Assume that a cellular system use a speech coder with bit rate of 2.4 Kbps (bits

Question

Assume that a cellular system use a speech coder with bit rate of 2.4 Kbps (bits per second), a channel coder with coding rate of 1/2 and 16QAM modulation. What is the required bandwidth of the system for speech signal transmission? (assume that the bandwidth is equal to the symbol rate) 2.4 KHz 4.8 KHz 3.6 KHz 1.2 KHz Assume that a cellular system use a speech coder with bit rate of 2.4 Kbps (bits per second), a channel coder with coding rate of 1/2 and 16QAM modulation. What is the required bandwidth of the system for speech signal transmission? (assume that the bandwidth is equal to the symbol rate) 2.4 KHz 4.8 KHz 3.6 KHz 1.2 KHz

Explanation / Answer

ANSWER ;-

1.2 kHz

B= (Rb/m) 1/r

     = (2.4 kbps/4) * 1/(1/2)

      = 0.6 * 2

      = 1.2 kHz

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