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As the details that is being encoded only readable with machines, humans cannot compare the malicious data or malicious free data ie, a valid data. QR code is a machine readable encoded form used for data storage in a limited amount of space in an image. Sending of QR code images from one host to another may cause malicious attacks and data may lose in the process of communication. Proxy Re-Encryption...
Modern Electronic Warfare systems need to provide real time location information in a consistent, unambiguous and timely manner. The time difference of arrival (TDOA) techniques used for location determination make use of the method of hyperbolic multilateration. One technique which is widely used for solving non linear hyperbolic equations is the Taylor Series method. This paper discusses the convergence...
Logging-while-drilling (LWD) and measurement-while-drilling (MWD) applications have prompted the development of acoustic telemetry for retrieving downhole data. In this paper, a multilevel frequency shift keying (ML-FSK) modulation transceiver with pseudo-coherent differential energy detection is proposed and optimized for such acoustic telemetry applications. The motivation of employing the proposed...
Drill string acoustic telemetry is an effective transmission method to retrieve downhole data in drilling applications. In practice, pipes used for drilling deep wells have slight variation in length. The arrangement of downhole pipes plays a vital role for improving the transmission efficiency of extensional waves transmitted through the drill string. Finite-difference modeling produce the comb-filter-like...
GPS satellites transmission consists of two pseudorandom noise codes, modulated on two carriers. For position determination of a GPS receiver on the earth two parameters, satellite position and pseudo ranges of each Satellite Vehicle are to be estimated by decoding the Navigation message from each satellite which depends on the Carrier to Noise Ratio (C/N0) at the receiver. GPS employs spread spectrum...
The goal of the paper is to enhance the throughput efficiency of wireless adhoc networks. An adhoc network is a collection of wireless mobile hosts forming a temporary network without the aid of any established infrastructure or centralized administration. Each node is considered to be alike here. It is needed to introduce some intelligence to the adhoc networks in order to improve their throughput...
The towed array electronics is essentially a multichannel real time data acquisition system. The major challenges involved in it are the simultaneous acquisition of data from multiple channels, telemetry of the data over tow cable (several kilometres in some systems) and synchronization with the onboard receiver for accurate reconstruction. A serial protocol is best suited to transmit the data to...
With the integration of IP and optical technology, fast optical network (of the order of 10 Gbps) has emerged to support international research cooperation such as massive scientific data transfer and next generation Internet related research. Therefore, it is important to analyze the measurement issues to guide the high speed transport protocol research for high speed optical network of the order...
The interaction between multicasting and real-time multimedia streams poses various new and interesting problems in research on communication protocols and architectures. For example, display systems of heterogeneous users in the same session may have different or even varying latency, display resolution, and/or processing capabilities. In this paper, we propose a receiver-oriented resource reservation...
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