| 摘要 |
An apparatus for processing a received signal, a method thereof and a method for selecting a mapping rule are provided to supply diversity efficiently by reducing the effect of channel change by multi-antenna transmission. A receiving terminal(200) includes an antenna module(201) having at least two antennas(201a), a fast Fourier transformer module(202) having at least two FFTs(Fast Fourier Transformers)(202a), a demapping module(203), and a reliability information extracting unit including a bit deinterleaver(205), a SISO(Soft-Input Soft- Output) module(206), and a bit interleaver(207). Each of the antennas transmits or receives electromagnetic wave energy for signal transceiving via space. Each of the FFT performs Fourier transform on the signal received via the multi-antenna, which was OFDM modulated and transmitted via a multi-antenna in the transmitting terminal. In particular, the FFT transforms the received signal on a time-domain into that on a frequency-domain. The demapping module coverts the FFT symbol signal into a bit signal. The bit deinterleaver receives the bit signal from the demapping module and then recovers an original order of the bit signal from the order of the bit signal having been interleaved by an interleaver in the transmitting terminal. The SISO module outputs reliability information for each of the bit signal inputted thereto. The bit interleaver changes an order of a bit sequence from the SISO module. And, the reliability information for each signal having the changed order of the bit sequence is delivered to the demapping module. And then by the demapping module, demapping is performed again using the reliability information.
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