DocumentCode :
748568
Title :
Inherent limitations in data-aided time synchronization of continuous phase-modulation signals over time-selective fading channels
Author :
Dabora, Ron ; Goldberg, Jason ; Messer, Hagit
Author_Institution :
Dept. of Electr. Eng.-Syst., Tel Aviv Univ., Israel
Volume :
50
Issue :
6
fYear :
2002
fDate :
6/1/2002 12:00:00 AM
Firstpage :
1470
Lastpage :
1482
Abstract :
Time synchronization of continuous phase modulation (CPM) signals over time selective, Rayleigh fading channels is considered. The Cramer-Rao lower bound (CRLB) for this problem is studied for data-aided (DA) synchronization (i.e., known symbol sequence transmission) over a time-selective Rayleigh fading (i.e., Gaussian multiplicative noise) channel. Exact expressions for the bound are derived as well as simplified, approximate forms that enable derivation of a number of properties that describe the bound´s dependence on key parameters such as signal-to-noise ratio (SNR), channel correlation, sampling rate, sequence length, and sequence choice. Comparison with the well-known slow fading (i.e., constant) channel bound is emphasized. Further simplifications are obtained for the special case of minimum phase keying (MSK), wherein it is shown how the bound may be used as a sequence design tool to optimize synchronization performance
Keywords :
Gaussian channels; Gaussian noise; Rayleigh channels; continuous phase modulation; correlation methods; minimum shift keying; sequences; synchronisation; Cramer-Rao lower bound; Gaussian multiplicative noise channel; MSK; Rayleigh fading channels; SNR; channel correlation; continuous phase-modulation signals; data-aided synchronization; digital modulation; fading statistics; minimum phase keying; sampling rate; sequence design tool; sequence length; signal-to-noise ratio; slow fading channel bound; symbol sequence transmission; synchronization performance optimization; time-selective fading channels; AWGN; Additive white noise; Continuous phase modulation; Digital modulation; Fading; Gaussian noise; Phase modulation; Rayleigh channels; Sampling methods; Signal to noise ratio;
fLanguage :
English
Journal_Title :
Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1053-587X
Type :
jour
DOI :
10.1109/TSP.2002.1003070
Filename :
1003070
Link To Document :
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