Abstract: A reception device comprises a reception unit for receiving signals transmitted by assigning respectively a plurality of different frequency signal groups, which are generated based on a same bit sequence, to a plurality of layers, an MIMO separation unit for executing MIMO separation of the signals, received by the reception unit, into the frequency signal groups corresponding respectively to the plural layers, and a merging unit for merging individual items of information based on the frequency signal groups obtained by the MIMO separation, the items of information corresponding respectively to the plural layers.

Abstract: Provided are a wireless communication system, communication apparatus, communication method, and communication program able to more reliably decode transmit signals at a receiver without more complex processing, even when resource blocks are overloaded. A communication apparatus configured to decode data received on each of at least two streams comprises: a resource block allocation determiner configured to determine an allocation of resource blocks for each stream; and a control information determiner configured to determine control information regarding data transmission on at least one stream, on the basis of the overload ratio of resource blocks among at least one group of streams.

Abstract: A mobile station device is provided that is capable of suppressing an increase in a resource that is occupied by a PUCCH while maintaining backward compatibility in LTE. A reference signal that is spread using a spread code that has an orthogonal relationship with a spread code is arranged in a domain in which a data signal that is spread by the spread code is arranged in the PUCCH in the LTE in the related art.

Abstract: There has been a problem that when transmit power control is performed so as to compensate for a certain pathloss regardless of a type of a transmit signal, reception is not performed at a receiving end with an appropriate receive power in a case where a destination differs depending on a type of a transmit power. A terminal device includes a transmit power control unit that determines a transmit power. The transmit power control unit includes at least two types of transmit power equations which are used in determining the transmit power, determines the transmit power based on one of the equations when a scheduling request is transmitted to one of the multiple base stations, and determines the transmit power based on the other equation that is different from the one equation when information is transmitted to an another one of the base stations. The terminal device includes a transmission unit that transmits data based on the determined transmit power.

Abstract: A terminal uses different access methods between when the terminal transmits a signal to a pico base station and when the terminal uses a macro base station as a receiving station without increasing the amount of control information to be transmitted from the base station to the terminal. A terminal apparatus of the present invention communicates with a macro base station that forms a first cell or a pico base station that forms a second cell smaller than the first cell. Upon reception of an instruction to communicate with the pico base station from the macro base station (S5), the terminal apparatus communicates with the pico base station using a second access method different from the access method used in the communication with the macro base station (S10).

Abstract: A wireless transmission device is provisioned with a communication parameter setting unit configured to group time domain signals and setting different communication parameters for each group, a clipping unit configured to perform a clipping processing in the frequency domain on at least a portion of groups of the time domain signal, and a transmitting unit configured to transmit the time domain signal after the clipping processing.

Abstract: There has been a problem that overhead increased from a time when a macro base station apparatus transmits, to a mobile station apparatus, an instruction of connection to small cell to a time when a pico base station apparatus performs scheduling of the mobile station apparatus.

Abstract: A bit coding device that creates a coded bit sequence by performing error correction coding on an input bit sequence that is input, includes a coding unit that creates a first bit sequence by performing the error correction coding on the input bit sequence, an extraction unit that extracts a second bit sequence from the first bit sequence, and an information compression unit that creates a third bit sequence by performing lossy compression on the second bit sequence, in which coded bits include at least a portion of the third bit sequence.

Abstract: An encoding unit encodes an information bit sequence. An IDFT unit generates a spectrum from the signals of the information bit sequence. A clipping unit generates, when re-transmitting the information bit sequence, a transmission spectrum that differs from that of the previous transmission. An OFDM signal generation unit transmits the transmission spectrum.

Abstract: In a case where transmission power control is performed for a plurality of CCs in CA, information transmitted between a transmitter and a receiver in terms of the transmission power control is reduced. A wireless communication apparatus according to the present invention is a wireless communication apparatus configured to perform communication using at least two or more types of component carriers, including transmission power control units 106-1 to 106-3 configured to select one calculation formula from a plurality of different calculation formulas depending on a type of the component carrier and calculate transmission power of the component carrier, and an RF unit 107 configured to perform communication using the component carrier based on the calculated transmission power.

Abstract: A wireless communication system includes a first communication device and a second communication device, in which the first communication device includes a cyclostationarity assignment unit that establishes a correlation between signals on two subcarriers that are a predetermined interval away from each other, the two subcarriers including at least one subcarrier on which a data signal to be transmitted to the second communication device is arranged, and the second communication device includes a frequency interval determination unit that determines the predetermined frequency interval according to information that has to be notified to a different device by the first communication device. Thus, a communication system is provided that is capable of suppressing a decrease in frame efficiency when assigning cyclostationarity.

Abstract: A wireless communication system includes a first wireless communication apparatus, which includes a plurality of transmission antennas and transmits signals in an MIMO scheme, and a second wireless communication apparatus, which receives the signals. The first wireless communication apparatus performs the same frequency allocation for transmission antennas from which the same data is transmitted in case that transmission is performed in a rank less than the number of transmission antennas.

Abstract: A transmission device, a communication system, a transmission method, and a transmission program that enhance transmission efficiency and communication quality in CA are provided. Signals of a plurality of bands are transmitted by using a first access scheme for a signal of a first band, which is at least one of the plurality of bands, and by using a second access scheme for a signal of a second band, which is at least another one of the plurality of bands. The first access scheme is a frequency spread scheme and the second access scheme is a frequency division multiplexing scheme.

Abstract: Disclosed is a mobile station device 101 that receives a first reference signal transmitted at a first time interval and a second reference signal transmitted at a time interval shorter than the first time interval from a base station device, and includes a path loss calculating unit 111 that calculates a path loss based on both of the first reference signal and the second reference signal, or that selects any one of the first reference signal and the second reference signal in accordance with a condition and calculates a path loss. Further, the path loss calculating unit 111 corrects the path loss calculated based on any one of the first reference signal and the second reference signal, based on the other reference signal.

Abstract: A mobile station apparatus includes a plurality of PAs (Power Amplifiers) and a plurality of antennas and transmission performances thereof is to be improved when transmission signals having peak powers different from one another are transmitted through the use of the respective antennas. A transmission apparatus includes a plurality of PAs and a plurality of antennas and transmits a signal having a high peak power, by means of determining a transmission signal to be transmitted through the use of each of the PAs based on the capability of each of the PAs, converting the transmission signal into a frequency signal by time-frequency conversion, dividing the frequency signal into a plurality of clusters, and allocating the clusters to bands non-contiguously. Furthermore, the transmission apparatus transmits a signal having a low peak power by means of allocating the frequency signal to continuous bands.

Abstract: When signals to be transmitted to a plurality of mobile station devices are multiplexed by hierarchical modulation in a downlink, an increase in difference in reception quality among the mobile station devices is prevented. A transmitting device of the present invention is a transmitting device which performs data transmission to a plurality of receiving devices by using a plurality of symbols and a plurality of layers with different distances between signal points, and includes a modulating unit 118-n which assigns data to be transmitted to a first receiving device to a first layer in a predetermined symbol of the plurality of symbols and assigns data to be transmitted to a second receiving device different from the first receiving device to the first layer in remaining symbols and a transmission processing unit 127 which transmits each data assigned to the first layer to the first receiving device and the second receiving device.

Abstract: In a communication system for performing transmission using non-contiguous frequency bands, transmit power control is performed in which minimum MPR is applied. A wireless transmission apparatus allocates at least one spectrum within a system band and performs transmit power control. The wireless transmission apparatus includes a dividing unit that divides a spectrum into non-contiguous clusters on the basis of band allocation information, a power control amount determining unit that determines transmission power for the spectrum or each of the clusters in accordance with a frequency band to which the spectrum or the cluster is allocated, a power control unit that performs transmit power control on the spectrum or each of the clusters by using the determined transmission power, and an allocating unit that allocates the spectrum or each of the clusters on which transmit power control has been performed to a frequency band on the basis of the band allocation information.

Abstract: In a radio communication method non-contiguously using a frequency, notification information is reduced, while suppressing an effect on performance. In a communication apparatus which switches between a communication method contiguously using a frequency and a communication method non-contiguously using the frequency, sets a parameter corresponding to each communication method, and performs radio communication, the communication apparatus sets a same parameter to an entire frequency band in the communication method contiguously using the frequency, while dividing a frequency band into a plurality of frequency bands and setting a different parameter for each divided frequency band in the communication method non-contiguously using the frequency. The communication method contiguously using the frequency and the communication method non-contiguously using the frequency mutually have different PAPR (Peak to Average Power Ratio) characteristics.

Abstract: Means of configuring a reference signal unique to a mobile station apparatus is provided. There is provided a control station apparatus notifying a first mobile station apparatus of a parameter group generating a reference signal. The control station apparatus includes: an RRC layer to configure a parameter set including a plurality of parameter groups generating the reference signal; and a physical layer to select one of the parameter groups and notify the mobile station apparatus. It is preferred that the parameter set is configured with a plurality of parameter groups that respectively configure a sequence number and a cyclic shift hopping pattern of the reference signal and includes a parameter group generating a reference signal the same as in a second mobile station apparatus different from the first mobile station apparatus.

Abstract: A reception device that can transmit, at a good error rate, information on which error correction has been performed by a block code is provided. The reception device includes a demodulating unit that generates a demodulation result of each coded bit for the signal received from the transmission device, a decoding unit that calculates a post-decoding likelihood of the block code based on the demodulation result, a symbol replica generating unit that generates a symbol replica based on the post-decoding likelihood, and a cancelling unit that cancels interference from the received signal by using the symbol replica.