QPSK stands for Quadrature Phase Shift Keying; how many bits are transmitted per symbol?

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Multiple Choice

QPSK stands for Quadrature Phase Shift Keying; how many bits are transmitted per symbol?

Explanation:
QPSK encodes two bits per symbol because it uses four distinct phase states. Each symbol corresponds to one of four equally spaced phase angles, so there are four possible symbol values. The number of bits per symbol is log2 of the number of symbols, which is log2(4) = 2. The term “quadrature” means the signal has two orthogonal components, I and Q, that together create those four combinations (00, 01, 10, 11). So, each symbol transmits two bits.

QPSK encodes two bits per symbol because it uses four distinct phase states. Each symbol corresponds to one of four equally spaced phase angles, so there are four possible symbol values. The number of bits per symbol is log2 of the number of symbols, which is log2(4) = 2. The term “quadrature” means the signal has two orthogonal components, I and Q, that together create those four combinations (00, 01, 10, 11). So, each symbol transmits two bits.

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