'Polar encoding' diaporamas de présentation

8 de febrero del 2001

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Chapter 4

Chapter 4. Digital Transmission. 4.1 Line Coding. Some Characteristics Line Coding Schemes Some Other Schemes. Services. E.g. in the tel. systems electric signals lose their strength over the metallic wire, and used amplifiers create distortion and phase changes.

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DATA ENCODING

DATA ENCODING. Digital-to-digital conversion - Encode digital data into a digital signal - Sending computer data Analog-to-Digital conversion - Digitizing an analog - Sending voice in telephone (Decrease effect of noise ) Digital-to-Analog conversion - Modulating a digital signal

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Chapter 4

Chapter 4. Digital Transmission. 4.1 Line Coding. Some Characteristics Line Coding Schemes Some Other Schemes. Figure 4.1 Line coding. Receiver. Sender. Digital data. Digital data. Encoder. Decoder. Link. Figure 4.2 Signal element versus data element.

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4. TRANSMISI DIGITAL

4. TRANSMISI DIGITAL. Transmisi Digital. Karakteristik Pola-pola penyandian kanal (Line Coding Schemes) Beberapa pola penyandian yang lain. Penyandian kanal (Line coding). Sinyal versus aras data (data level). Komponen DC. Contoh 1.

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Chapter 4

Chapter 4. Digital Transmission. 4.1 Line Coding. Some Characteristics Line Coding Schemes Some Other Schemes. Figure 4.1 Line coding. Figure 4.2 Signal level versus data level. Figure 4.3 DC component. Figure 4.4 Lack of synchronization. Example 3.

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Physical Layer (Part 2) Data Encoding Techniques

Computer Networks Spring 2012. Physical Layer (Part 2) Data Encoding Techniques. Interpreting Signals. DCC 9 th Ed. Stallings. Data Encoding Techniques. Digital Data, Analog Signals [ modem ] Digital Data, Digital Signals [ wired LAN ] Analog Data, Digital Signals [ codec ]

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Base-Band Digital Data Transmission

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Data Communication and Networks. ???????????????????????????????????????. ????? 2 ??????????????????????. ????????????? : ??.????????? ?? ???????. E-Mail : siririth @ gmail.com. Digital Transmission. 2.1 Line Coding. Some Characteristics Line Coding Schemes Some Other Schemes.

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Computer Communication & Networks

Computer Communication & Networks. Lecture 6 Physical Layer: Digital Transmission http://web.uettaxila.edu.pk/CMS/coeCCNbsSp09/index.asp. Waleed Ejaz waleed.ejaz@uettaxila.edu.pk. Physical Layer. Physical Layer Topics to Cover. Signals. Digital Transmission. Analog Transmission.

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Encoding

Encoding. Figure 5-1. Different Conversion Schemes. Figure 5-2. Digital to Digital Encoding. Figure 5-3. Types of Digital to Digital Encoding. Figure 5-4. Unipolar Encoding. Figure 5-5. Types of Polar Encoding. Figure 5-6. NRZ-L and NRZ-I Encoding. Figure 5-7. RZ Encoding.

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Physical Layer (Part 2) Data Encoding Techniques

Advanced Computer Networks. Physical Layer (Part 2) Data Encoding Techniques. Data Encoding Techniques. Digital Data, Analog Signals [ modem ] Digital Data, Digital Signals [ wired LAN ] Analog Data, Digital Signals [ codec ] Frequency Division Multiplexing (FDM)

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Digital Transmission

Digital Transmission. Outline. Line coding Encoding considerations DC components in signals Synchronization Various line coding methods. Line Coding. Process of converting binary data to digital signal. Signal Levels vs. Data Levels. Number of signal levels

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Chapter 4

Chapter 4. Digital Transmission. Example 1. A signal has two data levels with a pulse duration of 1 ms. We calculate the pulse rate and bit rate as follows:. Pulse Rate = 1/ 10 -3 = 1000 pulses/s Bit Rate = Pulse Rate x log 2 L = 1000 x log 2 2 = 1000 bps. Example 2.

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Chapter 4

Chapter 4. Digital Transmission. Figure 4.1 Line coding. Figure 4.2 Signal level versus data level. Figure 4.3 DC component. Figure 4.4 Lack of synchronization. Figure 4.5 Line coding schemes. Note:. Unipolar encoding uses only one voltage level. Figure 4.6 Unipolar encoding. Note:.

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CIT 307 Online Data Communications

CIT 307 Online Data Communications. Digital Transmission. Kevin Siminski, Instructor. Module 5. Linecoding. Characteristics Line Coding Schemes Other Schemes. Line Coding. Signal level versus data level. DC Component. Lack of synchronization. Why is timing important?.

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Module 3.1: Encoding and Modulating

Module 3.1: Encoding and Modulating. Conversion Schemes D to D Conversion A to A Conversion A to D Conversion D to A Conversion Final comments Why 56k modems, not more?. Different Conversion Schemes. Some Jargon: D to D encoding or conversion.

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Pulse Modulation CHAPTER 4 Part 3

Pulse Modulation CHAPTER 4 Part 3. Differential PCM (DPCM) Delta Modulation (DM) Noise in Delta Modulation Digital Modulation. Differential Pulse Code Modulation (DPCM).

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Data Conversion Methods

Data Conversion Methods. Sending data from one place to the next ? Transform data into signals Formats of source vs. medium Format of the original data (analog/digital) Format used by the communication hardware (analog/digital) 4 possible combinations

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