Analog Transmission
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This document discusses analog transmission and digital-to-analog conversion. It is a presentation by the team Blackhole from Sylhet International University. The team members are listed. The presentation will discuss analog transmission, digital-to-analog conversion, and analog-to-analog modulation. It defines analog transmission and digital-to-analog conversion. It also discusses bit and baud rates. The types of digital-to-analog modulation covered are ASK, FSK, PSK, and QAM. Implementations of these modulations are shown. Finally, it discusses the three types of analog-to-analog modulation: amplitude modulation, frequency modulation, and phase modulation.
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Analog Transmission
- 1. ANALOG TRANSMISSION DATA COMMUNICATION TEAM BLACKHOLE SYLHET INTERNATIONAL UNIVERSITY
- 2. TEAM MEMBERS • MD. ABDUS SOBUR SIKDAR ROLL : 22065 • ANWAR HUSSEN ROLL: 22059 • MD. HABIBUR RAHMAN CHOWDHURY ROLL: 22043 • HAWNAN AHMED NAHIAN ROLL: 22026 & • MERAJUL ISLAM JUMAN ROLL: 22072
- 3. WHAT WE WILL DISCUSS • Analog transmission • Digital-to-analog conversion • Analog-to-analog modulation
- 4. ANALOG TRANSMISSION An analog transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable.
- 5. DIGITAL-TO-ANALOG CONVERSION Digital-to-analog conversion is the process of changing one of the characteristics of an analog signal based on the information in digital data.
- 6. BIT AND BAUD
- 7. TYPES OF DIGITAL-TO-ANALOG MODULATION a. ASK b. FSK c. PSK d. QAM
- 8. MODULATION OF DIGITAL DATA: ASK • BASK OR OOK (ON-OFF KEYING) • BANDWIDTH FOR ASK: B = (1 + D) × S
- 9. IMPLEMENTATION OF BINARY ASK
- 10. MODULATION OF DIGITAL DATA: BINARY FSK BANDWIDTH FOR ASK: B = (1 + D) X S + 2ΔF
- 11. IMPLEMENTATION OF BINARY FSK
- 12. MODULATION OF DIGITAL DATA: PSK • BANDWIDTH : THE SAME AS BASK, B = (1 + D) X S • LESS THAN THAT FOR BFSK
- 13. IMPLEMENTATION OF BINARY PSK
- 14. MODULATION OF DIGITAL DATA: QAM • QUADRATURE AMPLITUDE MODULATION • COMBINATION OF ASK AND PSK • BANDWIDTH : THE SAME AS THAT REQUIRED FOR ASK AND PSK
- 15. THE 4-QAM AND 8-QAM CONSTELLATIONS
- 16. TIME DOMAIN FOR AN 8-QAM SIGNAL
- 18. ANALOG-TO-ANALOG MODULATION • Analog-to-analog conversion is the representation of analog information by an analog signal • Modulation is needed if the medium is bandpass in nature or if only a bandpass channel is available to us
- 19. THREE KINDS OF ANALOG-TO-ANALOG a. Amplitude Modulation b. Frequency Modulation c. Phase Modulation
- 22. PHASE MODULATION
- 24. THANK YOU
Editor's Notes
- Thanks Juman Now I’m continue to my discussion Ok Basically Digital to Analog Modulation are 4 types they are… ASK Amplitude Sift keying FSK Frecuency Psk Phase QAM Quadrature amplitude modulation
- Now ill discuss about Amplitude shift keying What is the meaning of ask? The meaning of ask is amplitude shift keying What is ASK ? From the previus sentens we can easily understand that Ask is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave In an ask system the binary symbol 1 is represented by transmitting a fixed amplitude carrier wave and fixed frequency for a bit duration of t seconds
- And then ill say about implementation of ask Here we see digital signal , carrier signal and modulated signal about ask For batter undersstan we use analysis software That is MAT lab Which is more efficient way to visualized
- And then I discuss about fsk Frequency shift keying What is fsk? Fsk is method of transmitting digital signals the 2 binary sate logic 0 and 1 Are each represented by an analog wave form.
- We also try to visualized fsk by matlab Here we see digital signal , carrier signal and modulated signal about fsk I would like to invite my another team member Mr. Habibur Rahman Plese come to explore yor topics
- Phase shift keying Psk is the methosd of digital communication in which the phase of transmitted signal is varied to convey information. There are several methods that can be used to a accomplish psk.
- It is used to The simplest PSK technique is called binary phase-shift keying (BPSK). It uses two opposite signal phases (0 and 180 degrees). The digital signal is broken up timewise into individual bits (binary digits). The state of each bit is determined according to the state of the preceding bit. If the phase of the wave
- QAM (quadrature amplitude modulation) is a method of combining two amplitude- modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is being used in optical fiber systems as bit rates increase;
- Here 1st one is for 4 QAM And second one ofr 8 QAM consaltaion diagram
- This is the actual sinario of 8 qam We generate of signal using previos given constellation diagram
- Modulation is the addition of information to an electronic or optical signal carrier .
- Basically there are 3 types of a to a modulation
- AM in which the voltage applied to the carrier is varied over time
- FM in which the frecuancy of the carrier wave form is varied in small but meaningful amounts.
- PM in which the natural flow of the alternating current wave form is delayed temporarily