'Frequency shift keying' diaporamas de présentation

Digital Modulation

2.22k views • 72 slides

Telecommunication Network

1.39k views • 62 slides

Modulation of Analog Signals

Modulation of Analog Signals. Amplitude Modulation (AM) Frequency Modulation (FM) Phase Modulation (PM). Analog-to-analog modulation. Types of analog-to-analog modulation. Note:. The total bandwidth required for AM can be determined from the bandwidth of the audio signal: BWt = 2 x BWm.

886 views • 47 slides

Wireless Applications

Wireless Applications. Why Wireless?. Flexible Low cost Easy to deploy Support mobility. Wireless Technologies. BW. UWB. WiMax. WiFi. 3G. Bluetooth. RFID. range. Basics of Wireless Communication. Signal Frequency allocation Signal propagation Antennas Multiplexing.

690 views • 45 slides

Chapter 5

697 views • 43 slides

Chapter 5 ???? ?? (Analog Transmission)

Chapter 5 ???? ?? (Analog Transmission). 5 ? ???? ??. 5.1 ??? - ? - ???? ?? 5.2 ???? ?? ?? 5.3 ? ?. 5.1 ??? - ? - ???? ??. Digital-to-analog conversion is the process of changing one of the characteristics of an analog signal based on the information in digital data. .

980 views • 41 slides

Ch 5 Angle Modulations and Demodulations

ENGR 4323/5323 Digital and Analog Communication. Ch 5 Angle Modulations and Demodulations. Engineering and Physics University of Central Oklahoma Dr. Mohamed Bingabr. Chapter Outline. Nonlinear Modulation Bandwidth of Angle Modulation Generating of FM Waves Demodulation of FM Signals

1.54k views • 40 slides

Mobile Communications Chapter 2: Wireless Transmission

Mobile Communications Chapter 2: Wireless Transmission. Frequencies Signals Antenna Signal propagation. Multiplexing Spread spectrum Modulation Cellular systems. 2.0.1. Frequencies for communication. twisted pair. VLF = Very Low Frequency UHF = Ultra High Frequency

853 views • 38 slides

What is a signal ?

What is a signal ?. A function of one or more independent variables which contain some information. Voltage, Current ,temperature are all different signals. Thus signal is a mathematical representation of any physical energy. Objectives. What is signal , its types What is modulation

998 views • 36 slides

Chapter 7

Chapter 7. Fundamentals of Digital Transmission. Baseband Transmission (Line codes). ON-OFF or Unipolar (NRZ) Non-Return-to-Zero. Polar (NRZ). Performance Criteria of Line Codes. Zero DC value Inherent Bit-Synchronization Rich in transitions Average Transmitted Power

561 views • 35 slides

Figure 5.25 Types of analog-to-analog modulation

Figure 5.25 Types of analog-to-analog modulation. Figure 5.26 Amplitude modulation. Figure 5.29 Frequency modulation. Modulation och demodulation. Baudrate = antal symboler per sekund. Enhet: baud eller symboler/sekund. Bitrate = datahastighet. Enhet: bps eller bit/s.

631 views • 33 slides

Chapter 2 Fundamentals of Data and Signals

Chapter 2 Fundamentals of Data and Signals. Introduction. Data are entities that convey meaning Signals are the electric or electromagnetic encoding of data Computer networks and data/voice communication systems transmit signals Data and signals can be analog or digital.

1.07k views • 31 slides

SIMS-201

476 views • 25 slides

Presented by Mike Shorthose

VDL Mode 4 Overview and development status. Presented by Mike Shorthose. Helios Technology Ltd Chamberlain House High Street Bagshot Surrey UK. Introduction. Basic principles Status of standards Equipment, trials and assessments Issues. What is VDL Mode 4 ? .

527 views • 21 slides

Lecture #15

IT-101 Section 001. Introduction to Information Technology. Lecture #15. Overview. Communication systems Analog Modulation AM FM Digital Modulation ASK FSK Modems. Communication systems. The block diagram on the top shows the blocks common to all communication systems. Digital.

610 views • 19 slides

Technician License Course Chapter 4 Communicating with other hams

Technician License Course Chapter 4 Communicating with other hams. Special Modes and Techniques. Awards. DXCC Contacting 100 different countries and/or entities WAS Contacting 50 states VUCC Contacting 100 grid squares on VHF/UHF. Special Events.

294 views • 18 slides

Communication System for the AAUSAT-II

338 views • 18 slides

Modulation and Data Transfer

Modulation and Data Transfer. February 21, 2002. References. http://www.technovelgy.com/ct/Technology-Article.asp?ArtNum=2 http://electronics.howstuffworks.com/smart-label1.htm http://www.answers.com/topic/iso-15693

277 views • 16 slides

Chapter 1

250 views • 15 slides

TRB Workshop on Adaptive Traffic Signal Control Systems Jan 9, 2000

TRB Workshop on Adaptive Traffic Signal Control Systems Jan 9, 2000. Session 2 Equipment Requirements for Adaptive Traffic Control SCOOT Axel Reissnecker, EAGLE Traffic Control Systems, Austin, TX. Content of Presentation. Installations in US and Canada System Architecture

295 views • 11 slides