Phase dithered digital communications system

Details Phase dithered digital communications system Phase dithered digital communications system

2007-04-27

2011-11-29

Payne, David C. (Department: 2611)

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

C327S141000, C375S354000

Reexamination Certificate

active

08068573

ABSTRACT:
The present invention is a phase dithered digital communications system that includes a digital receiver, and uses phase dithering to spread the energy of one or more system clocks to minimize receiver de-sensitization. Phase dithering uses a single frequency for each system clock; however, the energy of each system clock is spread over a range of frequencies by changing the duty-cycle of each clock half-cycle. A non-phase dithered clock drives the sampling clock of a receiver analog-to-digital converter to provide accurate correlation with received information, which may allow use of a higher frequency sampling clock than in frequency dithered designs. Phase dithered clocks and non-phase dithered clocks may have constant frequencies that are related to each other by a ratio of two integers; therefore, the time base used for extracting received data is always correlated and accurate.

REFERENCES:
patent: 4545072 (1985-10-01), Skutta et al.
patent: 4896318 (1990-01-01), Kokubo et al.
patent: 5019786 (1991-05-01), Fairley et al.
patent: 5226058 (1993-07-01), Anderson et al.
patent: 5263055 (1993-11-01), Cahill
patent: 5335363 (1994-08-01), Basciano
patent: 5745848 (1998-04-01), Robin
patent: 5781849 (1998-07-01), Carlsson et al.
patent: 5812590 (1998-09-01), Black et al.
patent: 5926514 (1999-07-01), Meador et al.
patent: 6345175 (2002-02-01), Murakami
patent: 6567654 (2003-05-01), Coronel Arredondo et al.
patent: 6898420 (2005-05-01), Black et al.
patent: 2002/0193140 (2002-12-01), Behrens et al.
patent: 2003/0107432 (2003-06-01), Huynh
patent: 2005/0219628 (2005-10-01), Yasutomi et al.
patent: 2006/0017486 (2006-01-01), Iler
patent: 2006/0214714 (2006-09-01), Kim et al.
patent: 2007/0127608 (2007-06-01), Scheim et al.
patent: 2007/0216457 (2007-09-01), Agarwal et al.
patent: 2008/0057967 (2008-03-01), Goldsmith
patent: 2008/0146281 (2008-06-01), Cohen et al.
patent: 2009/0304112 (2009-12-01), Lomas et al.
patent: 2010/0127789 (2010-05-01), Kenly et al.
patent: WO 2007118062 (2007-10-01), None

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