Patents by Inventor Jesse Stone
Jesse Stone has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8549970Abstract: A power saw assembly including a base plate and having a powered blade assembly including a saw blade attached to the upper surface of the base plate. The powered blade assembly has at least one operating position for cutting material wherein the saw blade extends at least partially through a slot in said base plate. The power saw assembly further includes a fence assembly swivelable about a substantially vertical axis from a first position allowing the saw blade to cut through a piece of material at an angle of 90 degrees with respect to the length of the material, to other positions allowing the saw blade to cut through the material at angles other than 90 degrees with respect to the length of the material. The fence assembly is securable to the base plate at any position by clamping the fence assembly against the upper and lower surfaces of the base plate.Type: GrantFiled: May 24, 2007Date of Patent: October 8, 2013Inventor: Donald Jesse Stone
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Patent number: 7680223Abstract: A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.Type: GrantFiled: December 21, 2007Date of Patent: March 16, 2010Assignee: SirF Technology, Inc.Inventors: Julien Basch, Andrew Chou, Robert Lorenz, Jesse Stone
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Publication number: 20080098056Abstract: A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.Type: ApplicationFiled: December 21, 2007Publication date: April 24, 2008Inventors: Julien Basch, Andrew Chou, Robert Lorenz, Jesse Stone
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Patent number: 7313207Abstract: A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.Type: GrantFiled: January 26, 2004Date of Patent: December 25, 2007Assignee: SiRF Technology, Inc.Inventors: Julien Basch, Andrew Chou, Robert Lorenz, Jesse Stone
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Patent number: 7102567Abstract: A method and a system for a location determination (a) acquire a first positioning signal; (b) analyze the first positioning signal to provide an estimate of a clock signal acceleration; (c) acquire additional positioning signals based on the estimate of the clock signal acceleration; and (d) perform the location determination using the first positioning signal and the additional positioning signals. The additional positioning signals may be acquired using a stacking technique. The first positioning signal may be acquired based on a signal-to-noise ratio exceeding a predetermined threshold. Clock signal acceleration may be estimated using a constant clock signal acceleration parametric model, which may be parabolic model based on a function that depends on the clock signal acceleration, a clock Doppler and an initial phase value.Type: GrantFiled: October 29, 2003Date of Patent: September 5, 2006Assignee: SiRF Technology, Inc.Inventor: Jesse Stone
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Patent number: 7030814Abstract: System and method to determine the location of a receiver in a multipath environment are provided. The received signal is correlated with the reference signals associated with the transmitting sources. Each correlation function is processed to derive various types of signal constraints, such as probability densities and uncertainty regions or intervals. In some embodiments, these constraints are for the code-phases and the Doppler frequencies. These signal constraints are transformed into constraints on the receiver variables and then fused together into a unified receiver constraint. A-priori constraints, such as constraints on the location of the receiver or the timestamp, may be incorporated into the unified receiver constraint. Some embodiments estimate a location based also on the estimated Doppler frequency. The constraints used by the invention are based on models of multipath effects and are geared towards mitigating these effects.Type: GrantFiled: September 6, 2002Date of Patent: April 18, 2006Assignee: SiRF Technology, Inc.Inventors: Jesse Stone, Stefano Casadei, Wallace Mann, Benjamin Van Roy
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Patent number: 7002514Abstract: A systematic method for acquiring positioning signals, such as global positioning system (GPS) signals, uses different signal detection algorithms at different stages of signal detection. For example, a method for detecting multiple positioning signals may include first detecting a first positioning signal using a robust but less sensitive signal detection method, such as non-coherent integration. Based on the signal parameter values that allow detection of the first positional signal, detecting a second positioning signal using a more sensitive method, such as coherent integration. In this manner, by capturing the strongest signal first using a robust method, signal detection parameter values common to positioning signals can be narrowed to allow subsequent signal acquisitions using a more sensitive—but computationally more intensive—method.Type: GrantFiled: January 15, 2004Date of Patent: February 21, 2006Assignee: SiRF Technology, Inc.Inventors: Julien Basch, Andrew Chou, Robert Lorenz, Jesse Stone
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Publication number: 20050093740Abstract: A method and a system for a location determination (a) acquire a first positioning signal; (b) analyze the first positioning signal to provide an estimate of a clock signal acceleration; (c) acquire additional positioning signals based on the estimate of the clock signal acceleration; and (d) perform the location determination using the first positioning signal and the additional positioning signals. The additional positioning signals may be acquired using a stacking technique. The first positioning signal may be acquired based on a signal-to-noise ratio exceeding a predetermined threshold. Clock signal acceleration may be estimated using a constant clock signal acceleration parametric model, which may be parabolic model based on a function that depends on the clock signal acceleration, a clock Doppler and an initial phase value.Type: ApplicationFiled: October 29, 2003Publication date: May 5, 2005Inventor: Jesse Stone
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Patent number: 6836241Abstract: A method in a Global Positioning System (GPS) receiver achieves enhanced performance by scheduling searches in the Doppler search space according to a cost function. The cost function relates to both the cost of building a 3-dimensional correlation grid and the cost of searching satellite, code phase, Doppler and integration time interval spaces for values that provide a maximum in the correlation grid. In one embodiment, after the clock Doppler is determined upon acquiring one satellite, the Doppler search range associated with a cell in the grid is dominated by the receiver's own motion. The scheduler schedules searching of the Doppler search space using search ranges determined empirically by the expected receiver velocity. In one embodiment, the scheduler increases integration times before changing Doppler search ranges, which require a recalculation of the grid.Type: GrantFiled: April 19, 2002Date of Patent: December 28, 2004Assignee: SiRF Technology, Inc.Inventors: Jesse Stone, Andrew Chou, Wallace Mann
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Publication number: 20040167713Abstract: A systematic method for acquiring positioning signals, such as global positioning system (GPS) signals, uses different signal detection algorithms at different stages of signal detection. For example, a method for detecting multiple positioning signals may include first detecting a first positioning signal using a robust but less sensitive signal detection method, such as non-coherent integration. Based on the signal parameter values that allow detection of the first positional signal, detecting a second positioning signal using a more sensitive method, such as coherent integration. In this manner, by capturing the strongest signal first using a robust method, signal detection parameter values common to positioning signals can be narrowed to allow subsequent signal acquisitions using a more sensitive—but computationally more intensive—method.Type: ApplicationFiled: January 15, 2004Publication date: August 26, 2004Inventors: Julien Basch, Andrew Chou, Robert Lorenz, Jesse Stone
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Publication number: 20040158593Abstract: A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.Type: ApplicationFiled: January 26, 2004Publication date: August 12, 2004Inventors: Julien Basch, Andrew Chou, Robert Lorenz, Jesse Stone
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Patent number: 6757610Abstract: A method for providing an initial estimate for an interval of possible values for a parameter used in an acquisition of a signal maintains parameter values obtained from previous signal acquisitions and the times at which the signal acquisitions were made. The maintained values of the parameter are used to derive a candidate value for the parameter to be used in a new signal acquisition. To make the maintained values available even after a brief period during which the GPS receiver is powered down, the maintained values can be stored in a non-volatile memory. The signal acquisitions may correspond to GPS satellite signal acquisitions, and the maintained parameter values can be grouped according to whether a successful receiver location determination was accomplished.Type: GrantFiled: February 4, 2002Date of Patent: June 29, 2004Assignee: SiRF Technology, Inc.Inventors: Wallace Mann, Jesse Stone
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Publication number: 20040008139Abstract: System and method to determine the location of a receiver in a multipath environment are provided. The received signal is correlated with the reference signals associated with the transmitting sources. Each correlation function is processed to derive various types of signal constraints, such as probability densities and uncertainty regions or intervals. In some embodiments, these constraints are for the code-phases and the Doppler frequencies. These signal constraints are transformed into constraints on the receiver variables and then fused together into a unified receiver constraint. A-priori constraints, such as constraints on the location of the receiver or the timestamp, may be incorporated into the unified receiver constraint. Some embodiments estimate a location based also on the estimated Doppler frequency. The constraints used by the invention are based on models of multipath effects and are geared towards mitigating these effects.Type: ApplicationFiled: September 6, 2002Publication date: January 15, 2004Inventors: Jesse Stone, Stefano Casadei, Wallace Mann, Benjamin Van Roy
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Publication number: 20030197641Abstract: A method in a Global Positioning System (GPS) receiver achieves enhanced performance by scheduling searches in the Doppler search space according to a cost function. The cost function relates to both the cost of building a 3-dimensional correlation grid and the cost of searching satellite, code phase, Doppler and integration time interval spaces for values that provide a maximum in the correlation grid. In one embodiment, after the clock Doppler is determined upon acquiring one satellite, the Doppler search range associated with a cell in the grid is dominated by the receiver's own motion. The scheduler schedules searching of the Doppler search space using search ranges determined empirically by the expected receiver velocity. In one embodiment, the scheduler increases integration times before changing Doppler search ranges, which require a recalculation of the grid.Type: ApplicationFiled: April 19, 2002Publication date: October 23, 2003Applicant: Enuvis, Inc.Inventors: Jesse Stone, Andrew Chou, Wallace Mann