| 摘要 |
PROBLEM TO BE SOLVED: To obtain the optimum tap coefficient of a transversal filter even though an environment changes by defining the tap coefficient of the transversal filter of each sector unit and writing it in data when performing following and reading and setting the coefficient when performing reading. SOLUTION: A FIR coefficient management area 27 is provided with a transversal tap coefficient management area start mark 29, a transversal tap coefficient learning test data 30 and an equalization error unachieved flag 31 and a transversal filer tap coefficient storage area 32. When following is performed, the data 30 is read, an equalization error is calculated, and when the equalization error is larger than a target equalization error, the flag 31 is made ON. When the following is performed again, the power supply of a correlator circuit is made ON, the data 30 is read again, and a transversal filter tap coefficient is calculated and written in the area 32.
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