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Atypical sequences are subsequences of long sequences that deviates from the ‘normal’ data. In a previous paper we have developed an information theory approach to such sequences for discrete data. In the current paper we extend this principle to real-valued data, whereby it is possible to use signal processing tools to search for atypical data. The application of this principle is to extract a few...
Optical fiber links have enabled the transmission of very high data rates over both short-range and long-range links. However, the recent growth in the bandwidth demand has created the need to enhance their data rate capacities. While modern modulation techniques and multiple-input multiple-output (MIMO) based mode-division multiplexing (MDM) techniques with multimode fibers (MMFs) have been demonstrated...
The main objective of this paper is to introduce the concept of reconfigurable graphic coding and an implementation of this concept under the form of a functional units library. The heterogeneity of data for 3D graphics objects representation requires the adaptability of the compression schemas. Although these schemas inherently share the same classical data processing chain, the components forming...
In this work, we propose a design and (FPGA) implementation of architecture of an entirely parallel SISO decoder for turbo decoding of the product codes with low complexity for high data rate applications. As an example we study a soft input/output decision decoding for the BCH (31, 26, 3) code. The VHDL design and synthesis of such architecture showed that the use of the structure combining the sub-blocks...
This paper addresses the problem of distortion modeling for video transmission over burst-loss channels characterized by a finite state Markov chain. A distortion trellis model is proposed, enabling us to estimate at the frame level the expected mean-square error (MSE) distortion caused by Markov-model bursty packet losses. A sliding window algorithm is developed to perform the MSE estimation with...
We consider discovering the graph structure of a pairwise Markov random field (MRF) on p binary random variables using n samples from the underlying MRF distribution. We analyze the information-theoretic limitations of this problem under high-dimensional scaling, when the number of connections of each variable in the underlying MRF is bounded by d.We derive both necessary and sufficient conditions...
The traditional error control coding of channel has no long satisfied the requirement of the deep space communication, because of the long delay, great error rate, probability of packet loss, links easily interrupted and so on. The Fountain codes, used in deep space communication, has been introduced and analyzed. The coding and decoding process of LT codes of Fountain codes has been introduced and...
Low density parity check codes are a popular class of linear block codes for forward error correction in communication channels. Recent years have seen a lot of work towards the hardware-oriented constructions for LDPC codes which have comparable error-correcting performance to random construction codes. This paper proposes a novel method called Iterative-filled (IF) to construct LDPC codes and a...
In this paper the algorithm of modelling and the program for coding-decoding of data with the use of the ANSI II symbols table for coding of information report and key are presented. The cryptographic algorithm is realized in Delphi program environment.
This paper studies efficient complex valued matrix manipulations for multi-user STBC-MIMO decoding. A novel method called Alamouti blockwise analytical matrix inversion (ABAMI) is proposed for the inversion of large complex matrices that are based on Alamouti sub-blocks. Another method using a variant of Givens rotation is proposed for fast QR decomposition of this kind of matrices. Our solutions...
In this paper, a novel approach using frame-based iterative channel fading parameters estimation technique from the received data sequence exploiting orthogonal property of the space-time block (STB) code is proposed. For practical implementation of STB code, the receiver requires to estimate these parameters. Regarding this type of estimation, the inherent orthogonal nature of STB code can be exploited...
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