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In this paper, the principle of normalized minimum-sum (NMS) polar decoding process is explored. It is demonstrated that with one properly chosen parameters for NMS algorithm, performances approach to that of the sum-product (SP) algorithm can be achieved. As well, the complexity reduction is realized by calculating a linear function instead of nonlinear function. Simulation results for successive...
Sparse code multiple access (SCMA) is a nonorthogonal multiple access scheme based on a multi-dimensional codebook with sparse codewords. The sparsity property of SCMA allows the receiver to take advantage of low-complexity message passing algorithm (MPA) detector with maximum likelihood (ML)-like performance. The use of multiple antennas at the SCMA receiver will improve the detection performance...
Exponential increase and global access to read/write memory states in quantum computing simulation limit both the number of qubits and quantum transformations that can be currently simulated. Although quantum computing simulation is parallel by nature, spatial and temporal complexity are major performance hazards, making this an important application for HPC. A new methodology employing reduction...
Cyber-Physical Systems (CPS) are composed of computation, networking, and physical processes. Model-based design is a powerful technique to apply mathematical modeling in CPS design. A model of a physical system is the description of variations in some aspects and properties of the system such as motion, velocity, and pressure. The variations of physical quantities such as motion, velocity, and pressure...
In this paper, the principle of density evolution (DE) combined with the normalized minimum-sum (NMS) decoding process is explored. It is demonstrated that with one properly chosen parameters for NMS algorithm, then almost the same behaviour of sum-product (SP) algorithm is achieved. As well, the complexity reduction is realized by calculating a linear function instead of nonlinear function. Simulation...
Progressive edge-growth (PEG) algorithm was proven to be a simple and effective approach to design good LDPC codes. However, the low-density parity-check (LDPC) constructed by PEG algorithm is of a single code rate. In this paper, we propose a modified PEG algorithm to construct multiple-rate LDPC codes, which is referred to as the multiple-rate PEG (MR-PEG) algorithm. The obtained LDPC codes with...
Business process is also a complex area which receives much attention in recent years especially in increasing productivity and saving cost. Meanwhile, situation at the company allows existing business processes to be enlarged. This paper proposed the performance measurement based on coloured petri net simulation of scalable business processes, which has purpose to compare the performance of scalable...
We present two geometric routing algorithms that reliably deliver messages to all devices in a geocast region. One algorithm is based on flooding, the other on concurrent geometric routing. They are the fist known stateless geocasting algorithms. We formally prove the algorithms correct, evaluate their performance through abstract and concrete simulation and estimate their message complexity.
With the recent advances in the field of autonomous driving, large scale deployment of such vehicles on public roads is both foreseeable and intended by many manufacturers. In order to not only maintain safety, but also driving comfort and comprehensibility at all times it is necessary to develop and implement modularized and standardized interfaces for planning and information exchange. In this paper,...
Machine-to-Machine (M2M) communications is regarded as an important enabler towards the realization of the Internet of Things (IoT). M2M communication also referred to as machine type communication (MTC) enables devices to communicate directly or via a network gateway over the cellular network without or with-limited human intervention. Most MTC devices are operated by batteries and it is very critical...
In this paper, we studied the irregular row weight problem of DVB-S2 LDPC short frame. This problem will cause the failure of decoding. Based on a special structure of check matrix address table, we have achieved a simple and common solution to the problem.
In this contribution, we outline the need for a structured modeling approach based on international standards to drive forth a case study for integrating DER into a micro grid. While this μGrip project also addresses market aspects, we outline the need for a structured way to model interfaces to fit for simulation, our approach taken, and an extension to the current practice of M/490 SGAM-based modeling.
Cloud computing is increasingly based on geographically distributed data centers interconnected by high performance networks. Application of Software Defined Networking (SDN) is studied as an emerging solution to support dynamic network resource management for distributed data centers (DCs) jointly with extensive use of Network Function Virtualization (NFV). SDN/NFV operation takes advantage of orchestration...
Test automation in distributed systems requires new methods in signal simulation for the stimulation of the distributed system. Increasing complexity of electric electronic (E/E) systems enhances the testing-effort. The main challenge is reducing the time consuming manual stimulation in consideration of improving the quality of testing. Currently used systems for test automation with a software-based...
Device-to-Device (D2D) communication has been proposed as a promising way to offload traffic from the cellular network. In this paper, with the joint impact of user preference and selfishness, the D2D assisted content dissemination process is investigated in order to maximize the offloading gain via D2D communications. An alternative group pushing optimization (AGPO) algorithm is proposed to solve...
As cloud services using the virtualized technique are emerging and developing rapidly, protection of cloud services is a key issue. Most research efforts focus on reducing the attack surface observed by the external attackers, which is an impractical solution for a complex system like virtualized infrastructure. In order to deceive the attackers and waste their time and efforts, three attack surface...
During the past decade, natural gas markets have witnessed several critical upheavals: increasing market volatility, greater geopolitical risks and penetration of disruptive technologies. In this fast evolving environment, uncertainty expands without any frontier along many dimensions simultaneously. Against this background of tidal changes, the identification and assessment of incoming economic opportunities...
In this paper, we solve the optimizing problem of designing Low-Density Parity Check codes for two parallel erasure links based on the known SDP approach. We show that our reformulation is suitable for this optimizing problem. Our results show that the optimal rate code design problem is a good way and worth-mentioning tool. One can extend our work to the other area.
Floating-point arithmetic plays major role in computer systems. Many of the digital signal processing applications use floating-point algorithms for execution of the floating-point computations and every operating system is answerable practically for floating-point special cases like underflow and overflow. The single precision floating point arithmetic operations are multiplication, division, addition...
Optimal path for robot in collision free space is influenced by a number of factors such as path length, total number of turns, and execution time. A* is a well-known grid based path planning approach used for path planning of robots. In this paper, an efficient variation of A*, named Memory Efficient A* (MEA*), is proposed to find optimal path between start and goal point while avoiding obstacles...
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