Soft sphere decoder for MIMO maximum likelihood de

专利名称：Soft sphere decoder for MIMO maximum

likelihood demodulation

发明人：Jungwon Lee,Jiwoong Choi申请号：US121377申请日：20100927公开号：US085593B1公开日：20131015

专利附图：

摘要：Methods and apparatus are provided for soft-decision maximum likelihooddemodulation to decode a data vector transmitted in a multiple-input multiple-output(MIMO) communications channel. Soft-decision demodulators are disclosed that

implement sphere decoding to reduce complexity of demodulation while preservingoptimal performance. Candidate signal values associated with the transmitted datavector may be obtained and partitioned into signal bit groups. A sphere search may beperformed over the candidate signal values within a search radius value to determine asmallest distance metric for each signal bit group. The search radius value may beupdated based on a current smallest distance metric for each signal bit group. A log-likelihood ratio (LLR) may be computed from the determined smallest distance metricsfor each signal bit group using a soft-decision demodulator.

申请人：Jungwon Lee,Jiwoong Choi

地址：San Diego CA US,Sunnyvale CA US

国籍：US,US

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