The bit rate always equal the baud rate in which type of signal?Group of answer choices8PSKAll of the choicesBPSKQPSK

Breakdown the Problem

1. Identify what bit rate and baud rate mean: bit rate refers to the number of bits transmitted per second, while baud rate refers to the number of signal changes or symbols transmitted per second.
2. Analyze the modulation techniques given: BPSK, QPSK, and 8PSK.

Relevant Concepts

1. BPSK (Binary Phase Shift Keying): Each symbol represents 1 bit. Therefore, bit rate = baud rate.
2. QPSK (Quadrature Phase Shift Keying): Each symbol represents 2 bits. Therefore, bit rate is double the baud rate.
3. 8PSK (8 Phase Shift Keying): Each symbol represents 3 bits. Therefore, bit rate is triple the baud rate.

Analysis and Detail

1. In BPSK, since only 1 bit is represented per symbol, the bit rate equals the baud rate.
2. In QPSK, as each symbol encodes 2 bits, the relationship is bit rate = 2 × baud rate.
3. In 8PSK, each symbol transmits 3 bits, leading to a bit rate = 3 × baud rate.

Verify and Summarize

• BPSK is the only modulation scheme where bit rate is equal to the baud rate.
• QPSK and 8PSK have higher bit rates compared to their baud rates.

Final Answer

The answer is BPSK.