Preview

Analog Modulation

Better Essays
Open Document
Open Document
1682 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Analog Modulation
Amplitude Modulation and Angle Modulation

Abstract— The aim of this document is to improve understanding of amplitude modulation and angle modulation. We have done this by using Lab view. We have shown 4 types of Amplitude Modulation & 2 types of Angle Modulation.
Keywords-amplitude modulation (AM), angle modulation, double side band modulation (DSB), double sideband suppressed carrier modulation (DSB-SC), double sideband full carrier modulation (DSB-FC), single side band modulation(SSB), phase modulation (PM), frequency modulation (FM), m(t)-message signal, A(c)-amplitude of carrier, Am- amplitude of message signal, f(m) or f(c)-frequency, Y(t)-modulated signal, Xc(t)-carrier signal, Wc [Fc=Wc/2pi] frequency of carrier signal, Wm[Fm=Wm/2pi] frequency of message signal, Ka-amplitude sensitivity factor, USB-upper side band, LSB-lower side band, BW-band width, VSB- vestigial sideband modulation
INTRODUCTION
The process of converting information so it can easily be sent through medium is known as Modulation. Basically required for communication purpose (long range medium). Modulation is usually requires a shift of the range of frequencies contained in the information signal of another frequency for suitable range transmission. Modulation can be of different types, we put emphasized on Amplitude Modulation and Angle Modulation.

1. Amplitude modulation

In AM, information signal or message signal varies the amplitude of carrier signal which is of constant amplitude and high frequency .The product of these two signals will be the modulated signal. 1) REPRESTATION: The carrier signal is represented by
Xc(t)=A(t)sinWct ; Wc=2piFc * All terms are defined above.
Message signal is represented by m(t). m (t)= m(t) A(t)sinWct
Modulated signal Y(t) is given as:

2) MODULATION INDEX:
Modulation index also known as modulating factor is ratio of amplitude of message signal to carrier. It should be a number between 0-1 thus


References: * www.mathworks.com. * www.cnx.org * Books: simon haykin
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Good Essays

    Nt1310 Unit 9 Exam Paper
    • 486 Words
    • 2 Pages

    Nt1310 Unit 9 Exam Paper

    For QAM, each carrier is ASK modulated. The two independent signals are simultaneously transmitted and at the receiver, the two signals are demodulated, and the results combined to produce the original binary input.…

    • 486 Words
    • 2 Pages
    Good Essays
    Read More
  • Powerful Essays

    Unit 9 Exercise 1
    • 1118 Words
    • 5 Pages

    Unit 9 Exercise 1

    6. Modulation Speed: (1) Coding of information onto the carrier frequency. Types of modulation include amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM). (2) When light is emitted by a medium, it is coherent, meaning that it is in a fixed-phase relationship within fixed points of the light wave. The light is used because it is a continuous, or sinusoidal, wave (a white or blank form) upon which a signal can be super imposed by modulation of that form. The modulation is a variation imposed upon this white form, a variation of amplitude, frequency, or phase of the light. There are two basic forms of this modulation: one by an analog form, another by a digital signal. This signal is created in the form of the “intelligence” and superimposed…

    • 1118 Words
    • 5 Pages
    Powerful Essays
    Read More
  • Better Essays

    Nt1310 Unit 7 Exercise 1
    • 580 Words
    • 3 Pages

    Nt1310 Unit 7 Exercise 1

    Amplitude Modulation- modulation of the amplitude of a radio carrier wave in accordance with the strength of the audio or other signal…

    • 580 Words
    • 3 Pages
    Better Essays
    Read More
  • Good Essays

    Week 8 It-242
    • 685 Words
    • 3 Pages

    Week 8 It-242

    For a while in the past, we refer the wireless technology as cellular phones. But now, the term "wireless" refers to more varied devices & technologies, like smartphones, computers, printers, headphones and even speakers that connects together in different ways. Today’s wireless phones for example, may include data packets like 3G & 4G cellular radio signals, Wi-Fi and even Bluetooth technologies, these technologies have advance in a fast pace that investing in equipment like 4G phone and/or 802.11x wireless routers can offer you & your business a variety of speed improvements for your money. Now I shall describe the characteristics of every type of wireless signal types so we can learn to use every signal type.…

    • 685 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Unit 1 Assignment 1. What´s Rf Technology?
    • 648 Words
    • 3 Pages

    Unit 1 Assignment 1. What´s Rf Technology?

    The technology in which the parameters such as amplitude, phase and frequency of radio frequency waves are changed so as to transmit and receive the information is known as RF technology or radio frequency technology. In this, the electromagnetic waves that lie in the range of 3 khz to 300 Ghz are used for the wireless communication between the two devices. The signal is modulated at the transmitter end and then the antenna converts this electrical signal into the radio waves and emits them. The medium in which they travel is space. The receiving antenna catches the waves at the receiving end and then the signal is demodulated and converted back to its original form. These waves are highly affected by the interference…

    • 648 Words
    • 3 Pages
    Good Essays
    Read More
  • Better Essays

    A Comparison of Digital and Analog Technologies
    • 1056 Words
    • 5 Pages

    A Comparison of Digital and Analog Technologies

    Telecommunications relies on the transmission of data through different mediums such as a telephone, radio, television, among others. These transmissions are done through two signal types, which are analog and digital. Analog is the first type of transmission type because it is the older and has been around for a lot longer than digital. On the other hand, even though digital transmission is a younger generation, it is currently use in more devices than analog. Each signal has its advantages and disadvantages, but in most scenarios, both need to work together to create an effective transmission. Technologies that convert analog into digital and vice-versa have been created for this purpose. Converting the signals allows for a more cohesive environment because each can be adjusted to work on devices or mediums not made for them originally. The next part of this paper covers the technologies use to convert these signals.…

    • 1056 Words
    • 5 Pages
    Better Essays
    Read More
  • Better Essays

    Analog to Digital Comparison
    • 1389 Words
    • 6 Pages

    Analog to Digital Comparison

    Comparing, and contrasting Amplitude Modulation (AM) to other forms of modulation frequencies an individual will find that (AM)…

    • 1389 Words
    • 6 Pages
    Better Essays
    Read More
  • Satisfactory Essays

    Learning Team Analog And Digital Comparison Paper
    • 527 Words
    • 2 Pages

    Learning Team Analog And Digital Comparison Paper

    In frequency modulation or FM the carrier signal is altered while the message signal remains constant. Some advantages of the form of modulation is it is less susceptible to signal interference or noise this is why they are mainly used in broadcasting and radio communications Frequency modulation has a special effect called capture effect in which high frequency signal will capture the channel and discard the low frequency or weak signals from interference (Electronicshub, 2013). Frequency modulation does have some disadvantages. One being although no special equipment is needed to transmit the signal demodulators are needed to separate the carrier and message signals. Possibly the biggest disadvantage is FM does not have the ability to bounce of building and other structures that may impede its path.…

    • 527 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    What Factors Affect Am and Fm Radio Reception?
    • 2072 Words
    • 9 Pages

    What Factors Affect Am and Fm Radio Reception?

    Communications are carried by waves. One type of communication is AM and FM radio. AM and FM radio’s use radio waves. A radio wave is an electromagnetic wave propagated by an antenna at various frequencies. In AM (amplitude modulated) radio waves, the audio signal changes the amplitude of the carrier wave. In FM (frequency modulated) radio waves, the audio signal changes the frequency of the carrier wave. Australia’s broadcast bandwidth for AM radio is 500-1500 KHz and for FM radio it is 80-108 MHz. AM radio waves can be affected by electrical interference (such as household appliances) and devices oscillating in the same frequency band. FM radio waves aren’t subject to electrical interference but are affected by devices oscillating in the same frequency band.…

    • 2072 Words
    • 9 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Different ways of Modulation Techniques
    • 523 Words
    • 2 Pages

    Different ways of Modulation Techniques

    Modulation is the process in which a signal is entered into and transmitted by a signal carrier. There are several ways signals can be modulated and differ based on the equipment and technique utilized. Three common ways that signals are transmitted include a 56K modem, an asymmetrical digital subscriber line (ADSL), and Wireless Fidelity (Wi-Fi). Each of these methods are effective means of transmitting a digital signal, however, the 56K modem is all but phased out in favor of Wi-Fi which has evolved by way of ADSL.…

    • 523 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Digital and Analog Comparison
    • 1657 Words
    • 7 Pages

    Digital and Analog Comparison

    Technology is constantly changing in communications. The analog signal was used for several years and was limited in number and did not have the ability to handle the amount of data interchange used today, because of the size requirements. Analog signals are still used today, but are more complex and are in most circumstances converted to a digital signal. This paper will compare the different types of analog and digital technology we used and are currently using today.…

    • 1657 Words
    • 7 Pages
    Powerful Essays
    Read More
  • Good Essays

    Communication Opinion Paper
    • 697 Words
    • 3 Pages

    Communication Opinion Paper

    receiver than what the sender intended it to be. The message travels from the sender to the receiver is known as the channel. There are many types of channels that the message can be communicated such as the spoken word, something written, the…

    • 697 Words
    • 3 Pages
    Good Essays
    Read More
  • Better Essays

    Analog and Digital Comparison Paper
    • 1664 Words
    • 5 Pages

    Analog and Digital Comparison Paper

    Analog and digital conversions in telecommunications are a fascinating topic for discussion. This paper will cover examples of special devices that have the ability to convert analog and digital signals. In analog technology, there are also advantages and disadvantages of amplitude modulation, frequency modulation, phase modulation, and quadrature amplitude modulation (QAM). This paper will give a brief description of those advantages and disadvantages, and also offer the specific modulation techniques that are used in a 56K modem, Asymmetrical Digital Subscriber Line, and Wi-Fi. The T(X) and the synchronous optical network (SONET) digital hierarchy will be further explained as well.…

    • 1664 Words
    • 5 Pages
    Better Essays
    Read More
  • Good Essays

    Radio Waves
    • 837 Words
    • 4 Pages

    Radio Waves

    that is traveled from the crest of one wave to the crest of the next.…

    • 837 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    The Best Day in the World
    • 273 Words
    • 2 Pages

    The Best Day in the World

    Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.…

    • 273 Words
    • 2 Pages
    Satisfactory Essays
    Read More

Related Topics