| 摘要 |
A method and an circuit apparatus for deciding a symbol when receiving a signal coupled with a quadrature signal pair are provided to allow a matrix to be analyzed in a non-cartesian complex coordinate space or a non-exclusion-cartesian complex coordinate space, thereby allowing the reliability of a decision to be decided for a decision process. A method for deciding a symbol when receiving a signal coupled with a quadrature signal pair includes a step of allowing a metric of at least one received point(S(r, Phi)) with respect to at least one nominal point(Se(r, Phi)) in a complex coordinate space to be analyzed. The metric is decided after being analyzed in a non-cartesian complex coordinate space or a non-exclusion-cartesian complex coordinate space. Reliability of the decision is achieved for a decision process. The decision is considered in a polar coordinate space. A euclidean distance between the receiving point and the nominal point is analyzed by the metric. The values of angle and radius projections of the matrix (A1,A2) between the receiving point and at least one nominal point is analyzed by the matrix.
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