Apparatus for and method of making pulse-shape measurements

Details Apparatus for and method of making pulse-shape measurements Apparatus for and method of making pulse-shape measurements

2004-04-13

2010-06-15

Payne, David C (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C342S357490

Reexamination Certificate

active

07738536

ABSTRACT:
A receiver includes a pre-correlation filter that forms an image of the average chip shape of a received signal over a specified period of time. The filter includes an array of complex accumulation registers that accumulate measurements that are associated with signal samples from specific ranges of locations, or code chip phase angles, along a spread-spectrum chip. Using the accumulated measurements, the receiver estimates the location of the chip transitions in a direct path signal component. The receiver may thereafter change the starting point, size and number of ranges, such that the accumulation registers accumulate more detail from the chip edges. The receiver in addition may compare the accumulated measurements with a reference pulse shape to determine if any interference is present in the received transmission that will distort ranging information calculated from the received signal.

REFERENCES:
patent: 4894842 (1990-01-01), Broekhoven et al.
patent: 5134407 (1992-07-01), Lorenz et al.
patent: 5390207 (1995-02-01), Fenton et al.
patent: 5402450 (1995-03-01), Lennen
patent: 5414729 (1995-05-01), Fenton
patent: 5630208 (1997-05-01), Enge et al.
patent: 5654980 (1997-08-01), Latva-aho et al.
patent: 5764686 (1998-06-01), Sanderford et al.
patent: 5963582 (1999-10-01), Stansell, Jr.
patent: 5990827 (1999-11-01), Fan et al.
patent: 6031881 (2000-02-01), Weill et al.
patent: 6195328 (2001-02-01), Tsui et al.
patent: 6236687 (2001-05-01), Caso et al.
patent: 6243409 (2001-06-01), Fenton et al.
patent: 6259401 (2001-07-01), Woo
patent: 6370207 (2002-04-01), Weill et al.
patent: 6466612 (2002-10-01), Kohli et al.
patent: 6493376 (2002-12-01), Harms et al.
patent: 6493378 (2002-12-01), Zhodzishsky et al.
patent: 6532251 (2003-03-01), King et al.
patent: 6636558 (2003-10-01), Schnaufer et al.
patent: 6658048 (2003-12-01), Valio
patent: 6751247 (2004-06-01), Zhengdi
patent: 6798758 (2004-09-01), Chun et al.
patent: 6868110 (2005-03-01), Phelts et al.
patent: 6912242 (2005-06-01), Farine et al.
patent: 6967992 (2005-11-01), Rabaeijs et al.
patent: 7042930 (2006-05-01), Dafesh
patent: 7298324 (2007-11-01), Manz
patent: 2002/0181632 (2002-12-01), Kang et al.
patent: 2003/0202569 (2003-10-01), Kim et al.
patent: 2004/0071200 (2004-04-01), Betz et al.
patent: 2004/0208236 (2004-10-01), Fenton
patent: 2005/0002447 (2005-01-01), Kohli et al.
patent: 2005/0025222 (2005-02-01), Underbrink et al.
patent: 2006/0018371 (2006-01-01), Medlock
patent: 2006/0095206 (2006-05-01), Garin et al.
patent: 0892277 (1999-01-01), None
patent: WO 97/06446 (1997-02-01), None
Lawrence R. Weill, Multipath Mitigation Using Moderized GPS Signals: How Good Can it Get?, Dept of Mathematics, California State University, Fullerton, pp. 493-505, ION GPS 2002, Sep. 24-27, 2002, Portland, OR.

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