Abstract: A position detection system is provided in which it is possible to inhibit deterioration in accuracy of detecting a position of a terminal after communication environment is changed even in a case where the communication environment is changed in the position detection system. In the position detection system, a first terminal measures radio wave intensity of radio waves from a plurality of wireless connection devices in the first terminal, and transmits a measurement result to a position detection server through each of the wireless connection devices. A second terminal is disposed in a prescribed position, measures the radio wave intensity of the radio waves from the plurality of wireless connection devices in the prescribed position, generates first reference data including information of the measured radio wave intensity, and transmits the first reference data to the position detection server through the wireless connection devices.

Abstract: Provided is a sensor network system including sensor master devices (15A to 15D) which receive detection information obtained by sensors (11A to 11F) through wireless communication, a data server (17) which acquires the detection information from the sensor master devices (15A to 15D) through power line communication, and notification devices (13A, 13B) which receive notification information from the data server (17) to perform notification, in which the sensor master devices (15A to 15D) are connected to the sensors (11A to 11F) and the notification devices (13A, 13B), and the data server (17) determines an object to be notified in accordance with, for example, a detection position which is detection information for at least one of an object to be notified and notification contents, on the basis of the acquired detection information.

Abstract: A position detection system is provided which is capable of inhibiting an increase in system costs and improving accuracy of detecting a position of a terminal. In the position detection system, a first terminal measures radio waves from a wireless connection device or a second terminal, and transmits a measurement result to a position detection server through the wireless connection device.

Abstract: Provided is a sensor network system including sensor master devices (15A to 15D) which receive detection information obtained by sensors (11A to 11F) through wireless communication, a data server (17) which acquires the detection information from the sensor master devices (15A to 15D) through power line communication, and notification devices (13A, 13B) which receive notification information from the data server (17) to perform notification, in which the sensor master devices (15A to 15D) are connected to the sensors (11A to 11F) and the notification devices (13A, 13B), and the data server (17) determines an object to be notified in accordance with, for example, a detection position which is detection information for at least one of an object to be notified and notification contents, on the basis of the acquired detection information.

Abstract: A position detection system is provided in which it is possible to inhibit deterioration in accuracy of detecting a position of a terminal after communication environment is changed even in a case where the communication environment is changed in the position detection system. In the position detection system, a first terminal measures radio wave intensity of radio waves from a plurality of wireless connection devices in the first terminal, and transmits a measurement result to a position detection server through each of the wireless connection devices. A second terminal is disposed in a prescribed position, measures the radio wave intensity of the radio waves from the plurality of wireless connection devices in the prescribed position, generates first reference data including information of the measured radio wave intensity, and transmits the first reference data to the position detection server through the wireless connection devices.

Abstract: A position detection system is provided which is capable of inhibiting an increase in system costs and improving accuracy of detecting a position of a terminal. In the position detection system, a first terminal measures radio waves from a wireless connection device or a second terminal, and transmits a measurement result to a position detection server through the wireless connection device.

Abstract: A job extraction method, includes: referring to first information indicating an input time, a start time, an execution time, and a number of computation resources to be used, for each of jobs to be executed using one of computation resources; specifying first jobs having a first waiting time and a first start time later than a second start time of a second job having a second input time earlier than the first input time; and extracting, based on second information indicating a time-sequential transition of a number of computation resources not being used, a third job for which a state where computation resources of a number being equal to or greater than the number of computation resources to be used for one of the first jobs are not being used has continued for a first execution time of the first job or longer during the first waiting time.

Abstract: A job extraction method, includes: referring to first information indicating an input time, a start time, an execution time, and a number of computation resources to be used, for each of jobs to be executed using one of computation resources; specifying first jobs having a first waiting time and a first start time later than a second start time of a second job having a second input time earlier than the first input time; and extracting, based on second information indicating a time-sequential transition of a number of computation resources not being used, a third job for which a state where computation resources of a number being equal to or greater than the number of computation resources to be used for one of the first jobs are not being used has continued for a first execution time of the first job or longer during the first waiting time.

Abstract: Provided are a power line communication device and the like capable of keeping attenuation of electric power of a control signal to a minimum. The power line communication device includes a communication unit (220) and a switch unit (SW). The communication unit (220) is connected in parallel to a PV panel (10) that is connected in series to a power line (PL), and communicates the control signal relating to power generation by the PV panel (10) through the power line (PL). The switch unit (SW) is connected in parallel to the communication unit (220).

Abstract: A communication device for transmitting data to an other communication device via a transmission channel, includes a communication characteristic acquisition section which acquires a communication characteristic of the transmission channel, and a frame length control section which controls a frame length of a communication frame storing the data based on the communication characteristic of the transmission channel.

Abstract: A communication apparatus is connected to a transmission channel for transmitting data to another communication apparatus. The communication apparatus includes: a communication frame generator which generates a communication frame for storing the data; and a controller which controls to insert a pilot symbol into the communication frame based on a state of the transmission channel.

Abstract: A wave detecting section of a receiver has a first wavelet transformer involving a plurality of wavelet filters orthogonal to each other for performing a wavelet transform on received waveform data, a Hilbert transformer for performing a Hilbert transform on the received waveform data, a second wavelet transformer having the same configuration as that of the first wavelet transformer for performing a wavelet transform on outputs from the Hilbert transformer, a code converter for inverting the codes of outputs in odd-numbered places among outputs from the second wavelet transformer, a level converter for correcting fluctuations of outputs from the code converter attributable to a ripple of the Hilbert transformer, and a complex data generator for generating complex data, by defining outputs of the first wavelet transformer as in-phase components of the complex information and outputs from the level converter as orthogonal components of the complex information.

Abstract: A communication apparatus has an A/D converter which converts an analog signal which was received, into a digital signal, a converter which converts a reception signal so as to enable handling of phase information, a carrier detector which detects presence or absence of the reception signal, a synchronous circuit which extract synchronization timing from the reception signal, an equalizer which corrects the reception signal so as to cancel influence of a transmission path, a channel estimator which estimates a state of a power line channel, and a decision unit which decides the reception signal, which was amended by the equalizer, by use of a threshold value.

Abstract: A diversity circuit uses a plurality of sub-carriers showing CINRs below a lowest threshold, so as to form a sub-carrier group so that combined CINR of the sub-carriers is above the lowest threshold. A diversity tone map generator generates a tope map associated with the lowest primary modulation scheme, based on output from the diversity circuit. A tone map generator generates a tone map associated with primary modulation schemes applied to respective sub-carriers, based on output from the diversity tone map generator.

Abstract: A communication apparatus has an A/D converter which converts an analog signal which was received, into a digital signal, a converter which converts a reception signal so as to enable handling of phase information, a carrier detector which detects presence or absence of the reception signal, a synchronous circuit which extract synchronization timing from the reception signal, an equalizer which corrects the reception signal so as to cancel influence of a transmission path, a transmission path estimator which estimates a state of a power line transmission path, and a judging unit which judges the reception signal, which was amended by the equalizer, by use of a threshold value.

Abstract: A communication device for transmitting data to an other communication device via a transmission channel, includes a communication characteristic acquisition section which acquires a communication characteristic of the transmission channel, and a frame length control section which controls a frame length of a communication frame storing the data based on the communication characteristic of the transmission channel.

Abstract: A communication apparatus has an A/D converter which converts an analog signal which was received, into a digital signal, a converter which converts a reception signal so as to enable handling of phase information, a carrier detector which detects presence or absence of the reception signal, a synchronous circuit which extract synchronization timing from the reception signal, an equalizer which corrects the reception signal so as to cancel influence of a transmission path, a transmission path estimator which estimates a state of a power line transmission path, and a judging unit which judges the reception signal, which was amended by the equalizer, by use of a threshold value.

Abstract: A wave detecting section of a receiver has a first wavelet transformer involving a plurality of wavelet filters orthogonal to each other for performing a wavelet transform on received waveform data, a Hilbert transformer for performing a Hilbert transform on the received waveform data, a second wavelet transformer having the same configuration as that of the first wavelet transformer for performing a wavelet transform on outputs from the Hilbert transformer, a code converter for inverting the codes of outputs in odd-numbered places among outputs from the second wavelet transformer, a level converter for correcting fluctuations of outputs from the code converter attributable to a ripple of the Hilbert transformer, and a complex data generator for generating complex data, by defining outputs of the first wavelet transformer as in-phase components of the complex information and outputs from the level converter as orthogonal components of the complex information.

Abstract: A wave detecting section of a receiver has a first wavelet transformer involving a plurality of wavelet filters orthogonal to each other for performing a wavelet transform on received waveform data, a Hilbert transformer for performing a Hilbert transform on the received waveform data, a second wavelet transformer having the same configuration as that of the first wavelet transformer for performing a wavelet transform on outputs from the Hilbert transformer, a code converter for inverting the codes of outputs in odd-numbered places among outputs from the second wavelet transformer, a level converter for correcting fluctuations of outputs from the code converter attributable to a ripple of the Hilbert transformer, and a complex data generator for generating complex data, by defining outputs of the first wavelet transformer as in-phase components of the complex information and outputs from the level converter as orthogonal components of the complex information.

Abstract: A communication apparatus is connected to a transmission channel for transmitting data to another communication apparatus. The communication apparatus includes: a communication frame generator which generates a communication frame for storing the data; and a controller which controls to insert a pilot symbol into the communication frame based on a state of the transmission channel.