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In the decoding of the Bose Chaudhuri Hochquenghem (BCH) codes, the most complex block is the Chien search block. In the decoding process of the BCH codes, error correction is performed bit by bit, hence they require parallel implementation. The area required to implement the chien search parallel is more, hence strength reduced parallel architecture for the chien search is presented. In this paper,...
Online compression of I/O-data streams in general purpose computing will enhance the effective I/O bandwidth of processors, the bandwidth of the computer network as well as the storage capacity and the read/write performance of the storage. In this paper, a self-adaptive dynamic partial reconfigurable architecture for the online compression of data streams is introduced. The proposed architecture...
It is almost always assumed that the algebraic structure underlying non-binary Low-Density Parity-Check (LDPC) codes are Finite Fields. However, when considering non-binary LDPC belief-propagation (BP) decoding, Finite Fields are actually over constrained. In this contribution, we discuss the minimal requirements of the algebraic structure used for non-binary LDPC decoding which we denote Finite Division...
1 In this paper we review the previously proposed methods for successive compute-and-forward and discuss about their incompleteness through some examples. Then we present a comprehensive formulation for multi-step successive interference cancellation problem through the asymmetric successive compute-and-forward strategy. It is shown that the generalized formulation includes the previous approaches.
We study the transmission over a cloud radio access network in which multiple base stations (BS) are connected to a central processor (CP) via finite-capacity backhaul links. We propose a lattice-based coding scheme in which the BSs decode linear combinations of the transmitted messages, in the spirit of Compute-and-Forward (CoF), but differs from it essentially in that the decoded equations are remapped...
Adaptive linear programming (ALP) decoders are mainly used for decoding low-density parity-check (LDPC) codes. The principle of ALP decoders is based on generating redundant-parity check equations, which could eliminate fractional solutions of linear programming (LP) decoders. These generated redundant parity check equations increase the error rate performance of decoder. In this paper, LP model is...
Low-Density Parity check (LDPC) codes offer high-performance error correction near the Shannon limit which employs large code lengths and some iterations in the decoding process. The conventional decoding algorithm of LDPC is the Log Likelihood Ratio based Belief Propagation (LLR BP) which is also known as the ‘Sum-Product algorithm’ which gives the best decoding performance and requires the most...
In this paper, we explore different techniques for lossless compression of sensor data on a wireless sensor network. In this work, we applied modify Differential Pulse Code Modulation (DPCM) scheme for our baseline lossless compression. These techniques were applied on sensor types with reasonably predictable data pattern (e.g., temperature sensor, pressure sensor, etc.) allowing about 50% data compression...
This paper describes high performance implementation of DVB-S2 modem on the rad-hard manycore RC64 DSP. Multi-level simulation and development methodologies are described. Modem algorithms are specified, together with implementation details. Efficient parallel processing is enabled by the shared memory architecture, by PRAM-like task oriented programming and by dynamic allocation of tasks to cores...
Automation grows in recent years for manufacturing industries to increase their productivity. Multiple robotic arms are used for handle the materials to lift in flexible directions. Vertical rotation of 360° single arm is considered in this research for position servo drive with brushless DC motor. The load torque of an arm varies depending upon angular displacement due to gravity, so it required...
In this paper, we review advanced synchronization techniques for the internet of things. Our study can be directly applied to the single-carrier IEEE 802.15.4 and IEEE 802.15.6 standards. In particular we display the advantages of using a Code-Aided approach and a Bayesian packet-oriented approach. The performances of several phase-locked loop techniques are compared to different Cramer Rao Bounds...
Recent development and popularity of Flash Memory requires efficient error correction technique on its eco system like gaming and mobile platforms. In this paper, we have addressed an efficient method to decode and correct errors using the parallel computing technique offered by Graphical Processing Unit (GPU). This decoder employs the inversion-less Berleykamp-Massey algorithm (iBMA), and Chein search...
The compressive sensing theory indicates that robust reconstruction of signals can be obtained from far fewer measurements than those required by the Nyquist theorem. Thus, it has great potential in video acquisition and processing in that it can tremendously save the complex compression required by traditional video coding standards. In this paper, we consider reconstruction of compressive-sensed...
The analog implementation of error control decoders is a competitive methodology compared with the digital implementation in power efficiency and throughput. In order to detect uncorrectable frames and early stop the iterative decoding of low-density parity check (LDPC) analog decoders, a probability stopping block using probabilities of satisfied checks is proposed. Simulation results show that the...
This paper addresses to design an R-S (Reed-Solomon) encoder and R-S decoder and verify its functionality on FPGA. An RTL (register transfer logic) code was developed for an R-S encoder that takes a 32-bit input data and produces a 48-bit output. The logic synthesis and optimization of the code was carried out using Quartus II tool. Also, an R-S decoder was developed that decodes the transmitted data.
A delay-less packet-loss concealment (PLC) method for stationary tonal signals is presented, that addresses audio codecs utilizing a modified discrete cosine transformation (MDCT). In the case of a frame loss, tonal components are detected using the last two received spectra and their accompanied pitch information. Phases of the tonal components are subsequently predicted, aiming for a continuous...
The computation of the Log-Likelihood Ratio (LLR) at the channel output may impose great demand of memory and hardware area, especially for high-order modulations. This paper introduces a new approach for the approximation of the LLR in AWGN channels based on the splitting of the original constellation into smaller sectors. Each new sector has a less complex configuration in which it is possible to...
This paper presents a new innovation network architecture for the analytical model by the integration which challenges both fountain code and Markov chain modeling to improve the throughput performance for ideal channel conditions. In this context, the collision result in corrupted packets and the following MAC layer retransmissions consume extra energy. Channel contention is a serious problem in...
The underwater study and communication have gained attention due to the military, commercial and biological purpose. The video monitoring of the underwater activity is carried out by video processing node (VPN) which form a sensor network. The VPN must be power efficient and less complex. The video coding standard such as MPEG and H.26X have a computationally more complex encoder for their working...
This paper discusses the problem of Sundanese into Indonesian text translation, as one of low-resource language pair translation. The number of parallel corpus gives a significant impact on a statistical machine translation. Whereas to date, there are no Sundanese to Indonesian parallel corpus that ready to use. It is, therefore, we apply the PoS Tag rather than only surface form in the translation...
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