Abstract: Provided is a work vehicle that can easily reduce the manufacturing cost by downsizing and simplifying a case support body and can easily simplify a support structure for a second case. The work vehicle includes an operation unit for an operator to get in, a first case for removing particulate matter in exhaust gas from the engine, and the second case for removing nitrogen oxides in the exhaust gas from the engine. In addition, the work vehicle includes a traveling machine body frame on which the operation unit is mounted, and the case support body for supporting the second case. The case support body is disposed on the traveling machine body frame, and the second case is attached to the traveling machine body frame via the case support body.

Abstract: Provided is a work vehicle that can easily reduce the manufacturing cost by downsizing and simplifying a case support body and can easily simplify a support structure for a second case. The work vehicle includes an operation unit for an operator to get in, a first case for removing particulate matter in exhaust gas from the engine, and the second case for removing nitrogen oxides in the exhaust gas from the engine. In addition, the work vehicle includes a traveling machine body frame on which the operation unit is mounted, and the case support body for supporting the second case. The case support body is disposed on the traveling machine body frame, and the second case is attached to the traveling machine body frame via the case support body.

Abstract: A communication apparatus comprises a reception unit that receives a reception signal from a metal cable and extracts reception data; a transmission unit that sends a transmission signal obtained by modulating transmission data with a frequency included in a first frequency band to the metal cable; an interference signal detection unit that detects a signal used in wireless communication, modulated by a frequency included in a second frequency band, and transmitted over the metal cable as an interference signal; and a signal transmission control unit that instructs the transmission unit to modulate transmission data using a frequency included in a third frequency band that does not have any frequency band overlapping the second frequency band when the interference signal is detected and a frequency band overlapping both the first frequency band and the second frequency band exists.

Abstract: A communication apparatus comprises a reception unit that receives a reception signal from a metal cable and extracts reception data; a transmission unit that sends a transmission signal obtained by modulating transmission data with a frequency included in a first frequency band to the metal cable; an interference signal detection unit that detects a signal used in communication using a cable modem, modulated by a frequency included in a second frequency band, and transmitted over the metal cable as an interference signal; and a signal transmission control unit that instructs the transmission unit to modulate transmission data using a frequency included in a third frequency band that does not have any frequency band overlapping the second frequency band when the interference signal is detected and a frequency band overlapping both the first frequency band and the second frequency band exists.

Abstract: A communication apparatus comprises a reception unit that receives a reception signal from a metal cable and extracts reception data; a transmission unit that sends a transmission signal obtained by modulating transmission data with a frequency included in a first frequency band to the metal cable; an interference signal detection unit that detects a signal used in communication using a cable modem, modulated by a frequency included in a second frequency band, and transmitted over the metal cable as an interference signal; and a signal transmission control unit that instructs the transmission unit to modulate transmission data using a frequency included in a third frequency band that does not have any frequency band overlapping the second frequency band when the interference signal is detected and a frequency band overlapping both the first frequency band and the second frequency band exists.

Abstract: A communication apparatus comprises a reception unit that receives a reception signal from a metal cable and extracts reception data; a transmission unit that sends a transmission signal obtained by modulating transmission data with a frequency included in a first frequency band to the metal cable; an interference signal detection unit that detects a signal used in wireless communication, modulated by a frequency included in a second frequency band, and transmitted over the metal cable as an interference signal; and a signal transmission control unit that instructs the transmission unit to modulate transmission data using a frequency included in a third frequency band that does not have any frequency band overlapping the second frequency band when the interference signal is detected and a frequency band overlapping both the first frequency band and the second frequency band exists.

Abstract: A bit-power distribution ratio calculation unit measures several times an SNR of periodic noise occurring on a communication line to calculate several times, according to the measurement results of the SNR thus measured, a bit distribution ratio to be assigned to each carrier for data transmission for each measurement result. The calculation unit compares the calculated bit distribution ratios with each other to detect a minimum bit value of each carrier to calculate, according to the detected minimum bit values of the respective carriers, a minimum bit distribution ratio including the minimum bit value of each carrier. The calculation unit delivers the minimum bit distribution ratio to a demapping unit and a mapping unit, which conduct data transmission using the minimum bit distribution ratio. Therefore, a multicarrier transmission device can efficiently conduct multicarrier transmission even at occurrence of non-periodic noise.