Abstract:
A terminal apparatus is disclosed wherein even in a case of applying SU-MIMO and MU-MIMO at the same time, the inter-sequence interference in a plurality of pilot signals used by the same terminal can be suppressed to a low value, while the inter-sequence interference in pilot signal between terminals can be reduced. In this terminal apparatus (200): a pilot information deciding unit (204) decides, based on allocation control information, Walsh sequences of the respective ones of first and second stream groups at least one of which includes a plurality of streams; and a pilot signal generating unit (205) forms a transport signal by using the decided Walsh sequences to spread the streams included in the first and second stream groups. During this, Walsh sequences orthogonal to each other are established in the first and second stream groups, and users are allocated on a stream group-by-stream group basis.
Abstract:
Provided are a radio communication mobile station apparatus, a radio communication base station apparatus and a radio communication method, which make it possible to correctly switch between transmission modes for a PUSCH and a PUCCH while impeding signaling overhead from increasing. A transmission mode setting unit (107) detects an instruction given by a base station, the instruction indicating a multiplexing method for a PUSCH and a PUCCH. A trigger information reporting determination unit (108) performs threshold discrimination where PHR_pucch, which is calculated by PHR_control calculation unit (106), is compared with a threshold value that depends on the multiplexing method indicated by the instruction given by the base station. Specifically, in a TDM transmission mode, trigger information is reported if PHR_pucch > X1[dBm] is satisfied. On the other hand, in an FDM transmission mode, the trigger information is reported if PHR_pucch
Abstract:
In a case where a second reference signal for a second communication system is transmitted in addition to a first reference signal for a first communication system, resources that affect a reception apparatus compatible only with the first communication system can be minimized, and the throughput can be prevented from being deteriorated. As resources for a reference signal CSI-RS for LTE-A, last half symbols in a time direction of a resource unit RB/Sub-frame defined in a frequency-time domain are used, and the CSI-RS is allocated in a position up to the last two symbols or in the last symbol, or the like, of a particular RB/Sub-frame and transmitted when a reference signal 4RS for LTE is transmitted to a reception apparatus in addition to transmitting CSI-RS for LTE-A. The reception apparatus receives CSI-RS allocated in the last half symbol of RB/Sub-frame on the basis of CSI-RS allocation information, measures channel quality such as CQI, PMI or RI by using this CSI-RS, and transmits and reports feedback information containing channel quality information to a transmission apparatus.
Abstract:
Disclosed is a CCE+ number allocation method which reduces the ACK/NACK (Acknowledgment/Negative Acknowledgment) collision probability in a mixed system containing an LTE (Long Term Evolution) system and an LTE+ (Long Term Evolution Advanced) system. A CCE(Control Channel Element)+ number is defined by selecting a number from CCE numbers of the CCE to contain PDCCH (Physical Downlink Control Channel) allocated in a resource element region constituting CCE+ where PDCCH + is arranged. This can prevent overlapped selection of the CCE number and the CCE + number even when the PDCCH and the PDCCH+ are simultaneously transmitted. Thus, it is possible to reduce the collision probability of ACK/NACK correlated to the CCE number and the CCE+ number.
Abstract:
The present disclosure provides an orthogonal codes based code division multiplexing method of performing the code division multiplexing of demodulation reference signals in multiple layers of resource blocks by using orthogonal matrices, the method comprising: changing the order of chips in particular rows of a first orthogonal matrix to obtain a second orthogonal matrix with the changed order of chips; and multiplying the chips in respective rows of the second orthogonal matrix by the demodulation reference signals in corresponding layers of resource blocks correspondingly in the time direction to obtain code division multiplexing signals. The technical scheme of the present disclosure can improve the power jitter situation of downlink signals on the time, thereby the usage efficiency of the power amplifier at the base station side can be improved.
Abstract:
dispositivo de comunicação sem fio e método para controlar a potência de transmissão. a presente invenção refere-se a um dispositivo de comunicação sem fio, que suprime um aumento no consumo de potência de um terminal, enquanto evita a degradação de precisão de medição sinr resultante de erros tpc em uma estação base. um terminal (100) controla a potência de transmissão de um segundo sinal, adicionando um deslocamento à potência de transmissão de um primeiro sinal; uma unidade de ajuste de deslocamento (106) ajusta um valor de correção de deslocamento, em resposta a um espaço de tempo de transmissão entre um terceiro sinal transmissão transmitido em um instante anterior e o segundo sinal transmissão transmitido neste momento, e uma unidade de controle de potência de transmissão (111) controla a potência de transmissão do segundo sinal usando o valor de correção.
Abstract:
Un aparato de comunicaciones que comprende: un transmisor, que, en operación, transmite un valor de desplazamiento a un equipo de usuario; y un receptor, que, en operación, recibe, desde el equipo de usuario, información de control de enlace ascendente que se multiplexa por tiempo con los datos de usuario de acuerdo con una tasa de codificación, la tasa de codificación que se ajusta sobre la base de una tasa de codificación de los datos de usuario y el valor de desplazamiento que se basa en un primer desplazamiento de acuerdo con el tipo de la información de control de enlace ascendente, caracterizado porque la tasa de codificación se ajusta sobre la base del valor de desplazamiento que también se basa en un segundo desplazamiento asociado con un rango de un canal de datos en el que se reciben los datos de usuario.