1F M Gardner, A BPSK/QPSK timing-error detector for sampled Receivers [ J ]. IEEE Trans Commun, 1986,com-34 (5) : 423 - 429.
2F M Gardner. Interpolation in digital modems-part I: fundamentals [ J ]. IEEE Trans Commun, 1993, com-41 ( 3 ) :501 - 507.
3L Erup , F M Gardner and R A Harris. Intrepolation in digital mmodems-part Ⅱ: implementation and performance[J ]. IEEE Trans Commun, 1993, com-41 ( 3 ) : 9981008.
4Charles R cahn , Improved frequency acquisition of a costas loop [ J ]. IEEE Trans on Commun. 1997, com-25(12) : 1453 - 1459.