LOW COMPLEXITY SCMA/LDS DETECTION SYSTEMS AND METHODS
First Claim
Patent Images
1. 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.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
66 Claims
-
1. 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. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 49, 50, 51)
-
-
2. (canceled)
-
13-14. -14. (canceled)
-
16. 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. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 29, 30, 46, 47, 48)
-
-
17. (canceled)
-
27-28. -28. (canceled)
-
31-45. -45. (canceled)
-
52. 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. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
-
Specification