A wireless communication system includes a pilot addition decision portion for deciding whether to add pilot symbols which are separate from the basic pilot symbols, to frames; a control symbol generation portion for generating control symbols including information related to additional pilot symbols; a frame assembly portion for assembling frames to which pilot symbols are added according to pilot addition decision; a transmission portion for transmitting the frames; and the reception device includes a control symbol demodulation portion for demodulating control symbols included in the received frames, and judges whether or not additional pilot symbols are included in the received frames based on the control symbol information; a data symbol demodulation portion for demodulating data symbols based on a propagation path estimation value which is estimated using the additional pilot symbols or using the additional and basic pilot symbols when the additional pilot symbols are included in the received frame.