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Author Question: Which of the following achieves high spectral efficiencies because the spacing of each carrier is as ... (Read 28 times)

formula1

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on: Jul 28, 2018
Which of the following achieves high spectral efficiencies because the spacing of each carrier is as close as theoretically possible?
 
  A. Direct-sequence spread spectrum (DSSS)
  B. Quadrature amplitude modulation (QAM)
  C. Orthogonal frequency-division multiplexing (OFDM)
  D. Code-division multiple access (CDMA)

Question 2

What type of receiver detects the phase shift in the received signal?
 
  A. Binary phase-shift keying
  B. Quadrature phase-shift keying
  C. Differential phase-shift keying
  D. Frequency-shift keying


ryansturges

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

A


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