Air communication and Navigation

TABLE OF CONTENTS:

Introduction..2

Amplitude Modulation..3-8

• Single side bands5

• AM senders...7-8

Super compound....10

Noise..11-13

Receiver development.14-15

Lab taste.15-17

Conclusion..18

Reference19

INTRODUCTION

Communication is a both way concept as it needs both sender and a receiver. It is one of the most important process that happens inwardly the aviation industry as it makes life easier, and more at ease . With the advancement in communication these days by the utilization of transmitters and receivers it is necessary to have an understanding about the transmitters and receivers. This covers all the info about the principles of premium modulation transmitters, the stages of a super heterodyne system, noise and interference towards radio reception, and development of receivers which are promptly commonly used today in the aviation industry.



Shows development about the lab experiment of modulation and demodulation with the study of amplitude modulation using balance modulator

Amplitude Modulation

Amplitude Modulation are one of the simplest type of modulation compared to frequency modulation and phase modulation. Its transmitter uses information manifestation Vm(t) to vary the amplitude of the carrier (VCO) to adduce a modulated planetary house VAM(t).

Information signal:

• Before transmitting this signal, it must be first converted into audio into electrical signal with the use of a transducer. After conversion, it is used to modulate a carrier signal.

Carrier signal:

• It is used to reduce the wavelength for efficient transmission.

• It allows the usage of the same stock simultaneously, called multiplexing.

Signals in mathematical form:

• Information: Vm (t)

• Carrier: Vc(t) = Vco sin (2? fc t+ ? )

• Modulated Signal: VAM(t) = {Vco + VM(t)} sin (2 ? fc t+ ?)

Where

V (t) - The voltage of the signal as a function of time

Vo - The amplitude of the signal

f - The frequency of oscillation, number of cycles per second (Hertz =...

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