18 Dic Aplicaciones de la modulacion QAM Ana Silvia Arauz L. Es una técnica de modulación digital avanzada que transporta datos, mediante la. 6 Jul M-ary Quadrature Amplitude Modulation M-QAM • Quadrature como de orden m de modulación de amplitud en cuadratura (m-QAM). Modulación QAM Fibras Ópticas by victor_guerrero_

Author: Nikotaur Moogugar
Country: Cayman Islands
Language: English (Spanish)
Genre: Sex
Published (Last): 19 June 2012
Pages: 407
PDF File Size: 12.95 Mb
ePub File Size: 5.26 Mb
ISBN: 850-8-69985-540-8
Downloads: 13408
Price: Free* [*Free Regsitration Required]
Uploader: Vorn

They are encoded separately just like they were in an amplitude-shift keying ASK modulator.

Quadrature amplitude modulation

In this system, the demodulator determines the changes in the phase of the signal rather than the phase itself. February Learn how and when to remove this template message. Modulacion qam can modulacion qam be extended to frequency modulation FM and frequency-shift keying FSKfor these can be regarded as a special case of phase modulation.

QAM is used extensively as a modulacion qam mpdulacion for digital telecommunication systems, such as in Comments 0 Please log in to add your comment. Modulation is done by the large carbon microphone cone shape in the modulacion qam lead.

AFSK differs from regular frequency-shift keying in performing the modulation at baseband frequencies, in modulcaion applications, the AFSK-modulated signal normally is being used to modulate an RF carrier for transmission. Oscillogram of composite PAL signal—two lines. Alternative constellation diagram for rectangular 8-QAM.


The modulafion and sideband amplitudes are illustrated for different modulation indices of FM signals, for particular values of the modulation modulacion qam, the carrier amplitude becomes zero and all the signal power is in the sidebands.


Invited audience members modulacino follow you as you navigate and present People invited to a presentation do not need a Prezi account This link expires 10 minutes after you close the presentation A maximum of 30 users can follow your presentation Learn more modulacion qam this feature in our modulacion qam base article.

Double polarity PAM, In this the pulses are positive and negative. This results in a signal, which reduces problems caused by non-linear distortion. Was this topic helpful? There are modulacion qam ways of eliminating the DC component, Use a constant-weight code, for example, Manchester code and Interleaved 2 of 5.

For the digital television standard, see QAM television. The following three are most significant: In the previous example, each symbol corresponded to k bits. By contrast, the original ITU V.

Please log in to add your comment. In modulacion qam binary mapping plot, notice that symbols 1 0 0 0 1 and 2 0 0 1 0 correspond to adjacent constellation points modulacion qam the left side of the modulackon. Line coding is used for digital data transport.

In amplitude modulation, the amplitude of the modulacion qam is varied in proportion to the waveform being transmitted. Son posibles dos polaridades y dos magnitudes en la salida modulacion qam cada convertidor de 2 a 4 niveles, que son 0.

Views Read Modulacion qam View history. This page has been translated by MathWorks. Expressions modulacion qam the symbol-error rate of rectangular QAM are not hard to derive but yield rather unpleasant expressions. Note The numSamplesPerSymbol variable is not significant in this example but will make it easier to modulcaion the example later to use pulse shaping.


The pattern of voltage, current or photons used to represent the data on a transmission modulacion qam is called line encoding. Usually, each phase encodes a number of bits. Send the link below via email or IM Copy.

As a result, the index m is 0. Some line codes are digital baseband modulation or digital baseband transmission methods, Line coding consists of representing the modulacion qam signal to be transported, by a waveform that is appropriate for the specific properties of the physical channel.

Aplicaciones de la modulacion QAM by ana silvia arauz lozano on Prezi

However its presence provides a means of demodulation using envelope detection, providing a frequency. This is machine translation Modulacion qam by. The qamdemod function is used to demodulate the received data and output integer-valued data symbols. This is achieved typically by transmitting a burst subcarrier or a Pilot modulacion qam.

Neither you, nor the coeditors you shared it with will be able to qwm it again.

Compatibilidad con servicios digitales de datos. Copy code to clipboard. Los datos binarios de entrada se dividen en cuatro canales: A constellation diagram for rectangular QAM. For many years, the Bell Modulacion qam maintained a monopoly on the use of its phone lines, modylacion, the seminal Hush-a-Phone v. According to one definition of modulacion qam signal, the signal is a digital signal.