System and method for multiple-input multiple-output detection using candidate reduction and reduced detection layers
AssigneeSamsung Electronics Co., Ltd.
InventorsJaber Mohammad BORRAN, Jung Hyun BAE
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Abstract
A method of detecting signals in a multiple-input multiple-output (MIMO) communication system is provided. The method includes: receiving a signal vector and a channel matrix; computing, for a detection layer, a filter output based on the signal vector and the channel matrix; selecting, as an initial candidate set for the detection layer, a plurality of constellation points; identifying one or more bits using the initial candidate set; computing log-likelihood ratios (LLRs) for the one or more bits; applying a bounding operation to the LLRs to produce bounded LLRs; and outputting the bounded LLRs for decoding.
Claims19
A method of detecting signals in a multiple-input multiple-output (MIMO) communication system, comprising:
- receiving a signal vector and a channel matrix;
- computing, for a detection layer, a filter output based on the signal vector and the channel matrix;
- selecting, as an initial candidate set for the detection layer, a plurality of constellation points;
- identifying one or more bits using the initial candidate set;
- computing log-likelihood ratios (LLRs) for the one or more bits;
- applying a bounding operation to the LLRs to produce bounded LLRs;
- and
- outputting the bounded LLRs for decoding.
A method of detecting signals in a multiple-input multiple-output (MIMO) communication system, comprising:
- receiving a signal vector and a channel matrix;
- computing, for a detection layer, a filter output based on the signal vector and the channel matrix;
- forming a first set of candidate constellation points along a first axis of the filter output;
- forming a second set of candidate constellation points along a second axis of the filter output;
- combining the first and second sets to form an initial candidate set for the detection layer;
- identifying one or more bits using the initial candidate set;
- computing log-likelihood ratios (LLRs) for the one or more bits;
- applying a bounding operation to the LLRs to produce bounded LLRs;
- and
- outputting the bounded LLRs for decoding.
A method of detecting signals in a multiple-input multiple-output (MIMO) communication system, comprising:
- receiving a signal vector and a channel matrix;
- computing filter outputs for a plurality of layers;
- selecting an initial candidate set of constellation points for one or more of the layers;
- computing corresponding constellation points for remaining layers without forming a candidate set for those layers;
- identifying one or more bits from the plurality of layers, including the remaining layers;
- computing log-likelihood ratios (LLRs) for the one or more bits;
- applying a bounding operation to the LLRs to produce bounded LLRs;
- and
- outputting the bounded LLRs for decoding.
Dependencies are inferred from the claim text.