摘要:
A decrease in a transmission capacity is suppressed even when CSI is not fed back from a mobile station apparatus to all cooperating base station apparatuses. A base station apparatus (BS2) decides, according to the presence/absence of CSI fed back from a plurality of mobile station apparatuses (MS (MS1, MS2)), a cooperation target mobile station apparatus (MS2) to which the base station apparatus transmits a signal in cooperation with another base station apparatus (BS1) and a non-cooperation target mobile station apparatus (MS1) to which a specific base station apparatus (BS1) transmits a signal, and generates a precoding weight for the signal transmitted to the cooperation target and non-cooperation target mobile station apparatuses (MSs) based on the channel state information.
摘要:
The communication apparatus includes: a processing unit 52 configured to determine a data modulation scheme for each stream based on first signal quality q1 for each stream determined by the MMSE method; a processing unit 54 configured to determine second signal quality q2 corresponding to the first signal quality q1; a processing unit configured to determine third signal quality q3(1) of a stream by adding first signal quality q1(1) of the stream and a correction value Δq(1) derived from second signal quality q2(2) of equal to or more than 1 stream other than the stream; and a processing unit 58 configured to determine channel coding rate Rk corresponding to third signal quality q3(1) for each stream. The determined data modulation scheme and channel coding scheme are used for transmission of a following stream.
摘要:
A transmitter includes multiple transmit antennas, a conversion unit configured to generate multiple signal sequences corresponding to a predefined frequency bandwidth from one or more transmission streams associated with any of the transmit antennas, a precoding unit configured to weight the signal sequences with a precoding matrix selected from a codebook including multiple predefined precoding matrices, and a transmitting unit configured to convert an output signal from the precoding unit into a number of signals corresponding to the number of transmit antennas and transmit the converted signals from the transmit antennas. The precoding unit applies distinct precoding matrices to different signal sequences, and an association between the distinct precoding matrices and the different signal sequences is determined through open-loop control being independent of a feedback from a receiver.
摘要:
The accuracy of an equalization start timing, an equalization duration and a channel estimation is improved in an application including an increased number of users. An equalization start timing t0, an equalization duration te and channel H estimation are performed for each user signal, and using these, received signal replicas Re1 ro ReN for the respective users are generated. The replicas are subtracted from the received signal to provide an error signal, and Re1 to ReN are added to Es to provide an interference suppressed received signals for the users 1 to N. to, te, H and Re1 to ReN are generated from these to generate Es in a repeated fashion to improve the accuracy of t0, te and H.
摘要:
A receiver (100) in a communication system for detecting a data signal included in a received signal transmitted by a transmitter is disclosed. The receiver comprises a channel estimator (101-1) for estimating a channel and outputting a channel estimation value; an interference signal removing unit (101-2, 101-3) for generating a received signal replica of a non-data signal included in the received signal using the channel estimation value, and removing the received signal replica of the non-data signal from the received signal; and a data signal detector (102) for detecting the data signal using an output from the interference signal removing unit.
摘要:
A user equipment 10 according to the present invention is provided with a RSSI measuring unit 107 that, with regard to a predetermined sub-frame, is configured to measure a radio quality of a serving cell and a neighboring cell for all OFDM symbols within the predetermined sub-frame and that, with regard to sub-frames other than the predetermined sub-frame, is configured to measure the radio quality of the serving cell and the neighboring cell for OFDM symbols containing a reference signal within the sub-frames.
摘要:
The present invention is designed to execute adequate signaling even when individual user terminals perform communication to support separate types of communication, in MIMO transmission to use antennas having varying antenna configurations depending on the type of communication. A radio base station (200) has an antenna that has varying antenna configurations between at least two types of communication and that can transmit signals to all areas which the radio base station covers, in an antenna configuration to support at least one communication type 1, allocates radio resources to a downlink signal including capacities of a user terminal and a signal type to match a communication type, multiplexes a plurality of reference signals to be used in each communication type on the same resource block, generates precoding weights which allow the antenna to form a number of beams to match the communication type, and multiplies a downlink signal to supply to the antenna by the generated precoding weights.
摘要:
A telecommunication control method for a heterogeneous network is provided. Uplink interference created by first user equipment (MUE) connected to a first-type cell (MeNB) is detected at the second-type cell (HeNB). The second-type cell reports the interference pattern of the detected interference to the first-type cell. The first-type cell identifies the interfering first user equipment based upon the interference pattern. The first-type cell notifies the second-type cell of the scheduling information of the interfering first user equipment. The second-type cell determines scheduling for second user equipment (HeUE) connected to the second-type cell based upon the scheduling information of the first user equipment.
摘要:
A user equipment 10 according to the present invention is provided with a RSSI measuring unit 107 that, with regard to a predetermined sub-frame, is configured to measure a radio quality of a serving cell and a neighboring cell for all OFDM symbols within the predetermined sub-frame and that, with regard to sub-frames other than the predetermined sub-frame, is configured to measure the radio quality of the serving cell and the neighboring cell for OFDM symbols containing a reference signal within the sub-frames.
摘要:
Provided is a mobile communication method including a step A of transmitting, by a mobile station UE, “Measurement Report” including measurement results of radio qualities of neighboring cells #2 to #4 in a downlink to a radio base station eNB#1 that manages a cell #1 in which the mobile station UE is in communication, a step B of selecting, by the radio base station eNB#1, the cell #2 from among the neighboring cells #2 to #4 on the basis of the “Measurement Report”, and a step C of transmitting, by the radio base station eNB#1, “DL HI indication” indicating an influence of interference on the mobile station UE in a downlink direction being strong to a radio base station eNB#2 that manages the cell #2.