To construct a block diagram of a BPSK (Binary Phase Shift Keying) demodulator, we need to understand the basic components involved. BPSK is a type of modulation where the phase of the carrier signal is shifted to represent binary data.

1. Start by drawing a block for the input signal, which is the BPSK modulated signal. This signal will be at a frequency of 2 KHz (fb).

2. Next, add a block for the carrier signal generator. This block generates a carrier signal at a frequency of 2 KHz as well.

3. Connect the input signal block to the carrier signal generator block using a multiplication block. This block multiplies the input signal with the carrier signal.

4. Add a block for the phase detector. This block compares the phase of the multiplied signal with the carrier signal and extracts the binary data.

5. Finally, include a block for the output signal, which represents the demodulated binary data.

For the BFSK (Binary Frequency Shift Keying) demodulator, the process is similar, but the carrier signal frequency is different. In this case, the carrier signal frequency is 1 KHz (fc).

To determine which one of these demodulators is a coherent receiver, we need to understand the concept of coherent reception. Coherent reception refers to a demodulation technique where the receiver has knowledge of the carrier signal's phase and frequency.

In the case of BPSK demodulation, the receiver needs to know the phase of the carrier signal to correctly extract the binary data. Therefore, the BPSK demodulator is a coherent receiver.

On the other hand, in BFSK demodulation, the receiver does not require knowledge of the carrier signal's phase. It only needs to detect the frequency changes to extract the binary data. Therefore, the BFSK demodulator is a non-coherent receiver.

In summary, the block diagram for a BPSK demodulator includes an input signal block, carrier signal generator block, multiplication block, phase detector block, and output signal block. The BFSK demodulator has a similar block diagram but with a different carrier signal frequency. The BPSK demodulator is a coherent receiver, while the BFSK demodulator is a non-coherent receiver.

Question

To construct a block diagram of a BPSK (Binary Phase Shift Keying) demodulator, we need to understand the basic components involved. BPSK is a type of modulation where the phase of the carrier signal is shifted to represent binary data.

1. Start by drawing a block for the input signal, which is the BPSK modulated signal. This signal will be at a frequency of 2 KHz (fb).

2. Next, add a block for the carrier signal generator. This block generates a carrier signal at a frequency of 2 KHz as well.

3. Connect the input signal block to the carrier signal generator block using a multiplication block. This block multiplies the input signal with the carrier signal.

4. Add a block for the phase detector. This block compares the phase of the multiplied signal with the carrier signal and extracts the binary data.

5. Finally, include a block for the output signal, which represents the demodulated binary data.

For the BFSK (Binary Frequency Shift Keying) demodulator, the process is similar, but the carrier signal frequency is different. In this case, the carrier signal frequency is 1 KHz (fc).

To determine which one of these demodulators is a coherent receiver, we need to understand the concept of coherent reception. Coherent reception refers to a demodulation technique where the receiver has knowledge of the carrier signal's phase and frequency.

In the case of BPSK demodulation, the receiver needs to know the phase of the carrier signal to correctly extract the binary data. Therefore, the BPSK demodulator is a coherent receiver.

On the other hand, in BFSK demodulation, the receiver does not require knowledge of the carrier signal's phase. It only needs to detect the frequency changes to extract the binary data. Therefore, the BFSK demodulator is a non-coherent receiver.

In summary, the block diagram for a BPSK demodulator includes an input signal block, carrier signal generator block, multiplication block, phase detector block, and output signal block. The BFSK demodulator has a similar block diagram but with a different carrier signal frequency. The BPSK demodulator is a coherent receiver, while the BFSK demodulator is a non-coherent receiver.

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