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In order to improve anti-jamming capability, the tactical data link uses RS (31, 15) coding/decoding in data transmission. In this paper, a RS (31, 15) hardware decoder base on RIBM algorithm is introduced, and this decoder is designed and implemented by pipeline algorithm. To make up the key equation module's deficient in the whole pipeline, a modified RIBM algorithm is proposed, and the logic resource...
The impact of symbol-asynchronism on compute-and-forward strategy in relay networks is considered. The lattice-based coding and decoding scheme presented recently by Nazer and Gastpar is applied over asynchronous distributed networks. While the key idea in compute-and-forward is to decode a linear combination of the transmitted codewords, due to distributed nature of the network, the relays receive...
Inter carrier interference (ICI) is deemed as a critical issue in orthogonal frequency division multiple access (OFDMA) systems. Though ICI caused by Doppler spread is negligible in femtocell systems, frequent reception of signals over misaligned subcarriers will introduce severe ICI. Successive interference cancellation and decision feedback equalizers are some of the techniques proposed to mitigate...
Interactive multiview video streaming (IMVS) is an application that streams to a client one out of N available video views for observation, but client can periodically request switches to neighboring views as the video is played back uninterrupted in time. Previous IMVS works focused on the design of a frame structure at encoding time, trading off expected transmission rate with storage, without knowing...
The recently emerging probability interval partitioning entropy (PIPE) coding scheme offers high coding efficiency at a comparably low complexity level. In this paper, a new set of systematic variable-to-variable length (v2v) codes is proposed for use within the PIPE coding concept that allows the complexity requirements to be reduced even further. The proposed systematic v2v codes can be efficiently...
This paper mainly discusses the time-delay problem of Turbo decoding algorithm, and an improved Log-MAP decoding algorithm is proposed. This algorithm reduces the amount of computation of the whole decoding process by introducing a matrix named Matrix to reduce the repeated numerical computation in the process of the iterative decoding. The improved algorithm is simulated and compared the complexity...
In this paper, an improved chroma interpolation method using 6-tap H.264/AVC[1]–[2] filter with high precision [3] is proposed for HEVC(High Efficiency Video Coding)[4]. Experimental results show that the average BD-rate improvements on chroma U and V components are 12.2% and 13.4%, respectively, in the low complexity case of random access structure, and 4.1% and 5.0%, respectively, in the high efficiency...
Subthreshold SRAM is a significant approach to reduce power consumption in energy-constrained SoC design. For the ultra-low power consideration, the primary concerns of SRAM are stability and reliability instead of performance. In this paper, the proposed 9T bit-cell enhances write ability by cutting off the positive feedback loop of inverter pair. In the read mode, the isolated read path and storage...
The paper proposes a resource efficient solution for Network Coding (NC) based congestion control consisting in identification around the congested links of multiple butterfly topologies by using the Discrete Lagrange Multiplier optimization algorithm. The instantiation of the butterfly topologies is based on the resource management capabilities foreseen for the entities of the future networks. The...
Reversible logic is an emerging nanotechnology used in the design and implementation of nanotechnology and quantum computing with the main goal of reducing physical entropy gain. Significant work have been produced in the design of fundamental reversible logic structures and arithmetic units, and recent developments in sequential design of reversible circuits has opened new avenues in the implementation...
Reversible computation differs from traditional computation in that it preserves information while manipulating it. This new design paradigm has very attractive thermodynamic consequences and holds many applications in current and emerging technologies. Modern computers can reduce power consumption by taking advantage of reversibility, and quantum computers operate reversibly. Researchers have already...
Reversible logic is an emerging nanotechnology widely being considered as the potential logic design and implementation of nanotechnology and quantum computing with the main goal of reducing physical entropy gain. Recent advances in reversible logic allow for new avenues in the implementation of reversible combinational circuits. Part of this advancement is the design and implementation of a finite...
The wireless mesh networks traffic is of self-similarity and the network performance is degraded by self-similar traffic. Network coding is a new technology which improves networks performance. In this paper, an algorithm was presented that used network coding to reduce the queue length and the delay time when self-similar traffic was occurred. The algorithm was based on synchronization after data...
Motivated by live streaming applications using peer assistance, we study burst erasure correction codes with optimal decoding delay for parallel-link networks. We consider a new model for network error correction, where each source symbol is decoded at the sink on-the-fly with a strict decoding deadline. We distinguish two types of errors which have very different implications on the code design --...
There has been extensive work that relies on network coding to increase the resiliency to errors and consequently improve the performance of wireless networks. However, due to the coding operations, these network coding techniques often introduce an additional delay that has a negative impact on TCP traffic. A recent approach, namely online coding, proposes a feedback mechanism for TCP that acknowledges...
This paper presents a practical and general coder and decoder of network coding (NC) with HDL (Hardware Description Language) logic for wire-speed nodes in multisource multicast networks. The NC coders apply random linear network coding (RLNC) and the decoders recover the original packets by Cramer's rule. All these mathematical operations are carried out in the Galois Field (256). The structures...
ARQ for network coding (ANC) can effectively improve the throughput and reliability of transmission. The properties of ANC are analyzed from three different delay definitions which are seeing delay, decoding delay and delivery delay, respectively. Without perfect feedback information, a novel network coding scheme with lossy and delayed feedback (NCLDF) is developed in this paper. Simulation results...
Erasure correcting codes are widely used to ensure data persistence in distributed storage systems. This paper addresses the simultaneous repair of multiple failure in such codes. We go beyond existing work (i.e., regenerating codes by Dimakis et al.) and propose coordinated regenerating codes allowing devices to coordinate during simultaneous repairs thus further reducing the costs. We define optimal...
in order to achieve the reliable decoding when the real-time video compression bit streams are transmitted in radio channel, the effective channel code method is given. It is based on the Turbo product codes with AHA4501. The performance of its delay time and error correction is evaluated. The selection of block size, the iteration number and frame sync header and is described. And the method has...
There have been many research works studying the network coding delay, assuming single network coding point or single hop between source and destination. In this paper, we analyze intensively the network coding delay for a multi-hop path between source and destination along which multiple coding points are permitted to reside. Firstly, extending the previous works we develop a numerical form of the...
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