US 2025/0030502 A1Published application

Optimized code-split symbol constellations

AssigneeHughes Network Systems, LLC

InventorsMustafa Eroz, Lin-Nan Lee

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Abstract

Various arrangements for improving performance of code split communications are presented herein. A second portion of a first codeword and a third portion of a second codeword can be transmitted using symbols such that each transmitted symbol includes bits from the second portion of the first codeword and bits from the third portion of the second codeword. At a receiver, decoder inputs can be generated for the third portion of the second codeword based on an optimized constellation and the second portion of the first codeword. The second portion of the first codeword is used to identify a label group of the optimized constellation and eliminate all other label groups of the plurality of label groups. Within each label group, symbol labels are Gray labeled. However, at least a first symbol label is not Gray labeled with an adjacent second symbol label of a different label group.

Claims20

Dependent claims

A method for improving performance of code split communications, the method comprising:

splitting, by a transmission system, a first codeword into a first portion and a second portion;
splitting, by the transmission system, a second codeword into a third portion and a fourth portion;
transmitting, by the transmission system, the second portion of the first codeword and the third portion of the second codeword together as a plurality of symbols such that each transmitted symbol of the plurality of symbols comprises a first number of bits from the second portion of the first codeword and a second number of bits from the third portion of the second codeword;
decoding, by a receiver system, the first codeword such that the first portion and the second portion of the first codeword are determined to be properly decoded;
and
generating, by the receiver system, decoder inputs for the third portion of the second codeword using an optimized constellation and the second portion of the first codeword, wherein:
the second portion of the first codeword is used to identify a label group of a plurality of label groups of the optimized constellation and eliminate all other label groups of the plurality of label groups;
within each label group of the plurality of label groups, symbol labels are Gray labeled;
and
at least a first symbol label is not Gray labeled with an adjacent second symbol label, the first symbol label and the adjacent second symbol label being members of different label groups of the plurality of label groups.

7 more elements

A system for improving performance of code split communications, the system comprising:

a satellite gateway system configured to:
split a first codeword into a first portion and a second portion;
split a second codeword into a third portion and a fourth portion;
and
transmit the second portion of the first codeword and the third portion of the second codeword together as a plurality of symbols such that each transmitted symbol of the plurality of symbols comprises a first number of bits from the second portion of the first codeword and a second number of bits from the third portion of the second codeword;
and
a receiver system, configured to:
receive the first codeword and the second codeword via a satellite antenna;
decode the first codeword such that the first portion and the second portion of the first codeword are determined to be properly decoded;
and
generate decoder inputs for the third portion of the second codeword using an optimized constellation and the second portion of the first codeword, wherein:
the second portion of the first codeword is used to identify a label group of a plurality of label groups of the optimized constellation and eliminate all other label groups of the plurality of label groups;
within each label group of the plurality of label groups, symbol labels are Gray labeled;
and
at least a first symbol label is not Gray labeled with an adjacent second symbol label, the first symbol label and the second symbol label being members of different label groups of the plurality of label groups.

12 more elements

Dependencies are inferred from the claim text.