Patent ID: 7366222

Claim:
A wireless communication system comprising: a transmitter including an orthogonal encoder for converting serially input binary signals to parallel binary signals and orthogonally encoding the parallel binary signals, a first multiplier for multiplying the orthogonally encoded binary signals by an intrinsic spreading code to spread the orthogonally encoded binary signals, and an OFDM (Orthogonal Frequency Division Multiplexing) modulator for OFDM-modulating the spread signals; and a receiver including an OFDM demodulator for demodulating the OFDM-modulated signals, and a maximum likelihood detector for performing a maximum likelihood detection of the demodulated spread signals, the maximum likelihood detector grouping the OFDM-demodulated signals into a predetermined number of blocks, and performing maximum likelihood detection for each of the blocks to get a predetermined number of maximum likelihood detection values, and performing maximum likelihood detection for all of the predetermined number of maximum likelihood detection values.