In this paper, we propose a chaotic interleaving scheme for the continuous phase modulation based single-carrier frequency-domain equalization (CPM-SCFDE) system. Chaotic interleaving is used in this scheme to generate permuted versions from the sample sequences to be transmitted, with low correlation among their samples, and hence a better bit error rate (BER) performance can be obtained. The ...

This paper compares bit v.s. symbol interleaving for parallel-concatenated trellis-coded turbo codes, employing the turbo encoder structure proposed in [1]. To compare systems optimized with the same techniques, the paper extends the turboencoder design procedure proposed in [2] to bitinterleaved systems. We discuss a method to jointly design the multiple required interleavers for the bitinterl...

Most coding schemes used in today’s communication systems are designed for memoryless channels. These codes break down when they are transmitted over channels with memory, which is in fact what real-world channels look like since errors often occur in bursts. Therefore, these systems employ interleaving to spread the errors so that the channel looks more or less memoryless (for the decoder) at ...

In this paper, we present a comprehensive performance evaluation of chip interleaving effect on turbo coded direct sequence spread spectrum (DS-SS) system in a frequency non-selective Rayleigh fading channel with antenna diversity reception. At the transmitter, chip interleaver scrambles the SF (spreading factor) chips associated with a data symbol and transforms the transmission channel into a...

In this paper, we test the performance of Space-Time Block Coding (STBC) technique applied to the Power Line channel. Two modulation types are implemented; 4PAM and BPSK. We examine the effect of Convolutional coding and the presence/absence of interleaving. The simulation results are focused on the Bit Error Rate (BER) performance of the system.

In this correspondence, we present a bit-serial architecture for convolving/correlating long numerical sequences by long filter functions. Because of its two-level interleaving structure, the proposed device does not require “wait cycles” between consecutive input samples. As a result, it achieves the highest possible throughput. Cascadability, fault tolerance, feasibility in VLSI technology, a...

In this paper, the performances of a multicarrier modulation (COFDM) system in an urban mobile radio channel is analyzed using a computer-aided analysis tool called SPW. This multicarrier modulation system, with convolutional coding and interleaving, provides an extremely bandwidth efficient and multipath resistant transmission method. COFDM gives a remarkable performance in selective Rayleigh ...

In this paper, we investigate the performance of the Viterbi decoding algorithm with/without automatic repeat request (ARQ) over a Rician flat fading channel with unlimited interleaving. We show that the decay rate of the average bit error probability with respect to the bit energy to noise ratio is of order between df and df + 1 at high bit energy to noise ratio for both cases (with ARQ and wi...

In 5G wireless communications, sparse code multiple access (SCMA) – a multi-dimensional codebook based on specific category of the non-orthogonal (NOMA) technique - enables many users to share resource components with low level detection complexity. The SCMA (MD-SCMA) design presented in this study is constellation rotation and interleaving method. Initially, subset lattice Z 2 used form mother...

One of the main goals of watermarking is to optimize capacity while preserving high video fidelity. This paper describes a watermarking scheme based on the spread spectrum paradigm with capacity enhancement using a state-of-the-art error correction technique – duo-binary turbo coding. A new watermark composition with novel bit-wise watermark bits interleaving scheme and bit-rate control on the ...