Method and apparatus for iterative timing and carrier recovery

a receiver and carrier technology, applied in the direction of synchronisation signal speed/phase control, pulse technique, synchronisation arrangement, etc., can solve the problems of large number of errors, non-data-aided approach, and additional self-nois
US20120039380A1Inactive Publication Date: 2012-02-16THOMSON LICENSING SA
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
THOMSON LICENSING SA
Publication Date
2012-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

Method and apparatus for iterative timing recovery for FTN signaling are provided. The iterative timing recovery method and apparatus uses a feedback timing error signal from a forward error correction block with an additional equalizer prior to a maximum a posteriori (MAP) decoder which matches the equalized FTN signal to a truncated inter-symbol interference (ISI) target. A timing error is then generated using a modified M&M timing error detector.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Application Ser. No. 61 / 217,333, entitled “SYSTEM AND METHODS FOR SATELLITE SYSTEMS,” filed May 29, 2009 which is incorporated by reference herein in its entirety.FIELD OF THE INVENTION

[0002] The present principles relate to iterative timing recovery in receivers systems.BACKGROUND OF THE INVENTION

[0003] Carrier recovery schemes can be classified into two structures: feed-forward structure and feedback structure.

[0004] The feedback carrier recovery uses a digital Phase Locked Loop (PLL) to track out the carrier phase and frequency offset. However, it relies on a decision directed or non-data-aided approach to estimate the phase error at each time instant. In decision-directed approach, the decision errors will cause additional self noise while the non-data-aided approach can only apply to a limited number of multiple phase shift keying (MPSK) formats. Further, the feedback carrier recov...

Claims

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