One of the most important key technologies for digital communication systems as well as
storage media is coding theory. It provides a means to transmit information across time and …

We derive new upper bounds on the minimum distance, which turbo codes can maximally
attain with the optimum interleaver of a given length. The new bounds grow approximately …

We define and investigate the direct product of convolutional codes. Properties of generator
and parity check matrices are considered. Free distance of a product convolutional code is …

We consider convolutional and block encoding schemes which are variations of woven
codes with outer warp. We propose methods to evaluate the distance characteristics of the …

In this paper, new upper bounds on the maximum attainable minimum Hamming distance of
turbo codes with arbitrary-including the best-interleavers are established using a …

In this paper we investigate serially concatenated convolutional codes, both with randomly
chosen and designed permutations. We prove that overall minimum distances greater or …

An upper bound on the error probability (first error event) of product convolutional codes
over a memoryless binary symmetric channel, and the resulting error exponent are derived …

FM-DCSK is a non-coherent modulation and demodulation technique that uses chaotic
signals as the carrier. Due to its inherent broadband nature, its good performance of anti …

Minimum shift keying as an instance of continuous-phase frequency shift keying is a
nonlinear modulation which makes designing error correcting codes for it difficult as …