Method and apparatus for transmitting and receiving data in multicarrier communication system

A method of transforming data for reception in a multi carrier communication system, the method comprising:

• obtaining, by at least one processor, data blocks from a multi carrier signal received from a transmitter;
• storing, by the at least one processor, the data blocks in at least one memory associated with the at least one processor;
• generating, by the at least one processor, multiplied data blocks by multiplying the stored data blocks and time axis filter coefficients;
• summing, by the at least one processor, the multiplied data blocks;
• generating, by the at least one processor, a fast fourier transform (FFT) performed block by performing, an FFT operation on the sum of the multiplied data blocks;
• and
• performing, by the at least one processor, an equalization process on the FFT performed block to reconstruct original data.

A transmitting device in a multi carrier communication system, the transmitting device comprising:

• a serial to parallel (S/P) converter configured to:
• perform an S/P conversion on input data, the input data being converted into sequential data blocks having a uniform size,
• a filter configured to:
• perform an inverse fast fourier transform (IFFT) operation on the sequential data blocks,
• store the IFFT performed data blocks in at least one memory in the filter,
• generate muliplied data blocks by multiplying the stored IFFT performed data blocks and time axis filter coefficients, and
• sum the multiplied data blocks;
• a parallel to serial (P/S) converter configured to generate serial data by performing a P/S conversion on parallel data generated from the sum of the muliplied data blocks;
• and
• a transceiver configured to transmit a multi carrier signal including the serial data to a receiving device,
• wherein a size of an IFFT is fixed to the uniform size of the sequential data blocks.

A receiving device in a multi carrier communication system, the receiving device comprising:

• a transceiver configured to receive a multi carrier signal from a transmitter transmitting device;
• a filter configured to:
• obtain data blocks from the multi carrier signal,
• store the data blocks in at least one memory in the filter,
• generate multiplied data blocks by multiplying the stored data blocks and time axis filter coefficients, and
• sum the multiplied data blocks;
• at least one processor configured to perform a fast fourier transform (FFT) operation on the sum of the multiplied data blocks to generate an FFT performed block;
• and
• an equalizer configured to perfom an equalization process on the FFT performed block to reconstruct original data.