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- W2074148302 abstract "We investigate the differences between allowable differential encoding strategies and their associated bit-error probability performances for quadrature phase-shift keying (QPSK) and offset QPSK modulations when the carrier demodulation reference signals are supplied by the optimum (motivated by maximum a posteriori estimation of carrier phase) carrier-tracking loop suitable for that modulation. In particular, we show that in the presence of carrier-synchronization phase ambiguity but an otherwise ideal loop, both the symbol and bit-error probabilities in the presence of differential encoding are identical for the two modulations. On the other hand, when in addition the phase error introduced by the loop's finite signal-to-noise ratio is taken into account, it is shown that the two differentially encoded modulations behave differently, and their performances are no longer equivalent. A similar statement has previously been demonstrated for the same modulations when the phase ambiguity was assumed to have been perfectly resolved by means other than differential encoding." @default.
- W2074148302 created "2016-06-24" @default.
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- W2074148302 date "2006-05-01" @default.
- W2074148302 modified "2023-10-02" @default.
- W2074148302 title "On the bit-error probability of differentially encoded QPSK and offset QPSK in the presence of carrier synchronization" @default.
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- W2074148302 doi "https://doi.org/10.1109/tcomm.2006.874002" @default.
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