Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
The performance of NAND flash based solid-state drives (SSDs) is highly dependent on the application's read and write characteristics [3], where "intensity" is defined as ratio of read:write requests, and "write- hot/cold" considers the write frequency. Moreover, NAND flash memory's reliability degrades with write/erase (W/E) cycling. To optimize performance and reliability, conventional...
This paper considers multilevel multithreshold decoder for a self-orthogonal codes. Simulation results for an AWGN channel are reported. New modifications of this decoder provided coding gain improving by a few tenths of dB due to better using of the bits soft information are offered. Recommendations to choose the best algorithms of constituting blocks of the multilevel multithreshold decoder and...
Besides coping with the increasing demand of broadband services, 5th Generation (5G) radio access technology is expected to support mission critical communication (MCC) services targeting very low latencies. In this paper, we investigate the feasibility of the usage of an early Hybrid Automatic Repeat reQuest (HARQ) feedback for reducing the latency of acknowledged transmissions without disregaring...
This paper focuses on the achievable secrecy throughput in the hybrid automatic repeat request (HARQ) protocol over quasi-static Rayleigh fading channels for the wiretap channel model. We propose a scheme that ensures reliable and secure communication utilizing polar coding in conjunction with the HARQ protocol. Security and reliability is ensured even when the instantaneous power of the wiretap channel...
Distributed storage systems aim at providing reliable access to data that is spread across multiple nodes typically at different physical locations to provide better data safety and/or improve the data access speed. By using an erasure code and spreading coded fragments of the data onto the nodes, faster and more reliable access to the data can be guaranteed. By using Random Linear Network Coding...
Recently, physical layer security in the optical layer has gained significant traction. Security threats in optical networks generally impact the reliability of optical transmission. Linear Network Coding (LNC) can protect from both the security threats in form of eavesdropping and faulty transmission due to jamming. LNC can mix original data to become incomprehensible for an attacker and also extend...
High voltage direct current transmission system is for long-distance transmission of electricity. It consists of six functional subsystems. The redundancy and reliability of sub systems are optimized at the same time is an urgent engineering problem. This paper proposed an innovative method using genetic algorithm to optimize the assignment problem of redundancy and reliability of sub systems. The...
The future airspace system is being defined by several initiatives. SESAR in Europe and NextGen in the USA are working towards the modernization of ATM procedures. The foreseen integration of remotely-piloted aircraft in unsegregated airspace is also shaping the future ATM.
Spatially coupled low-density parity-check (SC-LDPC) codes can achieve the channel capacity under low-complexity belief propagation (BP) decoding, however, there is a non-negligible rate-loss because of termination effects for practical finite coupling lengths. In this paper, we study how we can approach the performance of terminated SC-LDPC codes by random shortening of tail-biting SC-LDPC codes...
An emerging requirement for 5G systems is the ability to provide wireless ultra-reliable communication (URC) services with close-to-full availability for cloud-based applications. Among such applications, a prominent role is expected to be played by mobile cloud computing (MCC), that is, by the offloading of computationally intensive tasks from mobile devices to the cloud. MCC allows battery-limited...
In this paper, the fundamental limits of decentralized simultaneous information and energy transmission in the two-user Gaussian multiple access channel (G-MAC) are fully characterized for the case in which a minimum energy transmission rate b is required for successful decoding. All the achievable and stable information-energy transmission rate tuples (R1, R2, B) are identified. R1 and R2 are in...
In shortening based coding design, a certain amount of known information bits (for instance, all 0 bits) will be inserted into each information packet for encoding and be removed before transmission. Since they are known, the decoder can assume a complete codeword in decoding, even those known bits are not delivered at all. Basically, shortening provides a framework to generate a set of more powerful...
The problems of reliable signal transmission for condition monitoring of power equipment in the energy sector during the technical diagnostics are considered. The principles of the combined coding to ensure a high level of reliability of the systems of technical diagnostics are suggested. The technique for calculating the reliability level for the information signals is represented n this paper.
Focusing on error-correction methods and codes, a systems level design is presented for encoding movies and digital information in DNA storage. A source of data (e.g., movies, audio) is compressed, efficiently encoded with redundant information, modulated, and stored in multiple DNA oligonucleotide strands. The goal is to decode the source from the DNA reliably even in the presence of diverse errors...
It is almost an axiom that every cellular wireless system, including the upcoming 5G systems, should be based on data transmissions organized in frames. The frame design is based on heuristics, consisting of a frame header and data part. The frame header contains control information that specifies the sizes of the data packets and provides pointers to their location within the data part. In this paper...
Continuous technology scaling makes NAND flash cells much denser. As a result, NAND flash is becoming more prone to various interference errors. Due to the hardware circuit design mechanisms of NAND flash, retention errors have been recognized as the most dominant errors, which affect the data reliability and flash lifetime. Furthermore, after experiencing a large number of programm/erase (P/E) cycles,...
Traditional hierarchical RAID causes huge GPU overhead and does not support node failure. To resolve this problem, this paper proposes a new hierarchical redundant array of inexpensive disks (RAID)'s parity generation using pass-through GPU in multi virtual-machine (VM) environment. The proposed method reduces GPU overhead and parity generation time, and supports node failure compared to the traditional...
In Wireless Sensor Networks energy (WSN) resources are limited. Most of the energy in a WSN is consumed in communication between the sensor nodes. Packet size is one of the important parameter of the wireless communication. Larger packets have low energy consumption per bit. However larger packets are less reliable. This paper studies packet size optimization in a WSN based on energy throughput and...
Raptor code, as one of the most popular forward error correction codes, has been widely used for reliable transmission over wireless channels. However, there's no standard and effective error checking mechanism in Raptor. In this paper, we fill CRC value in each encoded packet and propose an improved CRC coding approach for Raptor. In our algorithm, we lower the CRC computational complexity by generating...
In this paper, we propose a selectively polarized concatenation structure for polar codes. We first divide the polarized bit-channels into three types, i.e., good, intermediate and bad bit-channels according to their Bhattacharyya parameter. Then, through combining several information blocks, the intermediate bit-channels are further polarized to enhance polarization rate. Theoretical and numerical...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.