What type of multiplexing is used in mobile phones?(a) Frequency division multiplexing(b) Time division multiplexing(c) Code division multiplexing(d) Phase multiplexingI had been asked this question in class test.Query is from Modulation and Multiplexing in portion Introduction to Electronic Communication of Avionics

What type of multiplexing is used in mobile phones?(a) Frequency divis

1.	What type of multiplexing is used in mobile phones?(a) Frequency division multiplexing(b) Time division multiplexing(c) Code division multiplexing(d) Phase multiplexingI had been asked this question in class test.Query is from Modulation and Multiplexing in portion Introduction to Electronic Communication of Avionics
Answer» CORRECT choice is (C) Code division multiplexing The explanation: In code-division multiplexing, the SIGNALS to be transmitted are converted to digital data that is then uniquely CODED with a faster binary code. The signals modulate a carrier on the same frequency. All use the same communications channel simultaneously. The unique coding is used at the RECEIVER to select the desired signal.

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