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WorksheetsQuiz 3: Digital Wireless Communication
Total questions: 10
Worksheet time: 5mins
What is not the advantages of digital communications?
Ability to recover lost information through error correction
Immunity to noise ( ability to function in the presence of noise)
Added security with data encryption and decryption
Ability to transmit signal below the noise level all the time
What are the three different types of multiplexing?
TDMA, FDMA, CDMA
TDAM, FDMA, SDMA
TDD, FDMA, CDMA
FDD, TDD, TDMA
What is the minimum sampling rate required in order to recovered the information signal?
The sampling rate must be at least the same as the highest frequency of the intelligence signal.
The sampling rate must be at least 2 times the highest frequency of the intelligence signal.
The sampling rate must be at least 1.5 times the highest frequency of the intelligence signal.
The sampling rate must be at least 3 times the highest frequency of the intelligence signal.
What FEC (Forward Error Correction Code) is used in the Digital Communication System for mobile radio communication?
Parity-Check
Convolution Codes and Trellis Diagram
Reed Solomon
Combination of Convolution Codes, Trellis and Reed Solomon Codes
What coding technique is used to help to protect against burst errors?
Convolution Codes
Vertibi
Interleaving
Reed Solomon Codes
What is the disadvantages of interleaving?
It adds extra bits to the data
It adds delay to the system
It adds noise to the data
It adds error to the system
