Early-late synchronizer having reduced timing jitter
A device for maintaining fine alignment between an incoming spread spectrum signal and a locally generated code in a digital communication receiver comprises: - a delay line for storing a plurality of consecutive samples of the incoming spread spectrum signal; - three digitally controlled interpolat...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A device for maintaining fine alignment between an incoming spread spectrum signal and a locally generated code in a digital communication receiver comprises: - a delay line for storing a plurality of consecutive samples of the incoming spread spectrum signal; - three digitally controlled interpolators for determining by interpolation between consecutive samples an interpolated early sample (e), an interpolated middle sample (m) and an interpolated late sample ; - two correlators for calculating an error signal (xi) as the difference between the energy of the symbols computed from the interpolated early (e) and late samples; - a circuit for generating a control signal (S OUT |
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