| 摘要 |
An input control apparatus capable of suppressing characteristic deterioration, reducing the circuit scale of a turbo decoder and effectively using memory of the turbo decoder. In this apparatus, control section ( 110 ) acquires information on a coding rate and coding block length of a received signal, determines the number of bits of systematic part Y 1 , and parity parts Y 2 and Y 3 in accordance with the coding rate and/or coding block length and so that the number of bits of one sequence of the parity parts falls below the number of bits of systematic part Y 1 and controls bit number reduction section ( 109 ) so that the determined number of bits is obtained. Bit number reduction section ( 109 ) reduces the number of bits of systematic part Y 1 , and parity parts Y 2 and Y 3 output from separation section ( 108 ) under the control of control section ( 110 ) and decoder ( 111 ) performs turbo decoding using each sequence reduced by bit number reduction section ( 109 ).
|
