to output the multiple codeword permutations sequentially, the one or more processors are further configured to output a first codeword permutation corresponding to a first counter value and, subsequently, output a second codeword permutation corresponding to a second counter value, and
- wherein the second codeword permutation is generated by applying a permutation matrix to the first codeword permutation;
- and
- output the multiple codeword permutations sequentially.
An apparatus for wireless communication, comprising:
- at least one memory comprising computer-executable instructions;
- and
- one or more processors configured to execute the computer-executable instructions and cause the apparatus to:
- obtain multiple codeword permutations corresponding to different payloads, wherein the different payloads comprise first payload portions that are the same and second payload portions that differ in a deterministic manner, and each codeword permutation corresponds to one of the second payload portions, wherein:
- the different payloads correspond to physical broadcast channel (PBCH) transmissions, and
- the second payload portions correspond to system frame number (SFN) values conveyed in the PBCH transmissions;
- process the multiple codeword permutations to obtain the second payload portions;
- obtain the first payload portions after obtaining the second payload portions;
- and
- soft combine the first payload portions.
A method for wireless communication at a network node, comprising:
- obtaining multiple codeword permutations corresponding to different payloads, wherein the different payloads comprise first payload portions that are the same and second payload portions that differ in a deterministic manner, and each codeword permutation corresponds to one of the second payload portions, wherein:
- the different payloads correspond to physical broadcast channel (PBCH) transmissions, and
- the second payload portions correspond to system frame number (SFN) values conveyed in the PBCH transmissions;
- processing the multiple codeword permutations to obtain the second payload portions;
- obtaining the first payload portions after obtaining the second payload portions;
- and
- soft combining the first payload portions.
Dependencies are inferred from the claim text.