PHASE RECOVERY DEVICE, PHASE RECOVERY METHOD AND RECEIVER FOR 16 QUADRATURE AMPLITUDE MODULATION DATA MODULATION

摘要

A phase recovery device, a phase recovery method and a receiver for 16 Quadrature Amplitude Modulation (QAM) data modulation are provided. The phase recovery device comprises: a fourth power calculator for calculating fourth power values of respective symbols in a symbol block; a classification unit for classifying the respective symbols in the symbol block based on amplitudes so as to classify the respective symbols in the symbol block into a first category having a large or small amplitude and a second category having an intermediate amplitude; a reference point determination unit for determining a reference point based on the categories of the respective symbols in the symbol block and their fourth power values; a rotation unit for rotating the respective symbols in the symbol block undergone the fourth power operation and being classified into the second category, based on the reference point; and a phase estimation unit for performing phase estimation based on the respective symbols in the symbol block undergone the fourth power operations and being classified into the first category, and the respective symbols in the symbol block undergone the fourth power operations and being classified into the second category.