Frequency modulation

In this ppt I has explained the Frequency modulation and all its sub parts also like base band modulation & wide band modulation also

1. Frequency modulation By: ch. Gopi Chand

2. In Frequency modulation there are two types 1. Narrow Band FM 2. Wide Band FM First lets know about the frequency modulation

3. The First Frequency Modulation was invented by Edwin Howard Armstrong  in December-18-1890

4. How Frequency modulation Generates

5. Frequency Modulation

6. Block Diagram of FM

7. Frequency Modulation

8. Modulation Index

9. IF Modulation Index ( β) = 1

10. IF Modulation Index ( β) = 25

11. Spectrum of Frequency Modulation

12. Practical Examples of Frequency modulation

13. Advantages of Frequency Modulation Resilient to noise Resilient to signal strength variations Does not require linear amplifiers in the transmitter Enables greater efficiency than many other modes

14. Disadvantages of Frequency Modulation Requires more complicated demodulator Some other modes have higher data spectral efficiency Sidebands extend to infinity either side

15. Narrow Band FM Modulation index is less than 1 Maximum Modulating Frequency is usually 3KHZ and Maximum frequency deviation is 75KHZ

16. Block Diagram of Narrow Band FM

17. Spectrum of Narrow Band FM

18. References B.P.Lathi , Modren Digital And Analog Communication System en.wikipedia.org http://www.radioelectronics.com

19. Any Queries?

20. Thank You