Apparatus and method for power savings by using a re-quantized by the baseband modem

The present invention provides a power saving method in a receiver of a mobile communication system. The method determines the number of CINR (Carrier to Interference plus Noise Ratio), and MCS (Modulation and Coding Scheme) (Least Significant Bit) LSB to the holding, based on the process and the CINR and the MCS information to obtain information required for a receiver the method comprising the steps of holding the number of LSB determined for the process, and the received information, comprises the step of outputting the information that holds the LSB. Baseband modem, re-quantization, Power Saving.