Analog Transmission

Editor's Notes

1. 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
2. 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
3. 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
4. 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.
5. 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
6. 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.
7. 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
8. 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;
9. Here 1st one is for 4 QAM And second one ofr 8 QAM consaltaion diagram
10. This is the actual sinario of 8 qam We generate of signal using previos given constellation diagram
11. Modulation is the addition of information to an electronic or optical signal carrier .
12. Basically there are 3 types of a to a modulation
13. AM in which the voltage applied to the carrier is varied over time
14. FM in which the frecuancy of the carrier wave form is varied in small but meaningful amounts.
15. PM in which the natural flow of the alternating current wave form is delayed temporarily