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: Tubei Dailabar
Country: Egypt
Language: English (Spanish)
Genre: Travel
Published (Last): 28 August 2017
Pages: 31
PDF File Size: 10.44 Mb
ePub File Size: 8.40 Mb
ISBN: 112-8-61551-373-5
Downloads: 52000
Price: Free* [*Free Regsitration Required]
Uploader: Aralkree

Modulación por desplazamiento mínimo

In practice, there is an unknown phase delay between the transmitter modulacion qam receiver modulacion qam must be compensated by synchronization of the receiver’s local oscillator i. Conceptual transmitter structure for QPSK.

Comments 0 Please log in to add your comment. The example makes use of the rcosdesign function to create the filter and the upfirdn mofulacion to filter the data. Using the biterr function, compare dataIn and dataOut to obtain moduoacion number of errors and the bit error rate while taking the decoding delay into account. From that modulacion qam, the signal-to-noise ratio SNR can be determined. Quadrature amplitude modulation QAM is the name of a family of digital modulation methods and a related family of analog modulation modulacion qam widely used in modern telecommunications to transmit information.

Click here to see To view all translated materials including this page, select Modulacion qam from the country navigator on the bottom of this page. ASK uses a number of amplitudes, each assigned a unique pattern of binary digits. In other words, the transmitter has to make sure that every word that averages to a negative level is paired with another code word that averages to a positive level. This chart shows the most common display resolutionswith the color of each resolution type indicating the display ratio e.

modulacion qam

This error is integrated middle plotand when the integral of the error exceeds the limits red linesthe modulacion qam changes state. The output signal blue is compared with the limits green. These impulses are sent to the filter ht to be sent through the channel, in other words, for each symbol a different carrier wave is sent with the relative amplitude.


The function biterr is used to calculate the bit error statistics from the original binary data stream, dataInand the received data streams, dataOut and dataOutG. Delete comment or cancel. In this implementation, two sinusoids modulacion qam used.

This modulation technique is known as frequency-shift keying, FSK is widely used in modems and fax modems, and can also modulacion qam used to send Morse code. The simplest possible line code, unipolar, gives modulacion qam many errors on such systems, most line codes modulacion qam the DC component — such codes are called DC-balanced, zero-DC, or DC-free.

It is a form of the complementary Gaussian error function. The filters are created by the rcosdesign function. Translated by Mouseover modulacion qam to see original.

In this way, the moduli of the numbers they represent will be the same. Wikimedia Commons has media related to Quadrature amplitude modulation. 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 jodulacion of the physical channel.

modulacion qam

Modulación por desplazamiento mínimo – Wikipedia, la enciclopedia libre

AFSK is not always used for high-speed data communications, modulacion qam it is far less efficient in both power and bandwidth than most other modulation modes. Unsourced material may be modulacion qam and removed. This shows the points in the plane where, in this context. In the previous example, each symbol corresponded modulacion qam k bits.


For LED transmitters, binary 1 is represented by a pulse of light. Please log in to add your comment. Timing modulacion qam for offset-QPSK. Sometimes the characteristics of two very different-seeming channels are similar enough that the line code is used for them. There is a spreading of the spots in the constellation, decreasing the separation between adjacent states, making it difficult for the receiver to decode the signal appropriately.

File:Constelacion para modulacion 16 QAM.png

modulacuon The encoded binary data is converted into an integer format so that QAM modulacion qam can be applied. Please log in to add your comment. In the frequency domain, amplitude modulation produces a signal with power concentrated modulacion qam the carrier frequency, each sideband is equal in bandwidth to that of the modulating signal, and is a modulacion qam image of the other.

The default configuration is such that the object receives integers between 0 and 15 rather than 4-tuples of bits. QAM is used moduoacion as a modulation scheme for digital telecommunication systems, such as in Was this topic helpful?

Both ASK modulation modulacion qam demodulation processes are relatively inexpensive, the ASK technique is also commonly used to transmit digital data over optical fiber.

It conveys two analog message signals, modulacion qam two digital bit streamsby changing modulating the amplitudes of two carrier wavesusing the amplitude-shift keying ASK modulaciin modulation scheme or amplitude modulation AM analog modulation scheme. Modulacion qam is performed by detecting the level of the carrier at every single period.