Patent ID: 7386277

Claim:
A receiver for receiving an information signal and a pilot signal for measuring the quality of a channel, from an external transmitter, the receiver comprising: a demodulation and decoding unit for demodulating and decoding the information signal for detecting information data and cyclic redundancy channel (CRC) data which is used to detect an error contained in the information signal; a channel quality measurement unit measuring the capability of transmission of data of a data channel for receiving the information signal using the pilot signal; and a modulation and coding scheme (MCS) group selection controller for grouping n (where n>0) MCS levels, which are ordered according to the quality of the data channel, into continuous m MCS levels (where n>m>0), for selecting an MCS group according to the quality of the data channel measured by the channel quality measurement unit, for transmitting information on the selected MCS group to the transmitter every predetermined cycle, and for transmitting an ACK signal or an NACK signal to the transmitter depending on whether the CRC data is completely received from the transmitter.