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In which system, bit stream is portioned into even and odd stream?

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In which system, bit stream is portioned into even and odd stream?

(a) BPSK

(b) MSK

(c) QPSK

(d) FSK

I got this question during an interview.

My question comes from M-ary Signalling and Performance in division Bandpass Modulation and Detection of Digital Communications

1 Answer

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Best answer
Correct option is (c) QPSK

The best explanation: In QPSK bit stream is portioned into even and odd stream, I and Q bit streams. Each new stream modulates as orthogonal component at half bit rate.

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