Low complexity scma/lds detection systems and methods
AssigneeHuawei Technologies Co., Ltd.
InventorsAlireza Bayesteh, Hosein Nikopour, Mohammadhadi Baligh, Mahmoud Taherzadehboroujeni
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Abstract
Systems and methods of low complexity SCMA/LDS detection are disclosed by performing a detection algorithm such as a Message Passing Algorithm (MPA) in a receiver only over selective sub-graphs of a corresponding full factor graph representative of multiplexed codes for the multiple access code system.
Claims50
In a receiver, a method of low complexity multiple access code detection comprising:
- receiving a signal over an antenna, the signal containing data multiplexed over a set of subcarriers according to a multiple access code system;
- and
- decoding, by a processor, the signal in accordance with a clustered message passing algorithm (MPA), wherein the clustered MPA corresponds to one or more sub-graphs, each of the one or more sub-graphs including fewer variable node to function node (VN-to-FN) branches for at least one function node than an underlying factor graph representative of multiplexed codes for the multiple access code system.
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An apparatus comprising:
- a receiver configured to receive a signal over an antenna, the signal containing data multiplexed over a set of subcarriers according to a multiple access code system;
- and
- a processor configured to decode the signal in accordance with a clustered message passing algorithm (MPA), wherein the clustered MPA corresponds to one or more sub-graphs, each of the one or more sub-graphs including fewer variable node to function node (VN-to-FN) branches for at least one function node than an underlying factor graph representative of the multiple access code system.
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A computer program product comprising a non-transitory computer readable storage medium storing programming, the programming including instructions to:
- receive a signal over an antenna, the signal containing data multiplexed over a set of subcarriers according to a multiple access code system;
- and
- decode the signal in accordance with a clustered message passing algorithm (MPA), wherein the clustered MPA corresponds to one or more sub-graphs, each of the one or more sub-graphs including fewer variable node to function node (VN-to-FN) branches for at least one function node than an underlying factor graph representative of the multiple access code system.
Dependencies are inferred from the claim text.