engineering computer science MCQ #428

A channel has a bandwidth of 20 MHz and uses QPSK modulation. What is the data rate?

engineering computer science MCQ #428

  1. Question 1

    Q1. A channel has a bandwidth of 20 MHz and uses QPSK modulation. What is the data rate?

    • A) 40 Mbps
    • B) 80 Mbps
    • C) 20 Mbps
    • D) 10 Mbps

    Answer: 80 Mbps

    Explanation: Data rate = bandwidth * log2(L), where L = 4 for QPSK, so 20 * log2(4) = 40 Mbps, but since it's QPSK, it's 2 * 40 = 80 Mbps (using 2 bits per symbol).