Application of convolutional interleavers in turbo codes with unequal error protection

Abstract

This paper deals with an application of convolu- tional interleavers in unequal error protection (UEP) turbo codes. The constructed convolutional interleavers act as block interleavers by inserting a number of stuff bits into the interleaver memories at the end of each data block. Based on the properties of this interleaver, three different models of UEP turbo codes are suggested. Simulation results confirm that uti- lizing UEP can provide better protection for important parts of each data block, while significantly decreasing the number of stuff bits.