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Which of the following is transmits large amounts of data over multiple closely spaced data streams?

Which of the following is transmits large amounts of data over multiple closely spaced data streams? Correct Answer orthogonal frequency division multiplexing

The correct answer is option 1.

Concept:

OFDM (Orthogonal Frequency Division Multiplexing) is a multicarrier digital modulation technique for transmitting large volumes of data over a number of closely spaced data streams.

  • Orthogonal frequency-division multiplexing (OFDM) is a data transmission technology that splits a single information stream into numerous closely spaced narrowband subchannel frequencies rather than a single Wideband channel frequency.
  • It is mostly used for wireless data transfer, although it may also be utilised for cable and fibre optic connection.
  • Each data bit is sent serially or sequentially one after another in a traditional single-channel modulation scheme.
  • OFDM builds on simpler frequency-division multiplexing (FDM).

Hence the correct answer is orthogonal frequency division multiplexing.

Additional Information

  • Amplitude-shift keying (ASK) is a type of amplitude modulation in which digital data is represented as amplitude fluctuations in a carrier wave. 
  • The direct-sequence spread spectrum (DSSS) modulation method is primarily used to decrease overall signal interference. The transmitted signal is broader in bandwidth than the information bandwidth due to direct-sequence modulation.
  • Frequency-shift keying (FSK) is a frequency modulation system in which digital data is transferred by changing the frequency of a carrier signal in discrete steps.

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