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  EFFECT OF FREQUENCY OFFSET ON CARRIER PHASE AND SYMBOL TIMING RECOVERY IN DIGITAL RECEIVERS

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by Ridha Hamila, Jussi Vesma, Hannu Vuolle, Markku Renfors
http://www.cs.tut.fi/~v150249/issse_98.ps
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Abstract:

Recently, a new all-digital technique for clock and carrier phase synchronization of digital receivers was introduced by the authors. This technique is based on a polynomial approximation of the likelihood function and utilizes the Farrow structure for symbol interpolation. In this contribution, we analyze the effect of frequency offset or Doppler shift on the performance of the receiver while adjusting jointly the symbol timing and the carrier phase. Simulation results for the data-aided synchronization principle using two types of interpolators are provided and compared with the theoretical case. We notice that our optimized interpolator performs clearly better compared to the traditional Lagrange interpolator.

Citations

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19 Interpolation in digital modems – part II: implementation and performance – Erup, Gardner, et al. - 1993
8 Interpolation filters with arbitrary frequency response for all-digital receivers – Vesma, Saramäki - 1996
4 Demodulator Reference Recovery Techniques Suited for – Gardner - 1988
3 Discretetime simulation of continuous-time systems using generalized interpolation techniques – Hamila, Vesma, et al. - 1997
2 Maximum Likelihood Feedforward Symbol Timing Recovery Based on Efficient Digital Interpolation Techniques – Vesma, Tuukkanen, et al. - 1996
2 Block-Based Feedforward MaximumLikelihood Symbol Timing Recovery Technique – Vesma, Tuukkanen, et al. - 1998
1 Renfors , "Joint estimation of phase and timing using polynomial-based maximum likelihood technique – Hamila, Vesma, et al.
1 Comparison of efficient interpolation techniques for symbol timing recovery – Vesma, Renfors, et al. - 1996
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