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Networks-on-chip (NoCs) have become a new chip design paradigm as the size of transistors continues to shrink. Globally-asynchronous locally-synchronous (GALS) on-chip networks are proposed for solving issues such as large clock tree distribution and signal delay variations. More interestingly, for the GALS networks using m-of-n delay-insensitive interconnect, the asynchronous interconnect not only...
Problem of telemetry and telecontrol data transmission systems noise immunity at endpoints implementing in the Internet of Things technology is considered. A method of improving streaming data encryption in open communication channels was proposed. The dynamic change of crypto key using non-linear feedback in shift register data and quasi-periodic reconfigure of the encoder / decoder device in data...
We investigate secure communication over a channel under two different classes of attacks at the same time: a passive eavesdropper and an active jammer. This scenario is perfectly modeled by the concept of arbitrarily varying wiretap channels (AVWCs). It has been shown that uncorrelated codes are not always capable of overcoming the various jamming attacks. On the other hand, correlated random codes...
We investigate the evolution of a delayed feedforward network model with plasticity. It is found that desynchronized and synchronized firing patterns both exist in the feedforward network (FFN) with different synaptic delays. Synaptic delays may play a significant role in bridging rate coding and time coding. Then we focus on the evolution of firing rate and synaptic weights in the FFN network based...
In this research, we attempt to develop for artistic music loop performance on a de facto standard digital DJ system with TouchOSC. Through the analysis on the functions and UI of de facto DJ software and controllers, the 4 shortage of functions for artistic music loop performance were found. Therefore, we built the remote controller system by TouchOSC. It enables to control the complicated music...
Coded caching is a technique that promises huge reductions in network traffic in content-delivery networks. However, the original formulation and several subsequent contributions in the area, assume that the file requests from the users are synchronized, i.e., they arrive at the server at the same time. In this work we formulate and study the coded caching problem when the file requests from the users...
We consider the problem of constructing codes that can correct δ deletions occurring in an arbitrary binary string of length n bits. Varshamov-Tenengolts (VT) codes can correct all possible single deletions (δ = 1) with an asymptotically optimal redundancy. Finding similar codes for δ ≥ 2 deletions is an open problem. We propose a new family of codes, that we call Guess & Check (GC) codes, that...
Deduplication finds and removes long-range data duplicates. It is commonly used in cloud and enterprise server settings and has been successfully applied to primary, backup, and archival storage. Despite its practical importance as a source-coding technique, its analysis from the point of view of information theory is missing. This paper provides such an information-theoretic analysis of data deduplication...
Cloud storage services, such as Dropbox, iCloud Drive, Google Drive, and Microsoft OneDrive, have greatly facilitated users’ synchronizing files across heterogeneous devices. Among them, Dropbox-like services are particularly beneficial owing to the delta sync functionality that strives towards greater network-level efficiency. However, when delta sync trades computation overhead for network-traffic...
The number of IPs running concurrently on an FPGA has increased in recent years. Communication among these IPs has necessitated the introduction of the network on chip (NoC) for low-power, high-performance, and scalable on-chip networking. While NoCs are superior to traditional shared buses, there is an attendant resource overhead incurred by the NoC links, routers and network adapters. We present...
This paper develops a brand new approach towards data transfer using position-modulated pulses. The core idea is to encode a data value in terms of the time gap between two transmitted pulses whose positions are modulated accordingly. It is shown that this concept allows sending a data value using significantly less number of pulses or logical bits as used in conventional packet-based transports....
With advancement in technology, there is an increase in the size of current files, thus leading to a demand in increase in data transfer rate. Line encoding can potentially help in increasing speeds by dramatically reducing overheads without necessitating improvements in SERDES devices. Conventionally this technique is suited for optical fiber communication which involves very low BER, but can also...
In this paper, the authors address the problem of true Cramer-Rao lower bound (CRLB) derivation for a non-data-aided (NDA) vector parameter estimation over non-constant gain flat Rayleigh fading channel (FRFC). General CRLB expressions for carrier frequency offset, carrier phase, symbol timing and signal to noise ratio (SNR) estimation are analytically developed going through the computation of the...
Time synchronization (TS) represents an important necessity for many industries in fields such as communications, manufacturing, and power systems related to electrical networks, microgrids, and renewable energies, among others, because it can ensure that cooperating processes or systems can interoperate correctly; further, the scheduling of specific tasks through a timestamp can be done. Among different...
Dynamic movement primitives prove to be a useful and effective way to represent a movement of a given agent. However, the original DMP formulation does not take the interaction among multiple agents into the consideration. Thus, many researchers focus on the development of a coupling term for the underlying dynamical system and its associated learning strategies. The result is highly dependent on...
We consider the emerging field of music score libraries, where documents rely on a music notation markup language such as MusicXML or MEI. We propose to model as synchronized time-series the music structure that can be extracted from such documents, together with an algebra that operates in closed form and allows manipulations, restructurings, and combinations of music scores stored in a database...
Multiple-Input Multiple-Output (MIMO) systems are very sensitive to carrier phase offset. In this paper, challenges regarding the provision of phase offset in orthogonal space time block codes (STBC) coded MIMO systems over Rayleigh fading channels are addressed. We develop a novel robust phase offsets estimation algorithm for MIMO systems based on STBC codes. Simulation results prove that the proposed...
This paper identifies the challenges involved in designing the 100 Gigabit per second (Gbps) Ethernet Physical Coding Sublayer (PCS) Semiconductor Intellectual property (IP) compliant with IEEE 802.3 standard. Challenges are discussed under the two topics, implementation challenges and verification challenges. Furthermore, our solutions to identified challenges are presented in the paper.
Single clock distribution over a large high performance chip can be very challenging. This led to evolution of globally asynchronous and locally Synchronous (GALS) systems in modern deep sub-micron (DSM) technology. In GALS mostly bundled data protocols which are based on handshake mechanism, are used for data transfer. But these protocols rely on timing assumptions between handshake signals and data...
The paper describes basic methods of data compression without loss and analyzes their advantages and disadvantages. There is a hardware implementation on FPGA of compression algorithm for stream processing of information. This algorithm can be used in applications related to telecommunications networks of distributed control systems.
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