Abstract: A signal detector arranged in a receiver of a wireless communication device includes a variable passband bandpass filter configured to bandlimit a received signal using a variable passband; a signal parameter detection unit configured to detect a signal parameter of each of a plurality of signals contained in the received signal; a detection order determination unit configured to determine a detection order for detecting the signals from the received signal based on the signal parameter; a parameter control unit configured to control the passband of the variable passband bandpass filter based on the detection order and the signal parameter; and an equalization and decision unit configured to equalize and decide the bandlimited signal output from the variable passband bandpass filter. The signals contained in the received signal are successively detected from the received signal according to the detection order by means of the variable passband bandpass filter and the equalization and decision unit.

Abstract: A frequency band allocation device is disclosed. The frequency band allocation device comprises a frequency band selection unit (1161, 1162) for selecting usable frequency bands from a dedicated frequency band, a registered frequency band and an unlicensed frequency band; and a frequency band allocation unit (1163) for allocating a frequency band out of the selected usable frequency bands to an uplink and downlink, so as to satisfy user required QoS.

Abstract: A frequency band allocation device is disclosed. The frequency band allocation device comprises a frequency band selection unit for selecting usable frequency bands from a dedicated frequency band, a registered frequency band and an unlicensed frequency band; and a frequency band allocation unit for allocating a frequency band out of the selected usable frequency bands to a user, so as to satisfy user required QoS and maximize system frequency utilization factor.

Abstract: A transmitter used in the multiband environment includes a frequency allocation unit (106) configured to select and allocate a frequency band that satisfies a user QoS from among multiple separate frequency bands currently available for the user, a parameter determination unit (111) configured to determine a transmission parameter required for signal transmission based on the allocated frequency band, and a multi-user scheduling control unit (110) configured to determine a transmission schedule for multiple users taking into account the frequency bands allocated to the multiple users.

Abstract: A communication node relays a transmission signal transmitted from a desired source node to a target destination node among multiple source nodes and multiple destination nodes. The communication node includes a first unitary matrix estimation unit that estimates a first unitary matrix by performing singular value decomposition involving one or more channel matrices between the relay node and the source nodes other than the desired source node; a second unitary matrix estimation unit that estimates a second unitary matrix by performing singular value decomposition involving one or more channel matrices between the relay node and the destination nodes other than the target destination node; and a transmission unit configured to transmit a relaying signal generated by multiplying a received signal by the first and second unitary matrices toward the target destination node.

Abstract: A communication node that relays signals between a source node and a destination node includes (a) a first unitary matrix calculation unit configured to calculate a first unitary matrix based on a first channel between the source node and the relay node, (b) a second unitary matrix calculation unit configured to calculate a second unitary matrix based on a second channel between the relay node and the destination node, (c) a transformation matrix estimation unit configured to estimate a transformation matrix based on a triangular matrix derived from QR decomposition of the first and/or second channel matrix, (d) a relaying signal generator configured to generates a relaying signal by multiplying a received signal by at least one of the first unitary matrix, the second unitary matrix, and the transformation matrix, and (e) a transmission unit configured to transmit the relaying signal to the destination node.

Abstract: A shared frequency transmitter for use in a network environment where transmitters and receivers of plural radio communication systems in which the same frequency is used exist is disclosed. The shared frequency transmitter includes (a) a communicating unit configured to detect peripheral transmitters existing in a peripheral area, and to exchange information with the detected peripheral transmitters; and (b) a signal generating unit configured to generate a transmit signal by applying an interference cancellation technique based on the information obtained through the exchange of information.

Abstract: A radio frequency selection device in a radio communication system in which a radio communication channel is established between a mobile station and a base station by allocating a radio communication frequency band different from other radio communication system frequency bands is disclosed. The radio frequency selection device comprises: a frequency band determining unit that determines a radio control channel frequency band for transmitting control information, among frequency bands allocated to the radio communication system, based on the allocated radio communication channel frequency band; and a radio control channel establishing unit that establishes a radio control channel among the determined radio control channel frequency bands.

Abstract: A receiver comprises multiple receiving antennas configured to receive bitstreams transmitted from multiple transmission antennas; a bitstream candidate estimator configured to estimate a prescribed number of bitstream candidates among possible combinations of the received bitstreams and to calculate reliability information for each of the candidates; a bit-based estimator configured to produce a bit-based estimation result for each bit of the transmitted bitstreams based on the estimated candidates and the associated reliability information, the bit-based estimation result being adjusted by an adjusting criterion determined by the reliability information; and a decoder configured to decode the transmitted bitstreams based on the adjusted bit-based estimation result.

Abstract: A frequency selection apparatus, a mobile communications system, and a multi-band resource management method are disclosed. The frequency selection apparatus includes an acquisition unit configured to collect environmental information about a mobile station for each frequency band according to system frequency bands that a mobile station can use, and a frequency selection unit configured to determine the frequency band to be used and the system to be connected to, based on the environmental information and information provided by the mobile station.

Abstract: A radio transmitter adopting the OFDM scheme is disclosed. The radio transmitter includes an amplitude measuring part for measuring the amplitude of a transmission signal on which inverse Fourier transform has been performed; a power control part for outputting, based on the result of the measurement, control signals each for adjusting the amplitude of a signal on which inverse Fourier transform has not been performed, each signal corresponding to one of plural sub-carriers; and multiple multiplying parts each for multiplying the amplitude of the signal by a multiplying number indicated by the control signal. The power control part outputs the control signal based on a product of a signal pf(n) obtained by performing Fourier transform on an output of the amplitude measuring part and the signal sf(n).

Abstract: A wireless communication system is disclosed that transmits a feedback signal containing a channel estimate value between a first wireless communication device and a second wireless communication device. The first wireless communication device that transmits the feedback signals includes: a channel estimation unit that receives signals containing pilot signals, and determines the channel estimate value of a wireless link; a multiplier that multiplies a pilot signal by the channel estimate value; and a multiplexer that multiplexes an output signal from the multiplier with another pilot signal, to generate the feedback signal. The second wireless communication device that receives the feedback signal includes: a separator that separates the signals that are multiplexed in the feedback signal; and channel estimation units that determine the channel estimate value of the wireless link, based on the separated signals.

Abstract: A signal reception device is disclosed that is able to improve interference cancellation capabilities even when signals having different center frequencies exist on the same frequency band. The signal reception device includes an interference suppression unit to generate replicas of plural signals in the received signal and separate the signals by suppressing interference signals. The interference suppression unit includes a signal phase rotator to rotate phases of the signal candidates at preset respective rotational frequencies, the preset rotational frequencies being related to respective center frequencies of the signals in the received signal; a rotational frequency controller to set the preset rotational frequencies; and a replica generator to generate the replicas of the signals by using the phase-rotated signal candidates.

Abstract: A recording medium includes a substrate and an ink-receiving layer provided on the substrate, wherein the ink—receiving layer includes an alumina hydrate having a boehmite structure, an average particle thickness of 2.0 to 6.0 nm and a crystallite size of 5.0 to 8.0 nm in a direction of a (020) plane, and the recording medium has a degree of parallelization of 30 to 1,000.

Abstract: A signal separator for separating multiple signals contained in a received signal from each other based on a replica of the received signal is provided.

Abstract: An inkjet recording apparatus includes a head assembly in which a plurality of head chips, each having multiple nozzles arranged therein for discharging ink, are disposed in the arrangement direction of the nozzles. The discharge of ink from the nozzles of each head chip in band-boundary regions in which bands recorded by the head chips overlap each other is adjusted in accordance with the detection result of the temperature of each head chip.

Abstract: According to the present invention, a control station 5 determines a number of groups to which cells belong, based on interference between the cells. Preferably, the control station 5 determines the number of groups as a number smaller than the number of cells constituting a closed cluster. The control station 5 determines the groups to which the cells belong, so as to keep constant shortest distances between cells belonging to the same group. Then the control station 5 determines a frequency band to be assigned to a cell belonging to a determined group, in each of the group units, and assigns different frequency bands to the respective groups.

Abstract: A compound of Formula (I): [wherein R1 represents a lower alkyl group, X represents an oxygen atom or a methylene group, m represents an integer of 1 to 10, and n represents an integer of 0 to 5] or a salt or ester thereof; a medicament and a pharmaceutical composition comprising one or more such compounds; a method for preventing or treating a disease closely related to androgen, which comprises administering an effective amount of one or more such compounds; a kit used for such prevention or treatment; and the use of one or more such compounds for the manufacture of the medicament.

Abstract: A mobile communication system capable of determining a communication path to implement fast communication by multihop connection. The mobile communication system includes a mobile station, at least one relay station, and a base station and implements packet transmission from the mobile station to the base station through a communication path with an intermediary of at least one relay station or through a communication path without an intermediary of a relay station. The mobile communication system is provided with a communication path determiner for determining a communication path with a largest communication speed or a communication path satisfying a required line quality, based on interference levels of respective signals received at a relay station constituting a communication path between the transmitting station and the receiving station, and at the base station.