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METHOD AND APPARATUS FOR SYMBOL DECODING USING TREE PRUNING BASED SPHERE SEARCH
METHOD AND APPARATUS FOR SYMBOL DECODING USING TREE PRUNING BASED SPHERE SEARCH
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机译:基于树修剪的球面搜索进行符号解码的方法和装置
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摘要
An apparatus and method for symbol decoding comprising selecting a degree of freedom (DOF) parameter for a noise vector; selecting a delta probability value; computing a cost function for a lattice point that is one of a discrete set of nominal codeword positions in a hypersphere; selecting a sphere decoding radius based on the DOF parameter, the delta probability value and the cost function; and decoding a symbol using the sphere decoding radius. And, the apparatus and method comprising setting pre-defined threshold probabilities; computing threshold radii based on the pre-defined threshold probabilities; setting an initial sphere radius square to the value of a first threshold radii; finding the Lattice point based on the initial sphere radius square; computing an updated sphere radius square as the minimum of either a cost function or a second threshold radii; and finding a next lattice point based on the updated sphere radius square.
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