Seiko Epson Corporation

Fumikazu Sano

Akifumi Hayashi

Kazuhiro Shibuya

Hiroki Yoshioka

Kazuhiko Tsuchimoto

Akihiro Shiratsuka

A portable electronic apparatus includes an operation section adapted to receive an operation of a user and output a rest start signal representing start of a rest, a body motion sensor adapted to output a body motion signal based on a motion of the user, a timing section adapted to measure rest time of the user, and a processor electrically connected to the operation section, the body motion sensor, and the timing section, and the processor starts the measurement of the rest time by the timing section in the case in which the processor fails to detect the rest start signal, and fails to detect the periodic component based on the motion of the user in the body motion signal for a predetermined period.

Portable electronic apparatus

A positioning control method of a positioning device worn on a user&#x25a1;s body includes switching a positioning mode to a swimming mode and executing a positioning operation for the swimming mode when the positioning mode is switched to the swimming mode.

Positioning control method and positioning device

A positioning control method of a positioning device worn on a user's body includes switching a positioning mode to a swimming mode and executing a positioning operation for the swimming mode when the positioning mode is switched to the swimming mode.

An electronic apparatus includes a controller that intermittently drives a receiver in a predetermined cycle, the receiver receiving a positioning signal to generate predetermined information, and the controller determines an upper limit of a period to be spent for the generation of the predetermined information on the basis of a period spent for the generation in the past.

Electronic apparatus, and receiver control method

A method of determining reliability of a received signal is provided, which includes correlating a received signal from a satellite to a replica code, determining reliability of the received signal according to a predetermined reference using a first value and a second value, the first value being a correlation value of a peak phase obtained from the correlating and the second value being a correlation value of a phase delayed for a predetermined phase from the peak phase and changing the reference according to the satellite.

Method of determining reliability of received signal, method of calculating code phase error, and apparatus for determining reliability of received signal

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Matsumoto, Japan

Fumikazu Sano