graph shows above is a general block diagram of a digital communication system. Furthermore‚ this system should be in the environment of Ultra High Frequency which frequency should between 300-3000 MHZ. To be more specific‚ the digital source in this model includes 3 types of data: the first one is the digitized ‘telephone quality’ voice which is a voice signal‚ the other two are the imagine signal‚ one is from the patient monitor and the other one is from the digital camera. In addition‚ the monitoring
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CHAPTER 1 INTRODUCTION In this project‚ the wifi hotspot is implemented using HSDPA because of its features like Hybrid ARQ ‚ Adaptive modulation and coding‚ High speed downlink shared channel. This features enhance wifi hotspots to support an evolution towards more sophisticated network and multimedia services‚ the main target of HSDPA is to increase user peak data rates‚ quality of service‚ and to generally improve spectral efficiency for downlink asymmetrical services. HSDPA can achieve
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2.2. Integrated Services Digital Broadcasting (ISDB) 5 1.2.3. Media FLO 5 1.3. DVB Technologies 5 1.3.1. DVB-SH 5 1.3.2. DVB-IPDC 6 1.3.3. DVB-T 7 1.3.4. DVB-H 7 1.4. DVB-H vs. mobile streaming 3G 8 1.5. Benefits of DVB-H 9 1.6. Business Model 10 1.6.1. New markets 11 1.6.2. Revenue from subscription fees 11 1.6.3. Increased advertising revenue 11 2. Basic Operation of DVB-H 12 2.1. Operational Overview 12 2.1.1. Backward Compatibility 13 2.2. Improvements on DVB-T physical layer
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EE 205 Lecture Notes 2012 Combinational Logic Combinational Logic: The outputs depend on the present values of inputs. In other words‚ they are logic combinations of the inputs. Sequential Logic: The outputs depend not only on the present but also on the past inputs. Problem Statement Truth Table min. number of gates min. number of inputs to gates Simplification min. propagation time min. number of interconnections Implementation type of gates Adders Half-adder performs
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DCN VIVA QUESTIONS 1. What do you mean by data communication? Ans: It is the exchange of data between two devices via some form of transmission medium such as wire cable. The communicating system must be part of a communication system made up of a combination of hardware and software. The effectiveness of a data communication system depends on three fundamental characteristics: delivery‚ accuracy and timeliness. 2. What is simplex? Ans: It is the mode of communication between two devices in which
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often follows the first strategy today. For instance‚ consider the task of adding FEC (forward error correction) bits to transmissions over a noisy channel such as wireless. In current designs‚ the number of added bits tends to be a function of the anticipated bit error rate [2‚ 4‚ 18]‚ and independent of the available spectrum resources. This method protects against packet loss as long as the bit error rate is below the anticipated rate‚ but fails when it is higher or
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-Smith‚ Smith‚ Smith‚ and Smith Elimination of errors during transmission is controlled by hardware and software. There are two categories of network errors when it comes to data; Corrupt data‚ data that has been changed during the transmission and Lost data‚ data that does not reach its final destination. When you design a network it should be constructed to prevent‚ detect and correct both the corrupt as well as the lost data errors. Network errors are inherent part of data transmissions and can
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UPGRADING THE PC MEMORY • There are different varieties‚ shapes and voltages of RAM. • When planning an upgrade you need to ensure compatibility by considering the following points: Available slots • If the motherboard memory slots are full‚ it may not be possible to add more Memory or it may be necessary to remove some older‚ low capacity memory Modules to make way for new ones. Physical format • It is preferable to stick to the same module format. This format also determines how many modules
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Ersin Esen and A. Aydin Alatan‚ Member‚ IEEE Abstract—Video data hiding is still an important research topic due to the design complexities involved. We propose a new video data hiding method that makes use of erasure correction capa- bility of repeat accumulate codes and superiority of forbidden zone data hiding. Selective embedding is utilized in the proposed method to determine host signal samples suitable for data hiding. This method also contains a temporal synchronization
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Contents 1 INTRODUCTION 2 BASIC DEFINITIONS 3 FAULTS‚ ERRORS‚ AND FAILURES 4 FAULT DURATION 5 DESIGN TECHNIQUES 6 FAULT-TOLERANT TECHNIQUES 7 TYPES OF REDUNDANCY 8 FAULT-TOLERANT ARCHITECTURE 9 REAL-TIME FAULT-TOLERANT SYSTEMS 10 THE LATENCY PROBLEM 11 APPLICATION AREAS 12 SOFTWARE FAULTS 13 DEPENDABILITY MODELLING 2 5 11 15 19 21 25 33 54 58 62 75 85 1 1 INTRODUCTION Welcome to the ‚ CSE42RFS Real-Time and Fault-Tolerant Systems! Course Objectives Historical Background 2 INTRODUCTION 3 COURSE
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