Symbol synchronizing device

Details Symbol synchronizing device Symbol synchronizing device

2007-12-18

2007-12-18

Tran, Khai (Department: 2611)

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

C375S354000

Reexamination Certificate

active

10991069

ABSTRACT:
A symbol synchronization device that enables effective symbol synchronization establishment and synchronization holding for an arbitrary spread code sequence. The device includes (i) a primary demodulation section for receiving a spread modulation signal where chips for symbol synchronization are added to a symbol data after spread modulation, and demodulating the spread modulation signal to a base band spread modulation signal, (ii) symbol synchronization chip removal means for removing chips for symbol synchronization from the base band spread modulation signal, (iii) a secondary demodulation section for despreading the base band spread modulation signal from which the chips for symbol synchronization are removed, (iv) a symbol timing regeneration section for regenerating a symbol timing by performing in-phase addition of the base band spread modulation signals; and (v) a symbol decision section for deciding the symbols for the despread signals that are output from the secondary demodulation section, synchronizing with the symbol timing.

REFERENCES:
patent: 5610946 (1997-03-01), Tanaka et al.
patent: 2005/0125176 (2005-06-01), Makhlouf et al.
patent: 2002-141112 (2003-11-01), None

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