Applications of constrained turbo block convolutional codes

Serial concatenation can generate low complex powerful codes. Interleaver in a serially concatenated code (SCC) plays a very important role in determining the performance. Traditional methods of interleaver design generally focus either on increasing the minimum distance of the code or increasing the interleaver gain. Recently, a constrained interleaving technique has been introduced to increase the minimum distance while simultaneously maintaining a high interleaver gain. As a result, SCCs constructed with constrained interleaving can perform better than those constructed with traditional interleaving methods. Due to their improved performance, SCCs with constrained interleaving can be constructed with simpler component codes and/or shorter interleaver sizes thereby reducing decoding complexity and decoding delay.;In this dissertation, SCCs with constrained interleaving are further examined and their suitability for 100 Gbps and beyond applications in the optical transport network (OTN) is examined. Specifically, this dissertation (a) constructs SCCs with constrained interleaving, (b) derives their asymptotic performance bounds and verifies those bounds using computer simulations, (c) quantifies gains that can be achieved with constrained interleavers over other known interleavers, and (d) designs SCCs using constrained interleaving for applications in OTN. It is demonstrated that SCCs constructed with constrained interleaving perform better than other proposed codes or OTN applications with lower encoding/decoding complexity.