Mobile terminal apparatus and channel compensation method of the same

A method of channel compensation in a mobile terminal apparatus for decoding a first channel reception signal received from a base station apparatus after a channel compensation process by using a channel estimation value so as to carry out a decode process on a second channel reception signal received from the base station apparatus in use of the decoding result of the first channel reception signal, wherein a period of time from a completion of receiving said second channel reception signal to a completion of decoding the second channel reception signal is regulated as a predetermined time, said method comprising:

• a channel estimating step for obtaining the channel estimation value of said first channel reception signal by using a plurality of known signals received from the base station apparatus within a channel estimation period;
• a channel compensating step for performing channel compensating process for said first channel reception signal by using the channel estimation value obtained in the channel estimating step;
• and
• a controlling step for controlling said channel estimation period so as to include a known signal which is received after the reception of said first channel reception signal for channel compensation into said plurality of known signals in accordance with remaining time from a completion of the decoding process on said second channel reception signal until the end of said predetermined time.