Abstract
For non-data-aided carrier phase recovery of M-PSK modulated signals, Viterbi and Viterbi suggested a feedforward estimator based on a modification of the Mth power nonlinearity. With respect to the jitter variance, they presented a closed-form solution for even integer values of the generic design parameter /spl mu/, 0/spl les//spl mu//spl les/M-2. It is shown that their analysis can be simplified considerably as well as extended to any real value of /spl mu/>-M-2. Furthermore, it is verified that the Cramer-Rao lower bound, as the theoretical limit, is solely approached for larger values of the signal-to-noise ratio and negligible carrier frequency offsets. Finally, to minimise the jitter performance, the closed-form solution is used for optimisation of the design parameter.
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