What do you meant by multitone modulation?

MTM is also referred to as Orthogonal Frequency Division Multiplexing (OFDM), Multi-Carrier Modulation (MCM), and Discrete Multitone (DMT). It has also been used as a modulation technique for high-speed data transmission [398] over the telephone switched network.

What is a multitone signal?

1.0 Introduction 1.1 What is multi tone? Multi tone signals are composed of multiply single sine waves or tones with a unique amplitude, phase and frequency. In the spectrum domain, the multi tone or RF energy will be present at a unique frequency.

What is amplitude modulation and how does it work?

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the carrier wave is varied in proportion to that of the message signal, such as an audio signal.

What type of modulation is used in discrete multitone technique?

DMT uses the fast Fourier transform (FFT) algorithm for modulation and demodulation. Dividing the frequency spectrum into multiple channels allows DMT to work better when AM radio transmitters are present. Within each channel, modulation uses quadratude amplitude modulation (QAM).

What is meant by single tone?

single-tone interference: An undesired discrete frequency appearing in a transmission channel. (188) Note: The single-tone interference frequency is the frequency that appears in the channel regardless of the nature of the source.

What is DMT in ADSL?

dmt) is an ITU standard for ADSL using discrete multitone modulation (DMT). dmt full-rate ADSL expands the usable bandwidth of existing copper telephone lines, delivering high-speed data communications at rates up to 8 Mbit/s downstream and 1.3 Mbit/s upstream.

What is DMT modulation technique?

Discrete Multitone (DMT) modulation is a multicarrier technique which makes efficient use of. the channel, maximizing the throughput by sending different numbers of bits on different. subchannels. The number of bits on each subchannel depends on the Signal-to-Noise Ratio of. the subchannel.

What is meant by single tone modulation elaborate?

Single Tone Amplitude Modulation (AM) Definition This means that a carrier signal (fixed frequency signal) is modulated by a large number of frequency components. This type of amplitude modulation is known as single tone amplitude modulation .

What is single tone?

In communications, the ability of the transmitting station to indicate which station in the network is to receive the message. Copyright © 1981-2019 by The Computer Language Company Inc. Link to this page: selective calling