Abstract: A receiving device includes: a receiver that receives a signal including PPM symbols; a clock generator that generates a clock for sampling; an A/D converter that digital-converts the received signal; a reference position detector that detects a leading position of the PPM symbols based on data from the A/D converter; and a clock error detector that detects a clock error. The clock error detector includes: a pulse position detector that detects a pulse position in the PPM symbols based on data from the reference position detector and A/D converter; a position error calculator that calculates a deviation of the pulse position based on data from the reference position detector, A/D converter, and pulse position detector; and a clock error calculator that calculates the clock error based on data from the position error calculator. The receiving device varies a frequency of the clock based on data from the clock error calculator.

Abstract: A hanging-strap information display device is a device provided in a hanging strap (10) including a hanging band part (11) hung in a movable body in a swingable manner and a hold part (12) provided on the hanging band part, and includes a display unit (14) disposed at a position that squarely faces a passenger that grips the hold part (12), a support shaft part (13) that supports the display unit (14) on the hanging band part (11) in a rotatable manner about a rotation center line, a weight (15) provided on a lower side in a vertical direction than the rotation center line of the display unit (14), and resonance reduction members (16, 17) that is connected between the hanging band part (11) and a position away from the rotation center line of the display unit (14) and reduces resonance of the display unit (14).

Abstract: A receiving device includes: a receiver that receives a signal including PPM symbols; a clock generator that generates a clock for sampling; an A/D converter that digital-converts the received signal; a reference position detector that detects a leading position of the PPM symbols based on data from the A/D converter; and a clock error detector that detects a clock error. The clock error detector includes: a pulse position detector that detects a pulse position in the PPM symbols based on data from the reference position detector and A/D converter; a position error calculator that calculates a deviation of the pulse position based on data from the reference position detector, A/D converter, and pulse position detector; and a clock error calculator that calculates the clock error based on data from the position error calculator. The receiving device varies a frequency of the clock based on data from the clock error calculator.

Abstract: A hanging-strap information display device is a device provided in a hanging strap (10) including a hanging band part (11) hung in a movable body in a swingable manner and a hold part (12) provided on the hanging band part, and includes a display unit (14) disposed at a position that squarely faces a passenger that grips the hold part (12), a support shaft part (13) that supports the display unit (14) on the hanging band part (11) in a rotatable manner about a rotation center line, a weight (15) provided on a lower side in a vertical direction than the rotation center line of the display unit (14), and resonance reduction members (16, 17) that is connected between the hanging band part (11) and a position away from the rotation center line of the display unit (14) and reduces resonance of the display unit (14).

Abstract: A digital broadcast receiver receives a digital broadcast signal through a plurality of antennas, orthogonally demodulates the received signals, performs channel estimation by detecting a delay profile from a known signal included in each of the orthogonally demodulated signals, and uses the channel estimation results to equalize data signals included in the orthogonally demodulated signals. The delay profiles are also used to estimate the signal quality of each of the equalized data signals by determining the power of the signal component and the power of the noise component in each delay profile and calculating a signal to noise ratio. Diversity combining is performed by weighting the equalized data signals on a basis of their estimated signal quality.

Abstract: A digital broadcast receiver receives a digital broadcast signal through a plurality of antennas, orthogonally demodulates the received signals, performs channel estimation by detecting a delay profile from a known signal included in each of the orthogonally demodulated signals, and uses the channel estimation results to equalize data signals included in the orthogonally demodulated signals. The delay profiles are also used to estimate the signal quality of each of the equalized data signals by determining the power of the signal component and the power of the noise component in each delay profile and calculating a signal to noise ratio. Diversity combining is performed by weighting the equalized data signals on a basis of their estimated signal quality.