摘要:
Provided are a mobile terminal apparatus, a radio base station apparatus and a communication method, capable of orthogonalizing uplink reference signals between plural antennas in MIMO transmission. The mobile terminal apparatus has a reference signal generator (11) for generating DM-RSs using ZC sequences and a cyclic shift section (13) for cyclically shifting the DM-RSs by unit of plural antenna ports (19) to orthogonalize the DM-RSs for the antenna ports (19) between the antenna ports (19), and the cyclically shifted DM-RSs are transmitted via the respective antenna ports (19) to a radio base station apparatus eNB in an uplink.
摘要:
Provided are a mobile terminal apparatus, a radio base station apparatus and a communication method, capable of orthogonalizing uplink reference signals between plural antennas in MIMO transmission. The mobile terminal apparatus has a reference signal generator (11) for generating DM-RSs using ZC sequences and a cyclic shift section (13) for cyclically shifting the DM-RSs by unit of plural antenna ports (19) to orthogonalize the DM-RSs for the antenna ports (19) between the antenna ports (19), and the cyclically shifted DM-RSs are transmitted via the respective antenna ports (19) to a radio base station apparatus eNB in an uplink.
摘要:
To provide a mobile terminal apparatus, radio base station apparatus and radio communication method for enabling data signals and control information for a plurality of component carriers to be transmitted efficiently, a radio communication method of the invention is characterized in that a mobile terminal apparatus maps a retransmission response signal and another signal to different resources in a first mode for transmitting a retransmission response signal for each downlink CC of a plurality of downlink CCs, while mapping the retransmission response signal and another signal to the same resources in a second mode for transmitting a single retransmission response signal for a plurality of downlink CCs, and that the radio base station apparatus receives the uplink signal, preforms resource-demapping on each of the retransmission response signal and another signal mapped to different resources in the first mode, while performing resource-demapping on the retransmission response signal and another signal mapped to the same resources in the second mode, and demodulates the retransmission response signal.
摘要:
A user device for a mobile communication system employing a multicarrier scheme is disclosed. The user device includes a control signal generating unit for generating a control signal. The user device also includes a transmitting unit for transmitting the control signal to a base station. The control signal sent by the user device is mapped to multiple frequency bands throughout a time period of a subframe but separated from each other in a frequency domain. Each of the frequency bands includes subcarriers used in orthogonal frequency division multiplexing.
摘要:
A mobile terminal apparatus and a radio communication method are provided which can efficiently transmit feedback control information through a physical uplink control channel. The radio communication method according to the present invention uses a plurality of ACK/NACK control bits as data signals, adds cyclic shifts to a plurality of reference signal blocks of a plurality of time blocks in a physical uplink control channel format comprised of a plurality of time blocks, multiplies the plurality of reference signal blocks by orthogonal codes and transmits a control channel signal including reference signals by which orthogonal codes are multiplied to a radio base station apparatus through a physical uplink control channel.
摘要:
A disclosed user device generates an uplink control channel including at least one of acknowledgement information and a channel quality indicator regarding downlink and transmits the uplink control channel via a dedicated frequency band when no resource is allocated for transmission of an uplink data channel. The uplink control channel includes multiple unit blocks constituting a subframe and each of the unit blocks includes a sequence generated by multiplying all chips of an orthogonal code sequence assigned to the user device by the same factor.
摘要:
In a closed-loop TPC for a channel using a wireless resource, to which frequency hopping is applied, a high quality reception is achieved for all RBs without applying another technique to each RB. This transmission power control method, in a mobile communications system that transmits signals by frequency hopping in a plurality of resource blocks, includes a transmission power control method that transmission-power controls a channel in a closed loop using a wireless resource to which frequency hopping is applied, measures a reception channel quality of received signals for each resource block (RB1 and RB2), and transmits a TPC command-bit via a downlink so that the reception quality that is independently measured at each resource block among the resource blocks is made equal to a target reception quality.
摘要:
A user apparatus to which radio access schemes of a single-carrier scheme and a multicarrier scheme are applied includes: a radio access scheme setting unit configured to set a radio access scheme; a discrete Fourier transform unit configured to perform discrete Fourier transform on a modulated symbol sequence when the radio access scheme is the single-carrier scheme; a serial parallel conversion unit configured to perform serial parallel conversion on the modulated symbol sequence when the radio access scheme is the multicarrier scheme; a frequency domain signal generation unit configured to assign radio resources to the modulated symbol sequence on which discrete Fourier transform has been performed or to the demodulated symbol sequence on which serial parallel conversion has been performed so as to generate a signal in the frequency domain; a waveform shaping filter configured to perform waveform shaping on the signal in the frequency domain; a transmission signal generation unit configured to perform inverse fast Fourier transform on the signal in the frequency domain on which waveform shaping has been performed so as to generate a transmission signal; and a transmission unit configured to transmit the transmission signal by radio.
摘要:
The present invention provides a radio base station apparatus and a transmission power control method that do not deteriorate the uplink reception quality of cell-edge users when uplink MU-MIMO transmission is applied. The transmission power control method of the present invention includes the steps of: in a radio base station apparatus that performs space division multiplexing between users by uplink MU-MIMO transmission: controlling transmission power according to a number of MU-MIMO multiplexed users; and transmitting transmission power information to match the number of MU-MIMO multiplexed users; and in a mobile terminal apparatus: setting transmission power using the transmission power information; and transmitting an uplink signal by the transmission power.
摘要:
The present invention is provided to, when there is a PUSCH signal to transmit in the same subframe as a UCI signal, make the method of transmitting uplink control information in the LTE system adaptable to a broader system band and increase in transmission layers only by minor changes. A UCI signal is generated to a base station apparatus (20) of a mobile communication system having a system band composed of plural component carriers. The UCI signal is multiplexed to a PUSCH signal in each of component carriers where the PUSCH signal is transmitted in the same subframe as the UCI signal. The PUSCH signal to which the UCI signal is multiplexed is transmitted to the base station apparatus (20).