US 2026/0172082 A1 · GROUPING LOG-LIKELIHOOD-RATIOS FROM DIFFERENT MULTIPLE-INPUT-MULTIPLE-OUTPUT LAYERS FOR POLAR DECODING

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter may generate multiple encoded bits using a polar encoder. The transmitter may separate the multiple encoded bits into N layers for a multiple-input-multiple-output (MIMO) transmission. The transmitter may select V layer pairs from the N layers, each layer pair of the V layer pairs including a respective first layer and a respective second layer from the N layers. The transmitter may group, for each layer pair of the V layer pairs, a first M symbol bits of the respective first layer and a second M symbol bits of the respective second layer to generate multiple bit pairs. Each bit pair includes a respective first bit of the first M symbol bits and a respective second bit of the second M symbol bits. Numerous other aspects are described.

Claims30

Dependent claims

An apparatus for wireless communication at a transmitter, comprising:

one or more memories;
and
one or more processors, coupled to the one or more memories, configured to cause the transmitter to:
generate multiple encoded bits of a data stream using a polar encoder;
separate the multiple encoded bits into N layers for a multiple-input-multiple-output (MIMO) transmission, N being a first integer that is even and greater than zero, the separating being based at least in part on a symbol length of M bits per symbol, M being a second integer;
select V layer pairs from the N layers, each layer pair of the V layer pairs including a respective first layer and a respective second layer from the N layers, V being a third integer;
group, for each layer pair of the V layer pairs, a first M symbol bits of the respective first layer of the layer pair and a second M symbol bits of the respective second layer of the layer pair to generate a MIMO input bit sequence that includes multiple bit pairs, and each bit pair of the multiple bit pairs includes a respective first bit of the first M symbol bits of the respective first layer and a respective second bit of the second M symbol bits of the respective second layer;
and
transmit the MIMO transmission using the MIMO input bit sequence.

6 more elements

An apparatus for wireless communication at a receiver, comprising:

one or more memories;
and
one or more processors, coupled to the one or more memories, configured to cause the receiver to:
receive a multiple-input-multiple-output (MIMO) transmission that includes N MIMO layers, N being a first integer that is even and greater than zero;
demodulate the MIMO transmission to generate a MIMO output log-likelihood-ratio (LLR) sequence that includes N sub-LLR sequences, each sub-LLR sequence of the N sub-LLR sequences being associated with a respective MIMO layer of the MIMO transmission, the MIMO output LLR sequence being based at least in part on a symbol length of M bits per symbol, M being a second integer;
reorder, as at least part of an inverse mapping operation, the MIMO output LLR sequence to generate a decoder input LLR sequence, the reordering being based at least in part on:
the N sub-LLR sequences being partitioned into V sub-LLR sequence pairs, V being a third integer,
each sub-LLR sequence pair of the V sub-LLR sequence pairs including a respective first sub-LLR sequence of the N sub-LLR sequences and a respective second sub-LLR sequence of the N sub-LLR sequences, the respective first sub-LLR sequence being associated with a respective first MIMO layer of the N MIMO layers, the respective second sub-LLR sequence being associated with a respective second MIMO layer of the N MIMO layers, and
the decoder input LLR sequence including multiple LLR pairs, each LLR pair of the multiple LLR pairs being associated with a sub-LLR sequence pair of the V sub-LLR sequence pairs, each LLR pair of the multiple LLR pairs being based at least in part on first M LLRs in the respective first sub-LLR sequence of the sub-LLR sequence pair that are associated with a respective first symbol and second M LLRs in the respective second sub-LLR sequence of the sub-LLR sequence pair that are associated with a respective second symbol, each LLR pair including a first respective LLR of the first M LLRs and a second respective LLR of the second M LLRs;
and
generate a decoded bit sequence from a polar decoder by inputting the decoder input LLR sequence to the polar decoder.

8 more elements

A method of wireless communication performed by a transmitter, comprising:

generating multiple encoded bits of a data stream using a polar encoder;
separating the multiple encoded bits into N layers for a multiple-input-multiple-output (MIMO) transmission, N being a first integer that is even and greater than zero, the separating being based at least in part on a symbol length of M bits per symbol, M being a second integer;
selecting V layer pairs from the N layers, each layer pair of the V layer pairs including a respective first layer and a respective second layer from the N layers, V being a third integer;
grouping, for each layer pair of the V layer pairs, a first M symbol bits of the respective first layer of the layer pair and a second M symbol bits of the respective second layer of the layer pair to generate a MIMO input bit sequence that includes multiple bit pairs, and each bit pair of the multiple bit pairs includes a respective first bit of the first M symbol bits of the respective first layer and a respective second bit of the second M symbol bits of the respective second layer;
and
transmitting the MIMO transmission using the MIMO input bit sequence.

3 more elements

A method of wireless communication performed by a receiver, comprising:

receiving a multiple-input-multiple-output (MIMO) transmission that includes N MIMO layers, N being a first integer that is even and greater than zero;
demodulating the MIMO transmission to generate a MIMO output log-likelihood-ratio (LLR) sequence that includes N sub-LLR sequences, each sub-LLR sequence of the N sub-LLR sequences being associated with a respective MIMO layer of the MIMO transmission, the MIMO output LLR sequence being based at least in part on a symbol length of M bits per symbol, M being a second integer;
reordering, as at least part of an inverse mapping operation, the MIMO output LLR sequence to generate a decoder input LLR sequence, the reordering being based at least in part on:
the N sub-LLR sequences being partitioned into V sub-LLR sequence pairs, V being a third integer,
each sub-LLR sequence pair of the V sub-LLR sequence pairs including a respective first sub-LLR sequence of the N sub-LLR sequences and a respective second sub-LLR sequence of the N sub-LLR sequences, the respective first sub-LLR sequence being associated with a respective first MIMO layer of the N MIMO layers, the respective second sub-LLR sequence being associated with a respective second MIMO layer of the N MIMO layers, and
the decoder input LLR sequence including multiple LLR pairs, each LLR pair of the multiple LLR pairs being associated with a sub-LLR sequence pair of the V sub-LLR sequence pairs, each LLR pair of the multiple LLR pairs being based at least in part on first M LLRs in the respective first sub-LLR sequence of the sub-LLR sequence pair that are associated with a respective first symbol and second M LLRs in the respective second sub-LLR sequence of the sub-LLR sequence pair that are associated with a respective second symbol, each LLR pair including a first respective LLR of the first M LLRs and a second respective LLR of the second M LLRs;
and
generating a decoded bit sequence from a polar decoder by inputting the decoder input LLR sequence to the polar decoder.

5 more elements

Dependencies are inferred from the claim text.

Grouping log-likelihood-ratios from different multiple-input-multiple-output layers for polar decoding

Life of this patent

Grouping log-likelihood-ratios from different multiple-input-multiple-output layers for polar decoding

Life of this patent

Abstract

Claims30