摘要:
A transmitter comprises: a division unit configured to divide a transmission data sequence into multiple sequences corresponding to multiple transmit antennas; an attachment unit configured to attach a CRC bit to each of the resulting sequences from the division unit; a channel coding unit configured to perform channel coding on each of the CRC bit attached sequences; a hybrid ARQ processing unit configured to perform a hybrid ARQ operation on each of the channel coded sequences; a mapping unit configured to map each of the resulting sequences from the hybrid ARQ processing unit into a frequency block; and a modulation unit configured to perform adaptive data modulation on each of the mapped sequences. A channel coding rate applied for the channel coding is controlled per transmission time interval, the hybrid ARQ operation is controlled per the transmission time interval, the frequency block is scheduled in a frequency domain, the scheduling being controlled per frequency block, and a modulation scheme applied for the adaptive data modulation is controlled per the transmission time interval.
摘要:
To provide a radio base station apparatus and radio communication method capable of performing radio communications using downlink reference signal structures suitable for antenna virtualization, a radio base station apparatus (200) has a plurality of transmission antennas, generates CRSs used in demodulation of at least downlink control information, CQI-RSs generated for each of the transmission antennas used in measurement of channel quality, and DM-RSs generated for each stream used in demodulation of downlink transmission data, and multiplexes the CRSs, CQI-RSs and DM-RSs into a same transmission time unit to transmit from each of the antennas.
摘要:
A base station communicating with a mobile station in a radio communication system by using OFDM for downlink is disclosed. The base station includes a sequence selecting unit configured to select multiple synchronization signal sequences; a synchronization signal generating unit configured to generate a secondary synchronization channel based on a part of the selected synchronization signal sequences and another part of the selected synchronization signal sequences; and a transmitting unit configured to transmit the secondary synchronization channel. The secondary synchronization channel is used to detect cell-specific information
摘要:
A transmission apparatus which attempts improvement of signal quality in an uplink and a downlink carries out radio transmission of different signals simultaneously from respective ones of a plurality of antennas. The apparatus has pilot multiplexing means for multiplexing a pilot channel to transmit from each antenna in one or more of a time division multiplexing method, a frequency division multiplexing method and a code division multiplexing method, data multiplexing means for time-multiplexing a pilot channel and a data channel, and means for transmitting a signal in a least one of a space division multiplexing (SDM) method and a space time transmission diversity (STTD) method.
摘要:
A disclosed user apparatus includes a random access channel generating unit configured to generate a random access channel; a control channel generating unit configured to generate a control channel in accordance with scheduling information received from a base station; and an uplink transmission signal generating unit configured to generate an uplink transmission signal including the random access channel or the control channel. Further, the purpose ID indicating at least whether there is a user ID uniquely allocated by the base station is included in the random access channel or the control channel.
摘要:
In a radio communication system, a user terminal transmits a reservation packet to a base station using a common control channel (1), and the base station assigns an uplink data channel to the user terminal according to the reservation packet, and assigns a first shared control channel (2b) to the user terminal in association with the uplink data channel, and the mobile station transmits a control signal to the base station using the associated uplink shared control channel. According to status of radio communication, the base station may assign beforehand a second uplink shared control channel (2a) for which occupation by the user terminal is permitted only while the user terminal is performing communication.