Method and apparatus for transmitting/receiving data using satellite channel

According to the present invention an apparatus and method for transmitting data using a satellite channel are provided. The apparatus comprises an encoder configured to channel-encode bit data using a code, an interleave configured to interleave the encoded data, and a modulator configured to modulate the interleaved data according to a Continuous Phase Modulation (CPM) scheme using four symbols. The present invention further provides an apparatus and method for receiving data using a satellite channel. The apparatus comprises a demodulator configured to demodulate data transmitted through the satellite channel according to a Continuous Phase Modulation (CPM) scheme using four symbols, a deinterleaver configured to deinterleave the demodulated data, and a decoder configured to decode the deinterleaved data.