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Where Is Discrete Multitone Commonly Used?

James H. Sterling • • 6 min read
Where Is Discrete Multitone Commonly Used?

DMT is used across the last mile to support DSL (Digital Subscriber Line

Digital Subscriber Line
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. ... DSL service can be delivered simultaneously with wired telephone service on the same telephone line since DSL uses higher frequency bands for data.
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) services and is also a popular scheme for wideband digital communication systems such as WiMAX (Wireless interoperability for Microwave Access). DMT is also known as OFDM (Orthogonal Frequency Division Multiplexing).

What is the specialty of discrete multitone technique used in ADSL?

Discrete Multi-Tone (DMT), the most widely used modulation method, separates the ADSL signal into 255 carriers (bins) centred on multiples of 4.3125 kHz. DMT has 224 downstream frequency bins and up to 31 upstream bins.

What is the primary advantage of TDM over FDM?

TDM provides greater flexibility and efficiency, by dynamically allocating more time periods to the signals that need more of the bandwidth, while reducing the time periods to those signals that do not need it. FDM lacks this type of flexibility, as it cannot dynamically change the width of the allocated frequency.

James H. Sterling
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James H. Sterling

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.