SCALABLE QUADRATURE AMPLITUDE MODULATION SYMBOL SLICING METHOD AND APPARATUS

摘要

A symbol slicing method and a symbol slicing apparatus of a scalable QAM(quadrature amplitude modulation) type are provided to maintain low hardware complexity regardless of the increment of a QAM modulation order by a logic operation using a least significant bit and an overall integral part of a sampling signal for in-phase and quadrature phase axes to be sampled as a digital value. A symbol slicing method in a digital demodulator having a QAM(quadrature amplitude modulation) type comprises the steps of: obtaining a digital integer value by sampling a symbol signal on an in-phase axis or a quadrature phase axis, respectively(S410,S420); and extracting a symbol bit stream on the in-phase axis or the quadrature phase axis using an entire bit stream and a least significant bit value of the digital integer value(S450). The step of extracting the symbol bit stream is characterized by setting the least significant bit value among the entire bit stream as '1'(S430).