Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2005-05-11
2009-02-24
Issing, Gregory C (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C375S150000, C708S313000
Reexamination Certificate
active
07495610
ABSTRACT:
A system and method for sampling signal in a Global Positioning System (GPS) receiver or Code Division Multiple Access (CDMA) communication device are provided. In general, decimation circuitry is provided. The decimation circuitry includes filtering circuitry that performs a number of integrations of an input signal for each code chip, where each the number of integrations has a different start time but has a common integration period equal to the duration of a code chip. Each of the integrations provides an output sample of the input signal for one of a corresponding number of chip-phases. The output samples for the chip-phases are provided to processing circuitry for numerous code chips. The processing circuitry processes the output samples corresponding to a select one of the chip-phases such that the sampling rate of the digital signal is reduced.
REFERENCES:
patent: 5079734 (1992-01-01), Riley
patent: 5455782 (1995-10-01), Young et al.
patent: 2002/0025006 (2002-02-01), Mehrnia et al.
patent: 2006/0056497 (2006-03-01), Lennen
Keegan Richard
Norman Charles
Issing Gregory C
RF Micro Devices, Inc.
Withrow & Terranova, P.L.L.C.
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