To provide compatibility with global mobile communication system by arranging a subcarrier/time slot of an orthogonal frequency division/ multiplex-time division multi-dimensional connection system so that it corresponds to the subcarrier/time slot of a global mobile communication system.

In a frequency slot, 48 auxiliary carriers are used at an interval of 4.166 Hz in 200 kHz based on 200 kHz which is a frequency band width between the channels of a global mobile communication (GSM) system with an orthogonal frequency division/multiples-time division multi-dimensional connection(OFDM/TDMA) system. The whole length of an OFDM/TDMA time slot containing a guard time becomes about 280 μs with such setting, and therefore two OFDM/TDMA time slots are mapped to one GSM time slot. A known pilot symbol as a GSM frequency channel is inserted at every sixth or eighth subcarrier.