Code error correcting circuit, code error correcting method, communicating apparatus and communicating method

摘要

A code error correcting circuit (ECT) interleaves original data comprising a sequence of bit data having a length of p bits by arranging the bit data of the original data into a hypothetical matrix of I rows and J columns and then selecting the bit data positioned on the i^th row along an order of the j^th column. The circuit is provided with: a memory unit (2) having a plurality of memory areas each having a length of 2ⁿ bits; a controller (1) for storing the original data to be interleaved into the memory areas respectively; a first data generating device (6, 7, 8) for generating a first data indicating a position of the i^th row in the hypothetical matrix; a second data generating device (9, 10, 11) for generating a second data indicating a position of the j^th column in the hypothetical matrix; an address decoding device (14) for generating address data indicating one of the memory areas, in which the bit data positioned on the j^th column are stored, on the basis of the first data and the second data; and a select data decoding device (15) for generating a bit select data indicating the bit data positioned on the i^th row among the bit data stored in said one of the memory areas, which is indicated by the address data, on the basis of the first data and the second data. The bit data, which are indicated by the bit select data, stored in the memory unit are sequentially outputted along an order of the i^th row and the j^th column in the hypothetical matrix as the interleaved original data.