47results about How to "Reduce and eliminate error" patented technology

A method and system for detecting drift in calibrated tracking systems used to locate features with respect to one or more coordinate systems allows medical devices to be accurately tracked within a reference coordinate system, and facilitates detection and compensation for changes in the orientation of the tracking system with respect to the coordinate system over time.

A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content.

An artifact signal correction system may include a mixing component to generate a waveform corresponding to an artifact such as an error tone, whereupon that waveform may be combined with the input waveform to substantially eliminate the artifact. In preferred embodiments, a method and apparatus for reducing spurious tones in systems of mismatched interleaved digitizers due to interleave error is provided. In various embodiments the method may include reversing the frequency content of an input signal, converting the reversed signal into interleave artifact content, delaying the input signal along a parallel path, and then subtracting the interleave content from the delayed input signal.

An automated traffic control process and system providing automatic remote monitoring the locations of one or more remote vehicles, determining which vehicles fall within one or more preference categories, and if a vehicle in a particular preference category is detected as approaching a remote intersection, issuing a preemption instruction to a traffic signal controller for the remote intersection. Various other process and system features can include one or more among: monitoring numerous vehicles and intersections, vehicle location monitoring, categorization, and issuance of preemption instructions on a centralized computing system; safety or other condition assessment and control of issuance of signaling instructions accordingly; determination of whether one or more the traffic intersection signaling controller should be operating according to one among differing hierarchical condition categories, and issuance of instructions causing remote traffic signaling to lock in a particular state, such as, for example in a right of way state.

A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content.