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In a digital continuous-time communication system, the bit rate of NRZ data stream is 1 Mbps and carrier frequency of transmission is 100 MHz. What is the bandwidth requirement of the channel in BPSK and QPSK systems respectively?
  • a)
    2 MHz and 4 MHz
  • b)
    1 MHz and 2 MHz
  • c)
    4 MHz and 2 MHz
  • d)
    2 MHz and 1 MHz
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In a digital continuous-time communication system, the bit rate of NRZ...
The bit period of NRZ data stream is
In BPSK, each binary bit is a symbol, therefore symbol duration Ts = Tb = 1 μs.
∴ The bandwidth required for BPSK system is
In QPSK, we group two successive bits to form one symbol, therefore symbol duration,
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Most Upvoted Answer
In a digital continuous-time communication system, the bit rate of NRZ...
Given information:
Bit rate of NRZ data stream = 1 Mbps
Carrier frequency of transmission = 100 MHz

Bandwidth requirement in BPSK system:
In BPSK system, the bandwidth requirement can be calculated using the formula:

Bandwidth = 2 × (1 + β) × Bit rate

Where β is the excess bandwidth factor and for BPSK modulation, β = 1.

Substituting the given values, we get:

Bandwidth = 2 × (1 + 1) × 1 Mbps = 4 MHz

Therefore, the bandwidth requirement in BPSK system is 4 MHz.

Bandwidth requirement in QPSK system:
In QPSK system, the bandwidth requirement can be calculated using the formula:

Bandwidth = 2 × (1 + β) × Bit rate

Where β is the excess bandwidth factor and for QPSK modulation, β = 0.5.

Substituting the given values, we get:

Bandwidth = 2 × (1 + 0.5) × 1 Mbps = 2 MHz

Therefore, the bandwidth requirement in QPSK system is 2 MHz.

Hence, the correct answer is option D - 2 MHz and 1 MHz.
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Community Answer
In a digital continuous-time communication system, the bit rate of NRZ...
Pls explain
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In a digital continuous-time communication system, the bit rate of NRZ data stream is 1 Mbps and carrier frequency of transmission is 100 MHz. What is the bandwidth requirement of the channel in BPSK and QPSK systems respectively?a)2 MHz and 4 MHzb)1 MHz and 2 MHzc)4 MHz and 2 MHzd)2 MHz and 1 MHzCorrect answer is option 'D'. Can you explain this answer?
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