Patent ID: 7127012

Claim:
An apparatus comprising: an internal oscillating unit for generating an internal multicarrier, said internal oscillating unit comprises: a constant containing an increase value of each generation carrier; an accumulator for accumulating constant values of the constant every clock; a reset for initializing the value when the value of the accumulator exceeds one cycle of sine wave; a plurality of delays for keeping the values of the accumulator and returning the values to the accumulator in resetting; a multiplexer and round for multiplexing an output value of the plurality of delays and rounding it off; a lookup table having a storage of a sine value, for outputting a sine value corresponding to each carrier with an address as the value rounded off by the multiplexer and round; and a demultiplexer for demultiplexing the sine value and outputting a sine signal of each carrier frequency as an oscillating signal; a plurality of frequency transition units for respectively down-converting the internal multicarrier generated by the internal oscillating unit and moving it to frequency of “0” as a frequency center; and a plurality of filtering units for individually filtering a respective carrier moved by the plurality of frequency transition units to the frequency center as the frequency of “0”, through a low frequency pass band and for providing the respective carrier as an input to a rake receiver, wherein the apparatus operates to separate carriers of a multicarrier wireless communication receiver system, and operates to separate carriers from a received external multicarrier signal.