Abstract: A heartbeat rate monitor that uses a sensor to detect a person's heartbeats and circuitry for providing pulses indicative of these heartbeats. A transmitter wirelessly transmits these pulses, along with an identification (ID) signal, to a receiver. The ID signal identifies the transmitter and can be pulses providing a code. In the receiver, a circuit uses the ID signal to determine if the received pulses are from the transmitter. If they are from the transmitter, the pulses representing heartbeats are used to calculate hearbeat rate. Any received signal from a source other than the transmitter is rejected in the receiver. If there is transmission interference, the monitor can calculate an approximate heartbeat rate. The frequency over which wireless transmission occurs can be changed by the person, or automatically by the monitor.

Abstract: A monitor-exercise equipment apparatus for measuring a biomedical response such as heartbeat rate, and for using the measured response to control the exercise equipment, where the monitor includes a transmitting unit and a receiving unit located in the exercise equipment. The monitor detects a biomedical response (heart rate) and produces a digital pulse train representing this response. The digital pulse train is then encoded to produce an encoded digital signal having a first identification part identifying the transmitting unit and a second data part representing the person's biomedical response. This encoded digital signal is wirelessly sent to the receiving unit which reads the received signal to determine if it is from the transmitting unit. If it is from that transmitting unit, the data part is read. If there are too many errors in the data part, a new frequency of wireless transmission is used in the monitor.

Abstract: A personal monitor for monitoring a biomedical condition, such as a heart rate. A sensor provides a signal related to the biomedical condition and the signal is encoded for repeated wireless transmission to a receiver. An encoded identification signal is also repeatedly sent to the receiver to identify the transmitter to the receiver in order to prevent the adverse effects of interference which occurs if signals other than those from the transmitter are received. The monitor detects deviations (errors) from an expected pattern and recovers from these deviations (error correction) to display an accurate value of the biomedical condition. If too many errors are present due to interference, faulty transmission and/or reception, etc., the frequency over which wireless transmission occurs can be changed. In one embodiment, the value of the biomedical condition is wirelessly sent to the receiver.