Method and apparatus for transmitting/receiving signal in communication system

A method for receiving a signal by a signal reception apparatus in a communication system, the method comprising:

• receiving a signal which is modulated using a modulation scheme based on a Quadrature Amplitude Modulation (QAM) scheme and a Frequency Shift Keying (FSK) scheme using a parameter related to the QAM scheme and a parameter related to the FSK scheme which are detected based on channel quality and an interference component from a signal transmission apparatus.

A signal transmission apparatus in a communication system, the signal transmission apparatus comprising:

• a controller configured to detect a parameter related to a Quadrature Amplitude Modulation (QAM) scheme and a parameter related to a Frequency Shift Keying (FSK) scheme based on channel quality and an interference component;
• and
• a transmitter configured to modulate information bits using a modulation scheme based on the QAM scheme and the FSK scheme which uses the parameter related to the QAM scheme and the parameter related to the FSK scheme.

A signal reception apparatus in a communication system, the signal reception apparatus comprising:

• a receiver configured to receive a signal which is modulated using a modulation scheme based on a Quadrature Amplitude Modulation (QAM) scheme and a Frequency Shift Keying (FSK) scheme using a parameter related to the QAM scheme and a parameter related to the FSK scheme which are detected based on channel quality and an interference component from a signal transmission apparatus.