State-of-the-art systems for the transmission of images over wireless channels generate an embedded bitstream and protect it with a product code where the row code is a concatenation of an outer cyclic redundancy check (CRC) code and an inner rate-compatible punctured convolutional (RCPC) code, and the column code is a Reed-Solomon (RS) code. In previous works, the product code was optimized by...

Abstract Verification approaches for Software Product Lines (SPL) aim at detecting variability-related defects and inconsistencies. In general, these analyses take a significant amount of time to provide complete results an entire, complex SPL. If the SPL evolves, potentially become invalid, which requires time-consuming re-verification entire each increment. However, in previous work we showed...

In this letter, we propose a new ordered decoding scheme for a product code for mobile data communications. The ordered decoding scheme determines the order of decoding for both row and column component codewords according to the probability of decoding the component codeword correctly. Component codewords are decoded independently. To randomize burst errors in both row and column codewords, a ...

In this paper, the combination of equalization and turbo decoding is studied. In the iterative decoding of a product code in block turbo coding system, the equalization process is performed within the iteration loop. The present study aims to investigate the decision feedback equalizer (DFE) incorporated in the iterative decoding. Simulation results show that the more severe the channel interfe...

Unit testing is the first line of defence against software failure. To make the most of this technique the test code should evolve simultaneously with the product code. First, this dissertation explores the possibilities of using dynamic analysis to extract test dependencies. Then we investigate whether heuristic metrics on these dynamic test dependencies provide a measure for the degree to whi...

Developers often copy, or clone, code in order toreuse or modify functionality. When they do so, they also clone any bugs in the original code. Or, different developers mayindependently make the same mistake. As one example of abug, multiple products in a product line may use a componentin a similar wrong way. This paper makes two contributions. First, it presents an empirical s...