Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Reexamination Certificate
2006-02-21
2006-02-21
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
C342S357490, C342S357490, C375S130000, C375S140000, C375S147000, C375S150000, C455S403000, C455S422100, C455S456100
Reexamination Certificate
active
07002516
ABSTRACT:
A wireless communication device (e.g., a cellular telephone) includes one transceiver for voice or data communication and a global positioning system (GPS) receiver a signal for receiving a GPS signal from the GPS satellites. The GPS receiver does not receive the GPS signal when the transceiver is transmitting, so that the GPS signal receives may consist of multiple signal segments of various duration and various delays. A method is provided which combine correlations of these multiple signal segments cumulatively until a sufficiently signal-to-noise ratio is achieved to allow detection of the transmitted signal of one or more of the GPS satellites.
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D.J.R. Van Nee and A.J.R.M. Coenen “New Fast GPS Code-Acquisition Technique Using FFT,” Jan. 17, 1991, Electronic Letters, vol. 27, No. 2 pp. 158-160.
Gregory Bernarr E.
Kwok Edward C.
MacPherson Kwok & Chen & Heid LLP
SiRF Technology Inc.
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