发明名称 |
Low Complexity Receiver and Method for Low Density Signature Modulation |
摘要 |
Method and apparatus embodiments are provided for low complexity message passing algorithm (MPA) detection with substantially minor or tolerated performance loss compared to the standard MPA. A method includes calculating, at a detector, a plurality of function nodes (FNs) according to a plurality of received multiplexing signals for a one or a plurality of user equipments (UEs) using a plurality of first MPA computations that map a plurality of variable nodes (VNs) corresponding to the UEs to the FNs and using a priori information in an initial vector of probabilities for each of the VNs, excluding from the first MPA computations a plurality of first relatively small multiplication terms, updating the probabilities for the VNs using the last calculated FNs and a plurality of second MPA computations that map the FNs to the VNs, and excluding a plurality of second relatively small multiplication terms from the second MPA calculations. |
申请公布号 |
US2014269663(A1) |
申请公布日期 |
2014.09.18 |
申请号 |
US201414212583 |
申请日期 |
2014.03.14 |
申请人 |
FutureWei Technologies, Inc. |
发明人 |
Nikopour Hosein;Bayesteh Alireza;Baligh Mohammadhadi |
分类号 |
H04B7/26 |
主分类号 |
H04B7/26 |
代理机构 |
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代理人 |
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主权项 |
1. A method for detecting low density signature (LDS) transmissions, the method comprising:
calculating, at a detector, a plurality of function nodes (FNs) according to a plurality of received multiplexing signals for a one or a plurality of user equipments (UEs) using a plurality of first message passing algorithm (MPA) computations that map a plurality of variable nodes (VNs) corresponding to the UEs to the FNs and using a priori information in an initial vector of probabilities for each of the VNs; excluding from the first MPA computations a plurality of first relatively small multiplication terms; updating the probabilities for the VNs using the last calculated FNs and a plurality of second MPA computations that map the FNs to the VNs; and excluding a plurality of second relatively small multiplication terms from the second MPA calculations. |
地址 |
Plano TX US |