ANALOG TRANSMISSION

DATA COMMUNICATION

TEAM BLACKHOLE

SYLHET INTERNATIONAL UNIVERSITY

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

WHAT WE WILL DISCUSS

• Analog transmission

• Digital-to-analog conversion

• Analog-to-analog modulation

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.

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.

BIT AND BAUD

TYPES OF DIGITAL-TO-ANALOG MODULATION

a. ASK

b. FSK

c. PSK

d. QAM

MODULATION OF DIGITAL DATA: ASK

• BASK OR OOK (ON-OFF KEYING)

• BANDWIDTH FOR ASK: B = (1 + D) × S

IMPLEMENTATION OF BINARY ASK

MODULATION OF DIGITAL DATA: BINARY FSK

BANDWIDTH FOR ASK: B = (1 + D) X S + 2ΔF

IMPLEMENTATION OF BINARY FSK

MODULATION OF DIGITAL DATA: PSK

• BANDWIDTH : THE SAME AS BASK, B = (1 + D) X S

• LESS THAN THAT FOR BFSK

IMPLEMENTATION OF BINARY PSK

MODULATION OF DIGITAL DATA: QAM

• QUADRATURE AMPLITUDE MODULATION

• COMBINATION OF ASK AND PSK

• BANDWIDTH : THE SAME AS THAT REQUIRED FOR ASK

AND PSK

THE 4-QAM AND 8-QAM CONSTELLATIONS

TIME DOMAIN FOR AN 8-QAM SIGNAL

16-QAM CONSTELLATIONS

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

THREE KINDS OF ANALOG-TO-ANALOG

a. Amplitude Modulation

b. Frequency Modulation

c. Phase Modulation

AMPLITUDE MODULATION

FREQUENCY MODULATION

PHASE MODULATION

COMPARE AMONG THEM

THANK YOU