| 摘要 |
<p>Disclosed are a sphere decoding detection method and apparatus, including: preprocessing a received signal to obtain a signal approximate estimation value X pre of the received signal, deducing an initial square radius D 2 of sphere decoding detection according to X pre , and determining the size l of a constellation space according to the current signal to noise ratio of the received signal; according to depth first and sphere constraint rules, searching for a search path depending on the size l of the constellation space and an initial square radius D 2 , and all nodes through which the search path passes falling in a sphere which takes the initial square radius as a radius; after a search path is searched out, and when the sum of local Euclidean distances of the searched-out search path is less than the current square radius, updating the square radius, and re-searching for a search path in a multi-dimensional sphere which uses the received signal as the center of the sphere and the updated square radius as the radius until a search path cannot be searched out, and determining a candidate signal point corresponding to the latest saved search path as the optimum signal estimation point.</p> |
