Patent ID: 7417964

Claim:
An apparatus for transmitting information bit sequences from a BS (Base Station) transmitter to a plurality of users, comprising: a first set of S/P (Serial/Parallel) converters for dividing each of the information bits received in sub-channel units into a plurality of information bit sequences in response to respective users; a plurality of channelizers for spreading the divided information bit sequences using different orthogonal codes, combining the spread information bit sequences into a single sequence associated with the individual users, and outputting the single sequence; a second set of S/P converters for dividing the single sequence, distributing the spread information bit sequences over a plurality of bandwidths capable of mapping-processing the spread information bit sequences with sub-carrier frequencies; a frequency hopper for frequency hopping for preventing each of the bandwidths from overlapping with time-frequency cells given by the given time interval; and an IFT (Inverse Fourier Transform) unit for IFT-processing the spread information bit sequences outputting from the frequency hopper, and generating the IFT-processed result.