Distributed LT Codes With Improved Error Floor Performance

Regularized Variable-Node LT Codes with Improved Erasure Floor Performance

We consider the use of extrinsic information transfer charts for the design of Luby Transform (LT) codes over the binary erasure channel (BEC). In particular, we formulate an optimization problem to determine asymptotically good checknode degree distributions in terms of decoder overhead. We further propose a modified encoding scheme that maximizes the minimum variable-node degree, thus optimiz...

Distributed LT Codes with Unequal Error Protection

In this paper, we present a method to provide unequal error protection (UEP) for distributed sources in a two-source single-sink relay network scenario. A simple yet efficient technique to decompose the Robust Soliton Distribution (RSD) into two entirely different distributions by utilizing the concept of deconvolution is presented and these two different distributions are used at two different...

On the Performance of Distributed LT Codes

In this paper we extend previous results on distributed LT codes and focus on the frame erasure rate performance of the corresponding block codes with fixed rate. Specifically, we address modified LT (MLT) codes which resemble LT codes in both structure and performance. First, an MLT code construction scheme for four sources communicating with a single sink via a common relay is presented. Then...

Improved Decoding and Error Floor Analysis of Staircase Codes

Staircase codes play an important role as error-correcting codes in optical communications. In this paper, a low-complexity method for resolving stall patterns when decoding staircase codes is described. Stall patterns are the dominating contributor to the error floor in the original decoding method. Our improvement is based on locating stall patterns by intersecting non-zero syndromes and flip...

Improving the Error Floor Performance of LDCP Codes with Better Codes and Better Decoders