Abstract: Techniques are disclosed to enable relative performance measurement of a cyclist by way of an electronic device for use in connection with a bicycle. The electronic device determines and communicates an exertion level and a corresponding actual performance metric achieved by a cyclist based on movement characteristics of the bicycle and whether the cyclist's shoes are clipped into pedals on the bicycle. The device uses sensors for determining the movement characteristics of the bicycle in connection with a memory element and a processing element. The processing element ascertains a pedal clip status event based on the movement characteristics of the bicycle, and the device displays information about the exertion level of the cyclist as correlated with the actual bicycle performance metrics.

Abstract: A method and apparatus for determining a bicyclist's bodily position, such as sitting or standing, while riding a bicycle. Sensors measure a force applied by the bicyclist to the pedals. The measurement data is analyzed to identify a feature, such as whether a radial force is higher or lower than a tangential force or whether a total vertical force is high or low, which is indicative of the bicyclist's bodily position. A series of changes in the bicyclist's bodily position during the ride is recorded. A series of changes in the geographic location of the bicyclist and/or a series of changes in one or more performance metrics while riding the bicycle may also be recorded. The series of changes in the bicyclist's bodily position, the geographic location, and the performance metrics may be correlated, graphically communicated in real-time or post-ride, and used to improve the bicyclist's performance.

Abstract: A method and apparatus for determining a power phase and other force-related performance of a bicyclist while riding a bicycle. Sensors measure a force applied by the bicyclist to the left and right pedals. The measurement data is analyzed to determine the power phase performance by correlating the force applied by the bicyclist to the left and right pedals with corresponding angles of the left and right cranks. A series of changes in the power phase performance during the ride is recorded. A series of changes in the geographic location of the bicyclist and/or a series of changes in one or more performance metrics while riding the bicycle may also be recorded. The series of changes in the bicyclist's power phase performance, the geographic location, and the performance metrics may be correlated, graphically communicated in real-time or post-ride, and used to improve the bicyclist's performance.

Abstract: A method and apparatus for determining a bicyclist's bodily position, such as sitting or standing, while riding a bicycle. Sensors measure a force applied by the bicyclist to the pedals. The measurement data is analyzed to identify a feature, such as whether a radial force is higher or lower than a tangential force or whether a total vertical force is high or low, which is indicative of the bicyclist's bodily position. A series of changes in the bicyclist's bodily position during the ride is recorded. A series of changes in the geographic location of the bicyclist and/or a series of changes in one or more performance metrics while riding the bicycle may also be recorded. The series of changes in the bicyclist's bodily position, the geographic location, and the performance metrics may be correlated, graphically communicated in real-time or post-ride, and used to improve the bicyclist's performance.

Abstract: A heart rate monitor (HRM) includes an electrostatic discharge protective layer configured to at least partially shield the heart rate monitor from electrostatic discharge (ESD). The heart rate monitor includes a strap configured to be worn on the body of a user that includes signal and ground electrodes. The signal electrode is configured to receive electrical impulses from the heart of the user, while the ground electrode is configured to electrically ground the heart rate monitor to the body of the user. An electrostatic discharge protective layer is disposed on or in the strap over the signal electrode so that the signal electrode is at least substantially positioned between the body of the user and the electrostatic discharge protective layer when the strap is worn. The electrostatic discharge protective layer is electrically coupled to the ground electrode to at least partially shield the signal electrode from electrostatic discharge.

Abstract: A radio receiver's digital matched filter (52') is intended to match a pulse-shaping filter (23) in the transmitter whose signals it receives. However, the clock signal on which the matched filter's timing is based is generated by a receiver clock (58') that is independent of the transmitter clock (56) and that is subjected to no timing adjustment to bring the two clock signals into synchronism. So as to ensure that the matched and pulse-shaping filters work together as a Nyquist filter, therefore, a timing-recovery circuit (60') senses the timing offset in the matched filter's output, and a coefficient generator (80) adjusts the matched filter's coefficients in such a manner that the filter itself imposes the delay needed for the required timing relationship between the filters.