We apply joint maximum likelihood (ML) estimation to orthogonal frequency division multiplexing (OFDM) systems and develop a simple receiver structure that gives joint ML estimates of a multipath channel and the transmitted data sequence. Simulation results have confirmed good performance of our algorithm. For a two-path or three-path slow fading channel, our algorithm converges to the case wit...

This paper presents a proposal for modeling agent mobility using UML Sequence Diagram. Our notation is focused on representing agent migration path and includes modeling of three basic mobility elements: agent creation, mobility path and current agent location. Four variants of graphical notation are presented. In a case study we explain one variant of notation that is the most suitable for giv...

The job sequencing technique is used to determine an optimal sequence. It performs a series of jobs by a number of specific orders so that it calculates the optimal cost. In this paper, we propose a novel approach to find an optimal path from source to destination by taking advantage of job sequencing technique. We have used n jobs m machine sequencing technique and this is divided into n jobs ...

Multi-homing at the transport layer is a mechanism that ties one transport layer association to several network interfaces at each communication host, which enabling the two end-nodes to exchange data over several network paths. Stream control transmission protocol (SCTP) supports multi-homing feature. We suggest Concurrent Multipath CommunicationSCTP (CMC-SCTP) which uses multi-homing as a bas...

We consider the multi-robot task allocation (MRTA) problem in an initially unknown environment. The objective of the MRTA problem is to find a schedule or sequence of tasks that should be performed by a set of robots so that the cost or energy expended by the robots is minimized. Existing solutions for the MRTA problem mainly concentrate on finding an efficient task allocation among robots, wit...

Many surgical procedures could benefit from guiding a bevel-tip needle through a sequence of treatment points in a patient. For example, brachytherapy procedures implant radioactive seeds to treat cancer, and biopsy procedures extract tissue samples to test for cancer. A bevel-tip needle has an asymmetric tip that cuts through tissue along a circular arc. By rotating the needle during its inser...

Preliminaries. A graph database G is a finite, directed, edge-labeled, multigraph defined by G = 〈N,Σ,E〉, where N is a finite set of nodes (vertices), Σ is a set of labels, E is a set of directed, labeled edges, and E ⊆ N ×Σ×N . A path p in G is defined as a sequence of n0a0n1 · · · nk−1ak−1nk where ni ∈ N , ai ∈ Σ, and 〈ni, ai, ni+1〉 ∈ E for 0 ≤ i ≤ k. We call the sequence of edge labels Σ∗ of...

A graph G = (V,E), where V is the set of vertices, and E is the set of edges. An edge e ∈ E is an unordered pair (u,v) in undirected graphs, where u,v∈V . In directed graphs, an edge e is an ordered pair. A path from a vertex u to a vertex v is a sequence of vertices (w0,w1, ...wk), where u = w0, v = wk and (wi−1,wi) ∈ E for all 1 ≤ i ≤ k. The path is a cycle if u = v. The length of a path in a...

This paper studies stability of Dynkin’s games value under weak convergence. We use these results to approximate game options prices with path dependent payoffs in continuous time models by sequence of game options prices in discrete time models which can be calculated by dynamical programming algorithms. We also show that shortfall risks of American options in a sequence of multinomial approxi...

Abstract The measurement and analysis of wideband mobile channel are the foundations of network coverage and wireless network optimization. An outdoor propagation measurement campaign in which the sounding signal is PN sequence at 2.6GHz has been performed in Beijing recently, and the result shows that slippage correlation based on PN sequence is capable to probe the channel impulse response (C...