This paper reviews orthogonal frequency division multiple (OFDM) which has been adopted as a standard for various high data rate wireless communication systems. However, implementation of the OFDM system entails several difficulties. One of the major drawbacks is the high peak-to-average power ratio (PAPR) which cause large number of sub-carriers, that make restrictions for practical applicatio...

This article studies a vital issue in wireless communications, which is the transmission of audio signals over wireless networks. It presents a novel interleaver scheme for protection against error bursts and reduction the packet loss of the audio signals. The proposed technique in the article is the chaotic interleaver; it is based on chaotic Baker map. It is used as a randomizing data tool to...

Classical CTL temporal logics are built over systems with interleaving model concurrency. Many attempts are made to fight a state space explosion problem (for instance, compositional model checking). There are some methods of reduction of a state space based on independence of actions. However, in CSM model, which is based on coincidences rather than on interleaving, independence of actions can...

Time interleaving is a technique that allows the use of multiple identical analog-to-digital converters1 (ADCs) to process regular sample data series at a faster rate than the operating sample rate of each individual data converter. In very simple terms, time interleaving (IL) consists of time multiplexing a parallel array of M identical ADCs, as shown in Figure 1, to achieve a higher net sampl...

The use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can significantly improve the downlink bit error rate (BER) performances of DSand MCCDMA in a frequency-selective fading channel. However, the uplink BER performance degrades due to a strong multi-user interference (MUI). In this paper, we propose frequency-interleaved spread spectrum (SS) using M...

In this paper the particularities of the interleavers used in the case of the Recursive Systematic Convolutional Code (RSC), n/(n+2) rate, with n=2, unpunctured non-binary turbo codes (NBTC) were described. The interleavers: block, pseudo-random and new interleaving methods are presented. These new interleaving methods were elaborated starting from the particular form of the date accepted by no...

The study of Multiple Soft errors on memory modules caused by radiation effects represents an interesting field of current research. The fault tolerance of these devices in radiation environments is traditionally analyzed and increased by means of soft error protection mechanisms as EDAC codes or physical interleaving. As Communication System interleavers are mainly implemented using memories, ...

H.264/AVCis currently the most widely adopted video coding standard due to its high compression capability and flexibility. However, compressed videos are highly vulnerable to channel errors which may result in severe quality degradation of a video. This paper presentsa concealment aware Unequal Error Protection (UEP) scheme for H.264 video compression using Reed Solomon (RS) codes. The propose...

for dissemination) In this document, we discuss the main features of Web scale reasoning and develop a framework of interleaving reasoning and selection. We examine the framework of interleaving reasoning and selection with the LarKC platform. The framework is explored further from the following three perspectives: i) Query-based selection. We propose various querybased strategies of interleavi...

-In this paper the origins of crosstalk in DWDM millimetre hybrid fibre radio networks are discussed. A means by which polarisation interleaving might be implemented with a view to reducing the impact of crosstalk is explained analytically. It is concluded that with standard fibre and continuous wave transmission polarisation interleaving provides little benefit if used over distances greater t...