Design and Implementation of a Configurable Interleaver/Deinterleaver for Turbo Codes in 3GPP Standard

During the last decade, Turbo codes have been taking an increasing importance in channel coding due to its good performance in error correction. One key component in Turbo codes is the interleaver/deinterleaver pair, often designed as reconfigurable coprocessors able to deal with requirements of large data length variability found in the newest communication standards. In this work we introduce a configurable interleaver architecture for the turbo decoder in 3rd Generation Partnership Project (3GPP) standard. It is implemented under the idea of “iterative modulo computation”. Additionally, the presented solution not only generates the interleaved addresses, but also deals with the flow of data streams through the interleaver. The architecture and FPGA implementation results are also presented.