文件名称:carrier-synxronization-OQPSK
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This article contains analyses of the performance of various carrier synchronization
loops for offset quadrature phase-shift-keying (OQPSK) modulation, all
motivated in one form or another by the maximum a posteriori (MAP) estimation
of carrier phase. When they are implemented as either high or low signal-to-noise
ratio (SNR) approximations to the generic implementation suggested by the MAP
estimation of carrier phase for an OQPSK signal, it is shown that the loops behave
more like biphase than quadriphase loops in that they only exhibit a 180-deg phase
ambiguity rather than the 90-deg phase ambiguity typical of the latter.
loops for offset quadrature phase-shift-keying (OQPSK) modulation, all
motivated in one form or another by the maximum a posteriori (MAP) estimation
of carrier phase. When they are implemented as either high or low signal-to-noise
ratio (SNR) approximations to the generic implementation suggested by the MAP
estimation of carrier phase for an OQPSK signal, it is shown that the loops behave
more like biphase than quadriphase loops in that they only exhibit a 180-deg phase
ambiguity rather than the 90-deg phase ambiguity typical of the latter.
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carrier synxronization OQPSK.pdf