Study on inter- and intra-symbol interleaving succession in multi-binary turbo codes

Data blocks for multi-binary turbo codes are structured in the form of data arrays with R×N size, where R is the inputs number of convolutional component code and N is the block length. To achieve interleaving for these blocks are independently performed two interleavings, along the two dimensions of the block. This paper presents a practical study that answers the question: “which is the better ordering of the two interleavings that provides better performance in turbo-codes?”. The results of investigations have shown a correlation between the two interleaving, and the better ordering is: first - interleaving along the R dimension and second - interleaving along the N dimension.