Abstract: A rank estimation device in which a load on a rank estimation process can be reduced is provided. The rank estimation device of the exemplary embodiment is characterized by comprising a SNR estimation section which calculates a communication quality value, a channel variation estimation section which calculates a variation value that varies at a receiver, and a simplified rank estimation section which estimates a transmission rank based on the communication quality value calculated by the SNR estimation section and the variation value calculated by the channel variation estimation section.

Abstract: In the case of a narrow band in which the number of sub-carriers to be used for the concurrent transmission is smaller than a predetermined value, an RSRP estimation unit carries out processes in an order of time-wise in-phase addition, frequency-wise averaging, and conjugate multiplication, with respect to the channel estimation values estimated by the channel estimation unit; and in the case of a wide band in which the number of sub-carriers to be used for the concurrent transmission is greater than the predetermined value, the RSRP estimation unit carries out processes in an order of frequency-wise averaging, conjugate multiplication, and time-wise in-phase addition, with respect to the channel estimation values estimated by the channel estimation unit.

Abstract: Provided are a receiver and a method of estimating signal to noise power ratio. The receiver estimates a signal-to-noise power ratio, according to an average value of a signal power and an average value of a noise power of a reference signal mapped to the received signal, estimates signal-to-noise power ratio by means of EESM operation according to each signal-to-noise power ratio of the reference signal, makes a judgment on a magnitude of either the signal-to-noise power ratio appointed according to the average values or the signal-to-noise power ratio estimated by means of the EESM operation, and outputs one of the signal-to-noise power ratio appointed according to the average values and the signal-to-noise power ratio estimated by means of the EESM operation, as a reception quality SNR, in response to the judgment result.

Abstract: In a wireless communication system that includes wireless base station (101) that transmits a common pilot signal and mobile terminal (102) that receives the common pilot signal transmitted from wireless base station, mobile terminal (102) measures reception quality of the signal transmitted from wireless base station (101) and transmits the measured signal reception quality information to wireless base station (101), and wireless base station (101) determines whether an individual channel or a common control channel is used to transmit the common pilot signal based on the pilot pattern of the common pilot signal, and if the wireless base station determines that the common pilot signal is transmitted by using the individual channel, the wireless base station sets the transmission density of the common pilot signal according to the reception quality of the signal, while if the wireless base station determines that the common pilot signal is transmitted by using the common control channel, the wireless base sta

Abstract: Provided are a receiver, a reception method, and a computer program, which make it possible to calculate reception quality (SNR) more exactly when simultaneous determination is performed based on the reception quality of a control channel. The receiver comprises: a calculation means for calculating the ratio of the signal power in each reference signal to the average signal power over an entire band; a determination means for determining whether or not the maximum value of the calculated ratio exceeds a predetermined threshold; and a first correction means for correcting the signal power and noise power when the maximum value is determined as exceeding the threshold.

Abstract: Provided are a receiver and a method of estimating signal to noise power ratio. The receiver estimates a signal-to-noise power ratio, according to an average value of a signal power and an average value of a noise power of a reference signal mapped to the received signal, estimates signal-to-noise power ratio by means of EESM operation according to each signal-to-noise power ratio of the reference signal, makes a judgment on a magnitude of either the signal-to-noise power ratio appointed according to the average values or the signal-to-noise power ratio estimated by means of the EESM operation, and outputs one of the signal-to-noise power ratio appointed according to the average values and the signal-to-noise power ratio estimated by means of the EESM operation, as a reception quality SNR, in response to the judgment result.

Abstract: A terminal device is provided for solving the problem of large overhead expended in the PMI calculation process. A reception quality measurement unit (14) measures, for each block frequency band, the reception quality of a signal received by a communication processing unit (13). A reception quality judgment unit (15) determines for each block frequency band whether the reception quality is greater than a first threshold value. A calculation unit (16a) individually computes the individual PMI for each frequency band for which the reception quality is equal to or less than the first threshold value, and further, computes for each frequency band for which the reception quality is greater than the first threshold value a common PMI that is common to these frequency bands. A report unit (16b) reports to the wireless base station the correspondence between the frequency bands and the individual PMI and common PMI that were computed.

Abstract: In the case of a narrow band in which the number of sub-carriers to be used for the concurrent transmission is smaller than a predetermined value, an RSRP estimation unit carries out processes in an order of time-wise in-phase addition, frequency-wise averaging, and conjugate multiplication, with respect to the channel estimation values estimated by the channel estimation unit; and in the case of a wide band in which the number of sub-carriers to be used for the concurrent transmission is greater than the predetermined value, the RSRP estimation unit carries out processes in an order of frequency-wise averaging, conjugate multiplication, and time-wise in-phase addition, with respect to the channel estimation values estimated by the channel estimation unit.

Abstract: A rank estimation device in which a load on a rank estimation process can be reduced is provided. The rank estimation device of the exemplary embodiment is characterized by comprising a SNR estimation section which calculates a communication quality value, a channel variation estimation section which calculates a variation value that varies at a receiver, and a simplified rank estimation section which estimates a transmission rank based on the communication quality value calculated by the SNR estimation section and the variation value calculated by the channel variation estimation section.

Abstract: Provided is a communication apparatus which calculates a CQI indicating reception quality of a reception signal in a receiver and feeds back the CQI to a transmitter, the CQI containing information obtained by averaging SNRs of a plurality of subbands, which are generated by dividing a reception band into a predetermined number, in the reception band, the communication apparatus including a CQI/PMI/RI estimation unit directly uses an initial value in a predetermined approximation method as an approximation calculation result obtained by the predetermined approximation method to thereby simplify the calculation, when the predetermined approximation method is used for calculation in the averaging in place of root calculation and when values of the SNRs are high.

Abstract: In a wireless communication system that includes wireless base station (101) that transmits a common pilot signal and mobile terminal (102) that receives the common pilot signal transmitted from wireless base station, mobile terminal (102) measures reception quality of the signal transmitted from wireless base station (101) and transmits the measured signal reception quality information to wireless base station (101), and wireless base station (101) determines whether an individual channel or a common control channel is used to transmit the common pilot signal based on the pilot pattern of the common pilot signal, and if the wireless base station determines that the common pilot signal is transmitted by using the individual channel, the wireless base station sets the transmission density of the common pilot signal according to the reception quality of the signal, while if the wireless base station determines that the common pilot signal is transmitted by using the common control channel, the wireless base sta

Abstract: A terminal device is provided for solving the problem of large overhead expended in the PMI calculation process. A reception quality measurement unit (14) measures, for each block frequency band, the reception quality of a signal received by a communication processing unit (13). A reception quality judgment unit (15) determines for each block frequency band whether the reception quality is greater than a first threshold value. A calculation unit (16a) individually computes the individual PMI for each frequency band for which the reception quality is equal to or less than the first threshold value, and further, computes for each frequency band for which the reception quality is greater than the first threshold value a common PMI that is common to these frequency bands. A report unit (16b) reports to the wireless base station the correspondence between the frequency bands and the individual PMI and common PMI that were computed.

Abstract: A shading spacer for liquid crystal consisting of a cross-linked polymer particles containing a dyestuff which is fixed in said polymer particles by taking a dyestuff compound having a silyl group which can be hydrolyzed in said polymer particles having a silyl group which can be hydrolyzed when said polymer particles are cross-linked, is provided in the present invention. In said shading spacer, removal of dyestuff from said polymer particles is prevented.