Abstract: A terminal device according to an aspect of the present invention includes a reception module that receives a control channel and a spatially multiplexed data signal channel, a control signal detection module that extracts, from an output from the reception module, a demodulation control information which is a transmission parameter of a signal that is transmitted to the terminal device, in a data signal channel that is output from the reception module, and assistance control information which is a transmission parameter of a signal that is transmitted to a different terminal device, in the data signal channel that is output from the reception module, a channel estimator that obtains a channel estimate by using a reference signal, a signal detection module that demultiplexes the data signal channel by using the demodulation control information, the assistance control information, and the channel estimate, and a decoding module that decodes a signal that is output by the signal detection module, in which infor

Abstract: A plurality of source-grounded transistors (3) are connected in parallel with each other, and a plurality of gate-grounded transistors (4) are connected in parallel with each other. Sources (4s) of the plurality of gate-grounded transistors (4) are connected to drains (3d) of the plurality of source-grounded transistors (3) respectively. Ground pads (5) are connected to sources (3s) of the plurality of source-grounded transistors (3). A plurality of grounding capacitances (6) are connected between gates (4g) of the plurality of gate-grounded transistors (4) and the ground pads (5). The plurality of source-grounded transistors (3) and the plurality of grounding capacitances (6) are alternately arranged between the ground pads (5) and the plurality of gate-grounded transistors (4).

Abstract: The present invention is capable of reducing a calculation amount while lessening performance degradation from MLD. The present invention is a reception device that receives a transmit signal which is transmitted from a transmission device by a MIMO transmission scheme. The reception device includes a channel estimation unit (205) that performs channel estimation using a received signal, and calculates a channel estimation value, a signal detection unit (206) that generates a bit log-likelihood ratio by MIMO demultiplexing of a received signal based on the channel estimation value, and a decoding unit (207) that performs error correction decoding with respect to the bit log-likelihood ratio.

Abstract: In a communication system including a first base station device, at least one second base station device that has smaller transmit power than that of the first base station device, and a terminal device that is connected with the first base station device or the second base station device, a transmission unit of the second base station device maps per one resource block a smaller number of reference signals than a number of reference signals mapped per one resource block by the first base station device and transmits the mapped reference signals.

Abstract: Provided are a communication system and a communication method which efficiently control connecting and switching over for a second base station device and a terminal device and which enable traffic distribution in a communication system including a first base station device, at least one second base station device, and the terminal device which is connected to the first base station device or the second base station device. In the communication system which includes the first base station device, at least one second base station device, and the terminal device connected to the first base station device or the second base station device, a transmission unit of the first base station device transmits channels in the downlink including target base station recognition information and channels in the downlink including system information of the second base station device in order to notify whether or not a subsequent connection destination is the second base station device to the terminal device.

Abstract: In a communication system that includes a first base station, a second base station, and at least one terminal that makes a connection to the second base station, a connection destination of the terminal that makes a connection to the second base station is efficiently switched. The terminal that makes a connection to the second base station determines received quality of each of a neighboring base station that is positioned in the neighborhood of the second base station and the second base station, and notifies a macro cell base station and the second base station of the received quality. Furthermore, the first base station or the second base station determines whether or not the terminal has to perform handover, based on the received quality. In a case where the handover has to be performed, the first base station determines the connection destination of the terminal, based on the received quality notified from the terminal, and provides a handover instruction.

Abstract: It is possible to effectively perform feedback in a communication system in which base station devices cooperatively communicate. A feedback information generation unit 208 has a function of adjusting the amount of information used for representing a channel estimated value which is output from a channel estimation unit 206, depending on each base station device. In other words, among a feedback information amount used for representing a channel estimated value between the mobile station device and the base station device connected to the mobile station device, and a feedback information amount used for representing a channel estimated value between the mobile station device and a base station device other than the base station device connected to the mobile station device, the feedback information amount used for representing one type of channel estimated value is adjusted so as to be less than the feedback information amount used for representing the other type of channel estimated value.

Abstract: In a wireless communication system in which a base station and a terminal communicate with each other, the terminal switches connection destinations efficiently. The terminal includes a positional information measurement unit, notifies the base station of positional information, and based on connection base station information transmitted from the base station, generates a synchronization signal of the connection base station information, and communicates with the connection base station. The terminal transmits terminal information to a first base station, and starts communication with a second base station based on information notified from the first base station. The terminal information is positional information, which is obtained by the GPS or a positioning reference signal.

Abstract: Provided are a communication system and a communication method which are capable of preventing control of connection and switching between second base station devices from being complicated in the communication system in which a first base station device and the plurality of second base station devices are disposed so that the second base station devices overlap a cell range of the first base station device. In the communication system in which the first base station device and the plurality of second base station devices are disposed so that the second base station devices overlap the cell range of the first base station device, a transmission unit of the first base station device transmits a broadcast channel for notifying broadcast information of the first base station device and a downlink control channel including broadcast information of the second base station device to a terminal device.

Abstract: GI removers b102-nR remove a GI from received signals. FFT units b103-nR apply a time-to-frequency transform to the signals obtained in the GI removers b102-nR. Demapping units b104-nR separate from the obtained frequency-domain signals the received signals of resource elements in which data, a first pilot symbol, and a second pilot symbol were respectively transmitted. Path extractors b105-nR use the first pilot symbol to extract effective paths for estimation. Channel estimators b106-nR compute first CFR estimation values using the second pilot symbol, compute CIR estimation values by using path location information extracted by the path extractors and the first CFR estimation values, and then convert the CIR estimation values into second CFR estimation values.

Abstract: The present invention is capable of reducing a calculation amount while lessening performance degradation from MLD. The present invention is a reception device that receives a transmit signal which is transmitted from a transmission device by a MIMO transmission scheme. The reception device includes a channel estimation unit (205) that performs channel estimation using a received signal, and calculates a channel estimation value, a signal detection unit (206) that generates a bit log-likelihood ratio by MIMO demultiplexing of a received signal based on the channel estimation value, and a decoding unit (207) that performs error correction decoding with respect to the bit log-likelihood ratio.

Abstract: A high degree of interference suppression effect is attained in a communication system in which communication is performed among base station devices in a coordinated manner.

Abstract: The present invention provides a glyoxime derivative displaying excellent pesticidal effect or a salt thereof and a pesticide containing the same as an active ingredient. This pesticide is characterized by containing as an active ingredient, a glyoxime derivative expressed by the general formula [I] (in which X represents a cyano group or a carbamoyl group, R1 represents a C1˜C8 alkyl group, a C3˜C6 cycloalkyl C1˜C6 alkyl group, etc, and R2 represents a hydrogen atom, a C1˜C8 alkyl group, a C3˜C6 cycloalkyl C1˜C6 alkyl group, etc.) or an agriculturally acceptable salt thereof.

Abstract: A reference signal generation unit 105 generates a reference signal and inputs it to resource-mapping units 106-1 to 106-T. There may be a plurality of types of reference signals depending on purposes. In the present disclosure, only a user-specific demodulation reference signal (DM-RS) is described. The resource-mapping units 106-1 to 106-T map DM-RS's and an input from the precoding unit 104 to a resource such that they are orthogonal between transmitting antennas and between transmission points.

Abstract: A receiver apparatus includes a propagation channel estimating unit that estimates a propagation channel. The propagation channel estimating unit includes a path detector unit that repeatedly performs a process of detecting paths in the order of increase in a propagation channel goodness of fit. The receiver apparatus that estimates a propagation channel at a high accuracy level with a small amount of calculation operation involved is thus provided.

Abstract: A receiver apparatus includes a first frequency response estimator configured to calculate a first frequency response estimation value using a reference signal, a duration extractor configured to determine an estimation duration by extracting at least one duration from among a plurality of duration candidates into which a predetermined maximum delay time is divided, and a second frequency response estimator configured to calculate a second frequency response estimation value as a frequency response estimation value for demodulation using the first frequency response and the estimation duration. The receiver apparatus thus performs high-precision channel estimation even if a variety of PDPs occur with time.

Abstract: An amplifier circuit is configured in such a manner that the withstand voltage between the terminals of a FET 2 (withstand voltage B) is higher than the withstand voltage between the terminals of a FET 1 (withstand voltage A), and that the gate width of the FET 1 (Wg1) is narrower than the gate width of the FET 2 (Wg2). This makes it possible to increase the gain while maintaining high output power. The narrow gate width of the FET 1 (Wg1) connected to an input terminal 3 enables reducing the size of the cascode amplifier.

Abstract: GI removers b102-nR remove a GI from received signals. FFT units b103-nR apply a time-to-frequency transform to the signals obtained in the GI removers b102-nR. Demapping units b104-nR separate from the obtained frequency-domain signals the received signals of resource elements in which data, a first pilot symbol, and a second pilot symbol were respectively transmitted. Path extractors b105-nR use the first pilot symbol to extract effective paths for estimation. Channel estimators b106-nR compute first CFR estimation values using the second pilot symbol, compute CIR estimation values by using path location information extracted by the path extractors and the first CFR estimation values, and then convert the CIR estimation values into second CFR estimation values.

Abstract: A receiver apparatus includes a channel estimator (b106) to perform channel estimation. The channel estimator includes an interim channel impulse estimating unit (b106-1) that calculates an interim channel impulse response estimation value, a path extracting unit (b106-3) that extracts a path for use in calculation of a channel impulse response estimation value from among paths forming the interim channel impulse response estimation values, a channel impulse response estimating unit (b106-4) that calculates the channel impulse response estimation value using the path extracted by the path extracting unit, and a frequency response estimating unit (b106-5) that converts the channel impulse response estimation value into a frequency response estimation value by time-frequency transforming the channel impulse response estimation value. In this way, a receiver apparatus capable of performing accurate channel estimation results.

Abstract: Frequency utilization efficiency is increased while inter-cell interference is controlled. A communication system 1 includes a base station apparatus and at least one terminal apparatus communicating with each other in each of a plurality of communication areas, with the communication areas adjacent to or overlapping each other. A macro cell base station apparatus 100 in one of the communication areas allocates the same frequency bandwidth to the terminal apparatuses in the communication areas. The macro cell base station apparatus 100 calculates a transmit weight and a receive weight according to which the terminals having the same frequency bandwidth allocated thereto perform coordinated control.