Carrier synchronization unit and synchronization method

Details Carrier synchronization unit and synchronization method Carrier synchronization unit and synchronization method

1996-09-12

1998-08-25

Vo, Don N.

Pulse or digital communications

Receivers

Interference or noise reduction

375354, 36472417, H04B 110

Patent

active

057990476

ABSTRACT:
The carrier synchronization unit combines the recursive least square (RLS) type phase and amplitude estimation and the prediction in a decision-directed carrier synchronization strategy. The fading channel multiplicative distortion is estimated using an adaptive recursive least square method which minimizes a time-weighted square error. Combining prediction based on a least-square fading memory curve fit and extrapolation with RLS estimation the tracking delay effect is reduced. Resulting in an improvement of receiver performance. The proposed method minimizes the phenomenon of hang-up allowing rapid phase acquisition with high probability of success.

REFERENCES:
patent: 4899367 (1990-02-01), Sampei
patent: 4947409 (1990-08-01), Raith et al.
patent: 5513215 (1996-04-01), Marchetto et al.
patent: 5596608 (1997-01-01), Sassa et al.

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