Transmiting/receiving apparatus and method for channel estimating using packet data control channel in a frequency division multiple access communication system and system thereof

In a mobile communication system for transmitting and receiving packet data in accordance with a Frequency Division Multiple Access (FDMA) it relates to channel estimation. Transmitting and receiving apparatus according to an embodiment of the present invention includes a transmitter for transmitting a signal through the pilot channel and the control channel, the transmission of the pilot channel and the receiving signal of the control channel, and the signal and the control of the pilot channel channel using the transmit power information using a receiver to estimate the channel for demodulation of the data channel. The receiver, and a pilot channel receiver for receiving a signal of the pilot channel, the control channel receiver for receiving a signal of the control channel, the transmitter reproduction control channel signal for reproducing the signal of the originally transmitted on the control channel by section and the with the received signal over a pilot channel, and the signal received through the control channel, the control channel signal and a transmission signal the transmitter reproduced by the reproducing unit via the control channel, the transmitter It includes a channel estimation unit configured to estimate a channel by using the transmission power information used for the transmission of the control channel. The channel estimation unit of the signal and the control channel received at a pilot sequence preset, and the signal received at the subcarriers corresponding to the pilot channel, and the reproduced signal, the subcarriers corresponding to the control channel It estimates the channel by using the transmission power information used for the transmission. Channel estimation, FDMA, OFDMA, the pilot channel, the control channel, the transmission power