Filter reuse method for transmitting and receiving filter bank-based multicarrier signals

A base station for communicating using a multicarrier signal based on a filter bank scheme, the base station comprising:

• a coder which encodes data to transmit;
• a modulator and mapper which performs modulation and mapping on the encoded data;
• and
• a transmission filter determination unit configured to:
• perform an Inverse Fast Fourier Transform on the modulated and mapped encoded data, and
• for a first terminal capable of communicating at a normal power level, allocate non-orthogonal filters to the first terminal, and
• for a second terminal capable of communicating at a power level boosted from the normal power level, allocate an orthogonal filter to the second terminal.

An apparatus of a terminal for using a multicarrier signal based on a filter bank scheme, the apparatus comprising:

• a channel reception unit which performs filtering on an input signal using a non-orthogonal filter or an orthogonal filter and Fast Fourier Transform (FFT) on the filtered input signal, channel estimation based on the FFT-ed input signal, and equalization on the FFT-ed input signal based on a channel estimation result;
• a de-mapper which performs de-mapping on the equalized input signal in a reverse order of mapping performed at a transmission device;
• a channel decoder which performs channel decoding on the de-mapped input signal;
• and
• a reception controller which controls a prototype filter unit to select a filter for signal filtering based on filter information received from a base station.