To suppress the operation speed of an LSI to a low level, and realize miniaturization, light weight and low cost of a mobile terminal.

Adders 120a-1 to 120a-4 obtain channel estimation coefficients updated on the basis of a multiplication result of a multiplier 110a, ground, the count value of a 2-bit counter 130 or a select signal 600. The 2-bit counter 130 generates a 2-bit numeral value with a predetermined number of clocks, outputs each bit to the adders 120a-2, 120a-3 respectively, and also outputs the 2-bit count value to a memory 140. The memory 140 outputs the channel estimation coefficients before updating to the adders 120a-1 to 120a-4 on the basis of the count value of the 2-bit counter 130 and the select signal 600, and also holds channel estimation coefficients updated in a predetermined memory area on the basis of the count value of the 2-bit counter 130.