Three-Dimensional Interleaver for Improving Forward Error Correction in Next-Generation Wireless Networks

Abstract

Next-generation communication systems achieve higher bit rate by employing spectral efficient techniques and use near Shannon limit channel codes for reducing the bit error rate. The performance of such Forward Error Correction (FEC) codes such as Turbo codes, largely depend on the design of the interleaver. In this paper, different interleaving techniques, their classification, and performance measure matrix are presented. The design of three-dimension interleaver proposed and its pseudo-code is described by considering an example of 375 bit interleaver. Finally, the proposed interleaver is compared with the existing two-dimensional interleaver. It is found that the proposed algorithm achieves a higher spreading factor as compared to the existing one. Thus, it is concluded that increased dimensionality in interleaver improves achievable spreading factor and thereby improved performance of FEC codes.