TAILIEUCHUNG - Lecture Wireless and mobile computing – Chapter 8: Transmission fundamentals recap questions/solutions

Chapter 8 - Transmission fundamentals recap questions/solutions. The following will be discussed in this chapter: Frequency and period relationship; representation of a signal by sinusoids; frequency and wavelength relationship; amplitude, frequency and phase; decomposition of a signal; sinusoidal signal period; periodicity in case of linear combination of two signals; signal harmonics elimination (higher order or lower order); channel capacity computation; shannon formula and nyquist criterion; signal to noise ratio. | TRANSMISSION FUNDAMENTALS Recap Questions/Solutions Lecture 8 Overview Frequency and Period Relationship Representation of a signal by sinusoids Frequency and Wavelength Relationship Amplitude, Frequency and Phase Decomposition of a Signal Sinusoidal Signal Period Periodicity in Case of Linear Combination of two Signals Signal Harmonics Elimination (higher order or lower order) Channel Capacity Computation Shannon Formula and Nyquist Criterion Signal to Noise Ratio 2 Frequency Period Relationship Q-: A signal has a fundamental frequency of 1000 Hz. What is its period? 3 According to Fourier analysis, any composite signal is a combination of simple sine waves with different frequencies, amplitudes, and phases. Note Frequency Period Relationship 4 Frequency Domain Concepts Signal is made up of many frequencies Components are sine waves Fourier analysis can show that any signal is made up of component sine waves Can plot frequency domain functions 5 5 In practice, an electromagnetic signal will be made up of many frequencies. It can be shown, using a discipline known as Fourier analysis, that any signal is made up of components at various frequencies, in which each component is a sinusoid. By adding together enough sinusoidal signals, each with the appropriate amplitude, frequency, and phase, any electromagnetic signal can be constructed. Addition of Frequency Components (T=1/f) c is sum of f & 3f (with different amplitudes) 6 6 In Stallings DCC8e Figure , the components of this signal are just sine waves of frequencies f and 3f, as shpwn in parts (a) and (b). 7 Q-1: A signal has a fundamental frequency of 1000 Hz. What is its period? Frequency Period Relationship 8 Q-1: A signal has a fundamental frequency of 1000 Hz. What is its period? Sol: Frequency Period Relationship Period = 1/1000 = s = 1 ms. 9 Q: Express the following in the simplest form you can: a. sin( - π) + sin( + π) b . sin 2πft + sin(2πft - π) 10 Sol: a: -2 sin (2πft) 10 11 b.

• Quản trị mạng
• Mobile computing
• Wireless and mobile computing
• Services data
• Wireless communication
• Transmission fundamentals
• Frequency period relationship
• Mobile computing transmission fundamentals
• Mobile computing simulations
• Network simulation
• Addressing routing
• Visualization tool
• Signals for conveying information
• Digital data transmission
• Mobile systems
• Mobile services
• Lecture Electronic commerce
• Electronic commerce
• Define mobile commerce
• Personal digital assistant
• Wireless mobile computing
• Lecture Mobile applications overview
• Mobile applications overview
• Mobile computing devices
• Mobile applications becoming ubiquitous
• Mobile cloud computing
• Mobile web services
• Cloud computing
• Medical cloud multi agent system
• New mobile medical
• Introduction to Mobile Cloud Computing
• MCC Architecture
• Advantages of MCC
• MCC Applications
• MCC Issues
• Error control
• Digital communication system
• Error detection
• Cyclic Redundancy Check
• Software defined radio
• Satellite communications
• Satellite foot print
• Wireless LAN technology
• Electromagnetic radiation spectrum
• Wireless media standards
• Requirement of protocol
• OSI model
• Protocol suit
• Network access layer
• Transport layer