Patent ID: 8594156

Claim:
A receiver provided in a MC-CDMA (multi-carrier code division multiple access) communication system, comprising: a CP (cyclic prefix) removal unit configured to remove a CP from a time-domain signal; a fast Fourier transform (FFT) unit configured to generate a frequency-domain signal by means of performing Fourier transform for the time-domain signal without the CP; a frequency-domain equalizer (FDE) configured to generate an equalized signal by means of performing frequency-domain equalization for the frequency-domain signal; a CSOK despread spectrum unit configured to receive the equalized signal and a base code and to convert the equalized signal into a despread spectrum signal; a CSOK decision unit configured to receive the despread spectrum signal and to convert the despread spectrum signal into a modulation symbol estimation value and a CSOK symbol estimation value according to a decision mechanism; a modulation symbol demapping unit configured to receive the modulation symbol estimation value and to generate a first part of data bits by means of a demapping process; a CSOK (cyclic-shift orthogonal keying) symbol demapping unit configured to receive the CSOK symbol estimation value and to generate a second part of data bits by means of a CSOK demapping process; and a parallel-to-serial converter (P/S converter) configured to generate a serial data bits based on addition of the first and second parts of data bits.