Abstract: A reception device receives, by a plurality of antennas, signals in which a plurality of radio signals are superimposed, the reception device including: a weight generation unit that generates a weight for beamforming in order to improve reception quality of a desired signal, which is one of the plurality of the radio signals, on the basis of a reception timing and a frequency of the signals received individually by the antennas; a weight correction unit that performs correction, on the weight, in order to compensate for a Doppler shift between the signals received individually by the antennas on the basis of the frequency of the signals received individually by the antennas; and a combining unit that combines the signals received individually by the antennas using the weight obtained after the correction.

Abstract: A transmitting apparatus includes an analog transmitting unit that performs analog processing on a multiplex signal in which two or more signals are multiplexed and generates a transmission signal, and a signal multiplexing and learning unit that multiplexes the two or more signals with a neural network whose parameters have been adjusted based on the analog characteristics of the analog transmitting unit and constraints on the multiplex signal and generates the multiplex signal.

Abstract: A reception device includes an equalization processing unit including a linear filter unit and a nonlinear filter unit and performing equalization process on a reception signal; a linear propagation channel estimation unit making propagation channel estimation using a known signal included in a reception signal to calculate a filter coefficient of the linear filter unit; and a synchronization processing unit performing synchronization process of correcting frequency deviation based on a signal output by the equalization processing unit, and when a predetermined condition is satisfied after executing first equalization process of outputting a reception signal filtered by the linear filter unit to the synchronization processing unit, the equalization processing unit starts second equalization process that is an adaptive equalization process of outputting a result of addition of a reception signal filtered by the linear filter unit and a reception signal filtered by the nonlinear filter unit to the synchronizati

Abstract: A transmitting station includes an amplifier unit that amplifies a transmitting signal, a transmitting antenna that wirelessly transmits the transmitting signal that has been amplified, and a controller unit that regulates a frequency of the transmitting signal and an input power to the amplifier unit on the basis of an estimation value of reception quality that is a signal quality when the transmitting signal is received by a receiving station.

Abstract: A reception device includes an equalization processing unit including a linear filter unit and a nonlinear filter unit and performing equalization process on a reception signal; a linear propagation channel estimation unit making propagation channel estimation using a known signal included in a reception signal to calculate a filter coefficient of the linear filter unit; and a synchronization processing unit performing synchronization process of correcting frequency deviation based on a signal output by the equalization processing unit, and when a predetermined condition is satisfied after executing first equalization process of outputting a reception signal filtered by the linear filter unit to the synchronization processing unit, the equalization processing unit starts second equalization process that is an adaptive equalization process of outputting a result of addition of a reception signal filtered by the linear filter unit and a reception signal filtered by the nonlinear filter unit to the synchronizati

Abstract: A transmitting station includes an amplifier unit that amplifies a transmitting signal, a transmitting antenna that wirelessly transmits the transmitting signal that has been amplified, and a controller unit that regulates a frequency of the transmitting signal and an input power to the amplifier unit on the basis of an estimation value of reception quality that is a signal quality when the transmitting signal is received by a receiving station.

Abstract: A receiving device includes: a resampler to convert a sampling rate of a reception signal, and output a first signal that is a signal having been subjected to sampling rate conversion; an equalizer to perform an adaptive equalization process using the first signal as an input, and output a second signal that is a signal having been subjected to the adaptive equalization process and having a sampling rate that is an integer fraction of an input signal; a correlation calculator to calculate a correlation function between the first signal and the second signal; and a rate controller to control a rate conversion ratio for sampling rate conversion in the resampler on a basis of the correlation function.

Abstract: A receiving device according to the present invention includes: a search range control unit that determines, for a reception signal including a plurality of wireless signals partially overlapping on at least one of a time axis and a frequency axis and received by a moving object, a search range for the plurality of wireless signals in a search space including the time axis and the frequency axis based on information on position and velocity of the moving object; a time frequency detection unit that generates information on time and frequency at which a wireless frame included in each of the plurality of wireless signals is received in the search range for the reception signal determined by the search range control unit; and a detection unit that demodulates the reception signal to acquire the wireless frame based on the information on time and frequency generated by the time frequency detection unit.

Abstract: A receiving device according to the present invention includes: a search range control unit that determines, for a reception signal including a plurality of wireless signals partially overlapping on at least one of a time axis and a frequency axis and received by a moving object, a search range for the plurality of wireless signals in a search space including the time axis and the frequency axis based on information on position and velocity of the moving object; a time frequency detection unit that generates information on time and frequency at which a wireless frame included in each of the plurality of wireless signals is received in the search range for the reception signal determined by the search range control unit; and a detection unit that demodulates the reception signal to acquire the wireless frame based on the information on time and frequency generated by the time frequency detection unit.

Abstract: A receiving device includes: a resampler to convert a sampling rate of a reception signal, and output a first signal that is a signal having been subjected to sampling rate conversion; an equalizer to perform an adaptive equalization process using the first signal as an input, and output a second signal that is a signal having been subjected to the adaptive equalization process and having a sampling rate that is an integer fraction of an input signal; a correlation calculator to calculate a correlation function between the first signal and the second signal; and a rate controller to control a rate conversion ratio for sampling rate conversion in the resampler on a basis of the correlation function.

Abstract: A bit-likelihood calculating apparatus includes an initial-bit-likelihood calculating unit obtaining an inter-transmission-signal-point distance corresponding to N, a region number indicating a determination region of a transmission signal point nearest from data, and inter-nearest-point distance from a transmission signal point of initial bit=0 nearest to the data and a transmission signal point of initial bit=1 nearest to the data, and calculating likelihood of initial bit of the data serving as initial term of a recurrence formula for recursively calculating bit likelihood, an i-th-bit-likelihood calculating unit calculating, when N is 2 or larger, difference between inter-nearest-point distance with respect to (i?1)th bit and inter-nearest-point distance with respect to i-th bit and calculating likelihood of i-th bit of the data from likelihood of (i?1)th bit and the difference using the recurrence formula, and a processing-step control unit controlling calculation processing for bit likelihood based on N

Abstract: A bit-likelihood calculating apparatus includes an initial-bit-likelihood calculating unit obtaining an inter-transmission-signal-point distance corresponding to N, a region number indicating a determination region of a transmission signal point nearest from data, and inter-nearest-point distance from a transmission signal point of initial bit=0 nearest to the data and a transmission signal point of initial bit=1 nearest to the data, and calculating likelihood of initial bit of the data serving as initial term of a recurrence formula for recursively calculating bit likelihood, an i-th-bit-likelihood calculating unit calculating, when N is 2 or larger, difference between inter-nearest-point distance with respect to (i?1)th bit and inter-nearest-point distance with respect to i-th bit and calculating likelihood of i-th bit of the data from likelihood of (i?1)th bit and the difference using the recurrence formula, and a processing-step control unit controlling calculation processing for bit likelihood based on N

Abstract: A tension transmitting device includes a covering body placed over a target drop cable from a side thereof; and a tension transmission belt having a first end secured on a first end side of the covering body and a second end used as a free end, the tension transmission belt receiving the tension during stringing or wiring operation on a free end side thereof. The free end of the tension transmission belt extends from a secured portion thereof secured to the covering body so as to run on a covering surface side of the covering body and is wound around the drop cable. The covering body includes a slit provided on a second end side thereof, and the slit has a side receiving opening through which the tension transmission belt is received in a width direction.

Abstract: A tension transmitting device can be easily attached to and detached from a drop cable in a simple manner and can efficiently transmit tension when attached. The tension transmitting device includes: a covering body that is place over a target drop cable from a side thereof; and a tension transmission belt having a first end secured on a first end side of the covering body and a second end used as a free end, the tension transmission belt directly or indirectly receiving the tension during stringing or wiring operation on a free end side thereof. The free end side of the tension transmission belt extends from a secured portion thereof secured to the covering body so as to run on a covering surface side of the covering body and is wound around the drop cable, the drop cable being covered with the covering body on the covering surface side thereof.