Radio communication system, radio communication method, and transmitter apparatus and receiver apparatus suitable for use in the same

A radio communication method for performing a radio communication by combining the OFDM modulation method and the CDMA modulation method, the method comprising:

• estimating conditions of propagation paths used in the radio communication arranging information symbols along a direction of a frequency axis in accordance with an arrangement pattern by a single symbol arranger for each information channel, selecting the arrangement pattern for the single symbol arranger based on the estimated conditions of the propagation paths, notifying the single symbol arranger of the selected arrangement pattern, and transmitting a radio communication signal including the arranged information symbols, in a transmitter apparatus;
• and
• receiving the radio communication signal, and rearranging the information symbols included in the radio communication signal along the direction of the frequency axis in accordance with a reverse pattern to the arrangement pattern, in a receiver apparatus.

A transmitter apparatus used in a radio communication system for performing a radio communication by combining the OFDM modulation method and the CDMA modulation method, wherein

• the transmitter apparatus, including a single symbol arranger for each information channel configured to arrange information symbols along a direction of a frequency axis in accordance with an arrangement pattern, is configured to estimate conditions of propagation paths used in the radio communication, to select the arrangement pattern for the single symbol arranger based on the estimated conditions of the propagation paths, to notify the single symbol arranger of the selected arrangement pattern, and to transmit a radio communication signal including the arranged information symbols.