Abstract: A method of compressing data output from one or more accelerometers configured to be transported, carried or worn by a user is provided. Acceleration values indicative of the movement of the user are measured at a first frequency and values representative of the measured acceleration values are generated at a second frequency, which is lower than the first frequency. The step of generating comprises: defining a plurality of time windows, each time window containing a plurality of measured acceleration values; and applying a transformation to the measured acceleration values within each time window to generate a plurality of transformed values. For each time window, storing at least one of said plurality of transformed values and/or one or more parameters associated therewith.

Abstract: A navigation device includes a global navigation satellite system (GNSS) receiver for receiving GNSS signals broadcast by satellites of a GNSS, a receiver for receiving location information input by a user, time information and/or wireless network coverage information and a processing device. In at least one embodiment, the processing device is arranged to determine a seed position from the location information input by a user; time information and/or wireless network coverage information and controls the GNSS receiver to acquire GNSS satellites based on the determined seed position.

Abstract: A mobile communication device with positioning capability is provided, including: a global navigation satellite system (GNSS) receiver; a communication circuit for generating a control signal; an oscillator shared between the communication circuit and the GNSS receiver, for providing a clock signal having a frequency value corresponding to the control signal; and a decision unit, coupled to the communication circuit and the GNSS receiver, for recording the control signal; wherein the GNSS receiver obtains the frequency value of the clock signal according to the control signal recorded in the decision unit.

Abstract: A method of compressing data output from an acceleration measurement means configured to be transported, carried or worn by a user is provided. Acceleration values indicative of the movement of the user are measured at a first frequency and values representative of the measured acceleration values are generated at a second frequency, which is lower than the first frequency. The step of generating comprises: defining a plurality of time windows, each time window containing a plurality of measured acceleration values; and applying a transformation to the measured acceleration values within each time window to generate a plurality of transformed values. For each time window, storing at least one of said plurality of transformed values and/or one or more parameters associated therewith.

Abstract: A system is provided that is configured to be transported, carried or worn by a user, such as a portable personal training device or sports watch. The system comprises a global navigation satellite system (GNSS) receiver arranged to obtain the location and/or speed of the user and a pedometer for counting steps made by the user. Data from the GNSS receiver is used to calibrate the pedometer each time the user is determined to travel a distance greater than a predefined distance value during a period of time in which signals obtained by the GNSS receiver meet the one or more accuracy and/or reliability criteria.

Abstract: A system is provided that is configured to be transported, carried or worn by a user, such as a portable personal training device or sports watch. The system comprises means for determining the location of the user at a plurality of times during a journey from a first location to a second location, such as a GPS receiver. The system further comprises means for determining a motion state of the user at a plurality of times during the journey. The means can include an accelerometer, and can also utilise data obtained from a GPS receiver. The system further comprises means for determining the distance travelled by the user during at least a portion of the journey using the plurality of determined locations and the plurality of determined motion states, such that the system functions as an odometer.

Abstract: A navigation device includes a global navigation satellite system (GNSS) receiver for receiving GNSS signals broadcast by satellites of a GNSS, a receiver for receiving location information input by a user, time information and/or wireless network coverage information and a processing device. In at least one embodiment, the processing device is arranged to determine a seed position from the location information input by a user; time information and/or wireless network coverage information and controls the GNSS receiver to acquire GNSS satellites based on the determined seed position.

Abstract: A hybrid Global Positioning System (GPS) receiving method, and associated GPS receiving apparatus is provided. The GPS receiving apparatus includes an RF front-end circuit, a correlation circuit, an acquisition engine and a bidirectional interface control unit. The RF front-end receiving circuit receives a satellite signal and converts the same into a baseband signal. The acquisition engine, coupled to the correlation circuit, determines reception power of the GPS satellite signal. The interface control unit, coupled to the acquisition engine, provides a low-speed interface for transmitting GPS intermediate data that includes a code bin, a frequency bin, navigation data, a local system time and a GPS time. The interface control unit includes a memory interface unit for coupling to a memory.

Abstract: A hybrid Global Positioning System (GPS) receiving method, and associated GPS receiving apparatus is provided. The GPS receiving apparatus includes an RF front-end circuit, a correlation circuit, an acquisition engine and a bidirectional interface control unit. The RF front-end receiving circuit receives a satellite signal and converts the same into a baseband signal. The acquisition engine, coupled to the correlation circuit, determines reception power of the GPS satellite signal. The interface control unit, coupled to the acquisition engine, provides a low-speed interface for transmitting GPS intermediate data that includes a code bin, a frequency bin, navigation data, a local system time and a GPS time. The interface control unit includes a memory interface unit for coupling to a memory.

Abstract: A mobile communication device with positioning capability is provided, including: a global navigation satellite system (GNSS) receiver; a communication circuit for generating a control signal; an oscillator shared between the communication circuit and the GNSS receiver, for providing a clock signal having a frequency value corresponding to the control signal; and a decision unit, coupled to the communication circuit and the GNSS receiver, for recording the control signal; wherein the GNSS receiver obtains the frequency value of the clock signal according to the control signal recorded in the decision unit.